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High Resolution Satellite Imagery, in real time.

The same GOES, Himawari, and Meteosat imagery meteorologists use — radar, lightning, NWS warnings, and model overlays, from full-disk down to 1-minute mesoscale. Free to start.

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GOES-East & GOES-West MRMS radar GLM lightning NWS warnings SPC / WPC outlooks RTMA / RAP model fields 9 RGB composites & all 16 ABI channels Full Disk ~10 min CONUS ~5 min Regional sub-CONUS sector 1-minute mesoscale

See it in motion

Fast and sharp on any device

Imagery is pre-rendered on our servers and streamed to your device — smooth zoom and animation loops that stay sharp at every scale.

Layer the weather

Drop radar, lightning, warnings, and model fields right onto the imagery.

Zoom from disk to street

Pinch and pan from the full hemisphere down to your metro area.

Compare side by side

Dual- and quad-pane views, time-locked to the same frame.

Everything in one viewer

The full picture, in one place

Our backend calibrates all 16 ABI channels around the clock and layers real-time weather data on top — radar, lightning, warnings, and model fields.

🛰️

Every band, every domain

All 16 ABI channels plus 9 RGB composites — GeoColor, Sandwich, AirMass, Fire Temperature, Dust, and more — from hemispheric full-disk to 1-minute mesoscale.

⚠️

Severe weather, layered

NWS tornado, severe, and flash-flood warnings, SPC convective outlooks, WPC excessive-rainfall outlooks, and ProbSevere storm probabilities.

📡

Radar & lightning

MRMS multi-radar composite reflectivity overlaid on the image, plus GLM lightning straight from the satellite — flash points, density, and minimum flash area.

🌡️

Model & surface data

RTMA temperature, dewpoint and wind; RAP upper-air fields at five pressure levels; METAR station plots with standard symbology.

✏️

Analysis tools

Front drawing, pixel inspector with real channel values, distance measurement, time-series charting, and screenshot / animated-GIF export.

⭐

Favorites & sync

Save any combination of domain, product, overlays, and loop settings. A free account syncs them across web, iOS, and Android.

Built for analysis

Tools for real analysis

▸Draw & annotate — fronts, troughs, drylines, pressure centers, and text, included in every export.
▸Pixel inspector — read cloud-top brightness temperature in real units anywhere on the image.
▸Time-series chart — pin a point and track intensification, fire growth, or fog burn-off over the loop.
▸Distance & measure — km, miles, and nautical miles with domain-aware scaling.
▸Dual & quad pane — Sandwich + Clean IR + radar + lightning in one time-locked view.

Draw fronts & annotate

Time series — track a point over the loop

Coverage & cadence

From the whole hemisphere to your local area

Every product is generated across dozens of domains — and the fastest sectors refresh as quickly as the satellite scans.

10 min

Full Disk

GOES East & West, plus Himawari (Asia-Pacific) and Meteosat (Europe, Africa, Indian Ocean).

5 min

CONUS

The continental-US workhorse, all day, every day.

1 min

Mesoscale

NWS-targeted sectors aimed at active severe weather & fires.

Sub domains

Regional & local

Numerous regional to local sectors from the Full Disk and CONUS datasets.

Under the hood

Built on our servers, light on your device

The processing happens on our servers — your device just displays the result, fast even on older phones.

Calibrate

Raw GOES ABI data is pulled from NOAA's buckets and all 16 channels are calibrated to real radiances and brightness temperatures.

Composite & project

Numba-accelerated algorithms build RGB products and project everything onto regional Mercator grids — GeoColor day/night, AirMass, and more.

Layer & serve

Radar, lightning, warnings, and model fields are rasterized onto matching grids and written as ready-to-view images for web and mobile.

Plans & pricing

Start free. Upgrade to Pro anytime.

Every new account starts with a 14-day free trial of Pro — every domain, every channel, all overlays, radar, lightning, and the archive. Keep it for $19.99/year, or drop to Free anytime.

Free

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CONUS, full disk & a live mesoscale sector
Every RGB and all 16 channels
20-frame loops, 6-hour archive
Every overlay — radar, lightning, NWS, SPC, model & surface
Drawing, measuring, save & share
1 saved favorite

Open the viewer

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Pro

$19.99 / year

or $1.99/month · save 16% yearly

Numerous metro, state & regional views — far sharper than zooming CONUS
Both mesoscale sectors at once
Full-resolution data everywhere, not just the overview
200-frame loops, the full 48-hour archive
Pixel inspector, soundings, cross sections & time series
Multi-pane, high-res export, unlimited favorites & sync

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Pro+

Coming soon on the web

pricing announced at launch

Everything in Pro
Advanced forecast tools
More to be announced

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Weather safety notice. SatelliteWX is an informational and educational tool. Imagery, radar, lightning, model, and warning data come from third-party and government sources and may be delayed or incomplete. Always follow official National Weather Service warnings and local emergency guidance for decisions affecting safety of life or property.

8 model families · updated every cycle

Seasonal & sub-seasonal models, weeks to seasons ahead.

CFS, CanSIPS, ECMWF S2S and GEPS — monthly and tri-monthly anomalies for temperature, precipitation, wind and heights. The long-range guidance forecasters actually argue about, plotted the way you'd plot it yourself.

Open Seasonal Models

Examples

A few of the things you can pull up

CFS minus CFS 10-Run Mean, 500 hPa height anomaly over North America — **Model difference** — CFS minus its 10-run mean, 500 hPa height over North America, with contours overlaid on the difference fill.

2 m temperature anomaly, global — **2 m temperature anomaly** — global monthly mean; scroll to zoom into any region.

**Precipitation anomaly** — monthly, alongside percent-of-normal.

Sea-surface temperature anomaly over the Pacific — **Sea-surface temp anomaly** — over the Pacific. Europe, Asia, North America and both poles are a click away, or scroll to zoom to your own view.

What's in there

Built for the long range

Temperature & precipitation

2 m and 850 hPa temperature anomalies, precipitation anomaly and percent-of-normal, monthly or tri-monthly.

Heights & pressure

500 hPa height anomaly and MSLP anomaly — the pattern behind the sensible weather.

Wind

Zonal, meridional and velocity-potential fields at 200 and 850 hPa, as streamlines or barbs.

Compare them

Difference one model against another on the same field, or overlay them on the same map.

Animate & save

Play the run forward month by month, then save the loop as an animation or grab any single frame as an image.

Coverage

Global, with the regions you actually work in

Every model runs on a global grid. Jump straight to North America, Europe, Asia, the Pacific or either pole, or scroll to zoom anywhere in between — the domain buttons are shortcuts, not separate products.

Pricing

Mostly free. Pro is $1.99 a month.

Seasonal is free to use, with the 500 hPa height anomaly on every model. Pro adds every seasonal map on every model and side-by-side model comparison.

See what Pro includes

Free account

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Create a free account to save favorites and carry them across web, iOS and Android. Sign in with a magic-link email, Google, or Apple — no separate registration step.

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Daily OISST · a year of history

Sea Surface Temperatures, Sea Ice, and Oceanic Indices

Global 0.25° SST, anomaly, normalized anomaly and sea-ice — plus the climate indices that drive a seasonal forecast, computed off the same field you're looking at.

Open Ocean Plots

Examples

A few of the things you can pull up

SST anomaly zoomed to the Indian Ocean — **Indian Ocean** — scroll to zoom anywhere on the map and drag to pan. One global field; every basin is just a view of it.

Normalized SST anomaly zoomed to the equatorial Pacific — **Normalized anomaly, zoomed** — domain-mean removed, over the equatorial Pacific.

SST anomaly change over the last 30 days — **Change plot** — anomaly now minus anomaly 30 days ago: where the ocean is warming or cooling.

Arctic sea-ice concentration with extent and area — **Sea ice** — North Pole view, with hemispheric extent and true-area figures.

Equatorial Pacific subsurface temperature anomaly depth section — **Equatorial subsurface** — ARMOR3D temperature anomaly down to 500 m along 2°S–2°N, with the 20 °C isotherm against its 1993–2020 normal. Watch warmth move east under the surface weeks before it reaches the SST map.

Sea-surface temperature over the Atlantic — **Atlantic SST** — raw temperature rather than anomaly, zoomed to the basin.

What's in there

More than a pretty map

Six analyses

SST, anomaly vs 1991–2020, 30-day anomaly change, domain-mean-removed normalized anomaly, sea-ice concentration, and an equatorial subsurface depth section.

Change over time

Difference any date against 30, 60 or 90 days back — with the true value under the cursor.

Indices, live

The ENSO and basin indices update with the field, so the number and the map can never disagree.

Basins & poles

Global, Pacific, Atlantic, Indian, Maritime, Equatorial Pacific and both poles.

Animate & save

Play a year of daily fields as a loop, then save the animation or grab any single day as an image.

Coverage

The whole ocean, every day

One global 0.25° field per type, updated daily, with about a year of history behind it. Global, Pacific, Atlantic, Indian, Maritime, Equatorial Pacific and both poles are views of that same field — scroll to zoom anywhere.

Pricing

Mostly free. Pro is $1.99 a month.

Ocean is free to use, with the last 30 days. Pro adds the full ocean history.

See what Pro includes

Free account

Save your views. Sync everywhere.

Create a free account to save favorites and carry them across web, iOS and Android. Sign in with a magic-link email, Google, or Apple — no separate registration step.

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Rebuilt every hour · graded against RTMA

Grade model forecasts against what actually happened.

Compare model forecasts against what actually happened every hour. This is done by differencing NCEP's 2.5 km RTMA analysis against the forecast. Error maps for 8 parameters across multiple models are created, as well as run-by-run trends for every point in the CONUS.

Open Verification

Examples

A few of the things you can pull up

HRRR 2 m temperature error zoomed to the southern Plains with recomputed statistics — **Zoom with live statistics** — scroll into the southern Plains and the bias, MAE, RMSE and p90 recompute for exactly the area on screen. County lines and city labels appear as you go tighter.

Run-to-run overlay of every model run's 2 m temperature forecast for Denver against the observed trace — **Run-to-run overlay** — every run's full forecast for one place and one hour, newest brightest, over the observed trace. Here: a 12 °F daytime bust at Denver, and which model missed by least.

Forecast by run: each initialization's forecast for one hour against the RTMA actual — **Forecast by run** — one dot per initialization. Watch successive runs walk toward reality, or away from it.

GFS 500 hPa height error at 48-hour lead against the HRRR analysis — **Upper air too** — 500 hPa height, 850 hPa temperature and MSLP, graded against the HRRR analysis where RTMA has nothing to offer — with that caveat stated right on the plot.

What's in there

An honest scoreboard

Hourly error maps

Forecast-minus-RTMA for 8 surface and upper-air parameters and 6 models, rebuilt every hour on a common 0.05° CONUS grid.

Lead-time slider

The same verifying hour from runs launched 1 to 48 hours earlier — watch the error grow with lead.

Live zoom, live stats

Bias, MAE, RMSE and p90 recompute for exactly the area on screen, not the whole country.

Point trends

Run-to-run overlay and forecast-by-run views for any of 400 cities — or any point you click — across 10 models.

Valid-hour rewind

Step back through the day's hourly analyses to see how the models handled this morning.

Share & save

The whole view lives in the URL, and Save exports the map with its zoom and its numbers.

Coverage

CONUS, hourly, about an hour behind real time

Truth is RTMA — NCEP's hourly 2.5 km observation-fused analysis — for the surface fields, and the HRRR analysis for 850 hPa temperature, 500 hPa height and MSLP, labelled as such on every plot. The newest verifying hour lands roughly an hour behind real time; maps are kept through the day and point trends reach back 30 analyses.

Pricing

Mostly free. Pro is $1.99 a month.

Verification is free to use for GFS, HRRR, GEFS, AIGFS and NMME. Pro adds scores for every model and every run, with the full history.

See what Pro includes

Free account

Save your views. Sync everywhere.

Create a free account to save favorites and carry them across web, iOS and Android. Sign in with a magic-link email, Google, or Apple — no separate registration step.

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26 indices · computed in-house daily

Examine Multiple Climate Indices to Find What Is Driving the Pattern

Daily climate and teleconnection indices computed straight from OISST and NCEP analyses — with seasonal and subseasonal model forecasts appended, full ensemble plumes, an MJO phase diagram, and Hovmöllers that carry observations into the forecast.

Open Indices

Examples

A few of the things you can pull up

Daily Niño 3.4 index as bars with CanSIPS, CFS and ECMWF seasonal forecasts appended — **Indices with forecasts** — daily observed Niño 3.4, drawn as bars colored by sign, with CanSIPS, CFS and ECMWF Seasonal appended as dashed curves out to a year.

Niño 1+2, 3, 3.4 and 4 compared on one chart over the last year — **Compare regions** — Niño 1+2, 3, 3.4 and 4 on one chart: watch an event build in the east and spread west. Any indices can be stacked together this way.

NAO ensemble plume: GEFS Extended and ECMWF EPS members with means and spread bands — **Ensemble plumes** — every member of GEFS Extended and ECMWF EPS behind the ensemble mean and 10–90% band, on the observed NAO. Six ensembles, up to 101 members each.

MJO phase diagram in density view with the GEFS ensemble-mean forecast track — **MJO phase diagram** — RMM1/RMM2 phase space with Track, Scatter and Density views, sliders to replay any window of the record, and the GEFS forecast track.

200 hPa velocity potential Hovmöller across the tropics, observations extended by GEFS — **Tropical Hovmöllers** — 200 hPa velocity potential across the tropics, six months observed and extended by GEFS. MJO propagation at a glance; OLR and zonal wind get the same treatment.

10 hPa mean zonal wind at 60°N over the last year with SSW dates highlighted and ensemble forecasts — **Polar vortex & SSW** — 10 hPa mean zonal wind at 60°N with this year's sudden-stratospheric-warming dates highlighted in red, the climatology band behind, and GEFS and ECMWF Extended ensemble forecasts appended.

QBO time-height section: twelve years of equatorial zonal-mean wind on a log pressure axis — **Stratosphere** — twelve years of QBO regimes descending a log-pressure axis, plus polar-vortex wind and temperature in the same group.

What's in there

The whole pattern toolkit

26 daily indices

ENSO (Niño regions, ONI, TNI, RONI, Modoki), PDO, AMO, IOD, PMM, NAO, AO, PNA, EPO, WPO, AAO, QBO and polar-vortex metrics — computed in-house from OISST and NCEP analyses.

Model forecasts appended

Dashed CanSIPS, CFS and ECMWF curves out to a year on the SST indices; extended-range models on the teleconnections.

Ensemble plumes

Six ensembles drawn member by member behind the mean and spread band, with a box-and-whisker alternative.

MJO, three ways

Phase-space track, scatter and density views, a sliding window to replay any stretch of the record, and the GEFS forecast track.

Hovmöllers

ENSO evolution — observations continuing straight into a seasonal model — plus OLR, velocity potential and zonal wind across the tropics.

Stack, share, save

Plot indices together, smooth them, add a climatology band — then share the exact view as a link or a branded image.

Coverage

Computed here, every day, from primary data

Ocean and ENSO indices come from NOAA's 0.25° OISST against a 1991–2020 baseline; teleconnections are daily projections onto CPC's own loading patterns; MJO and the stratosphere come from GFS analyses. Observations run through yesterday, refreshed daily, with forecasts reaching out to a year.

Pricing

Mostly free. Pro is $1.99 a month.

Indices are free to use, with the last 90 days. Pro adds the full history, forecast lines from every model, and the angular momentum, Rossby wave and mountain torque panels.

See what Pro includes

Free account

Save your views. Sync everywhere.

Create a free account to save favorites and carry them across web, iOS and Android. Sign in with a magic-link email, Google, or Apple — no separate registration step.

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10 forecast models · observed soundings · 48 hours of runs

Pull a full sounding from any point on the map.

Click anywhere in North America and read the vertical profile from numerous models such as the HRRR, NAM, ECMWF's IFS and AIFS, ICON, UKMET, and more on the way. They include a full suite of parameters and the ability to filter by your interest such as severe, winter, fire, or aviation.

Open Soundings

Examples

A few of the things you can pull up

The full analysis column — ALL mode adds 3 km and 6 km CAPE, the effective inflow layer, storm-relative winds and streamwise-vorticity fraction by layer, profile mini-charts and layer moisture to the core parcel, stability and composite tables.

Storm-relative hodograph for Omaha with Bunkers movers, mean wind and deviant tornado motion marked — **Storm-relative hodograph** — subtract the Bunkers right-mover and read the wind profile from the storm's frame. Right and left movers, 0–6 km mean wind and deviant tornado motion are marked, with SRH and critical angle alongside.

Winter tab active: precipitation type, partial thickness, freezing-drizzle route, dendritic growth zone and lake-effect ingredients replace the convective kinematics — **Tabs for the question you're asking** — nobody needs streamwise vorticity in an ice storm. The Winter tab swaps the convective tables for precipitation type, partial thickness, the freezing-drizzle route, dendritic-growth-zone depth and ascent, snow-squall parameter and lake-effect ingredients. Fire, Heavy rain and Aviation do the same for their problems.

NAM and ICON profiles overlaid on the HRRR skew-T for Oklahoma City, paired by valid time — **Compare on one diagram** — overlay up to two more profiles: another model, another run, or the nearest rawinsonde within 250 km. Here NAM and ICON against the HRRR — always paired by valid time, never by forecast hour.

701 km HRRR cross-section from near Guymon to near Texarkana: relative-humidity fill, theta-e contours and wind barbs — **Cross-sections along any path** — click two points and get a vertical slice. Relative humidity, θe and barbs here; or switch the fill to temperature advection, frontogenesis, vorticity, divergence or potential vorticity, computed on the model grid. Zooming re-samples the visible span at finer resolution.

Time-height section at one point: relative-humidity fill with theta-e contours, wind barbs and diagnosed cloud through the full HRRR forecast — **Time-height at a point** — hold the point and cut the section through time instead: the column above one place across the whole forecast, with the same presets, fills and overlays as the spatial section.

Observed 00Z rawinsonde for Norman, Oklahoma with RAOB and aircraft sites marked across the map — **Observed soundings too** — SPC rawinsondes at 00Z and 12Z with the last five ascents per site, and MADIS aircraft profiles at about sixty airports. This Norman ascent is labelled 3 hours old — ages are always stated.

Three successive HRRR runs drawn on one skew-T for the same valid hour — **Run-to-run** — the same valid hour from successive runs on one diagram: watch the forecast converge, or not, ahead of an event.

What's in there

More details on what you can do

Ten models, one page

Hourly HRRR, plus NAM, GFS, ICON, IFS, AIFS, GraphCast and UKMET over North America, and HRRR/NAM Alaska nests. The roster is read live from what's actually published, so a stalled upstream feed drops out instead of serving stale profiles.

Point, box, path or time

A click gives the profile at that point. Drag a box and every number becomes the mean over the grid points inside it. Click two ends for a cross-section along the line, or hold one point and take the section through time.

Five analysis tabs

Convective, Winter, Fire, Heavy rain and Aviation — each shows only the quantities that answer its question, from snow growth and the freezing-drizzle route to icing, low-level wind shear and sub-cloud evaporation.

Choose the layers

Eleven section fills — relative humidity, temperature, dewpoint depression, θe, wet-bulb, wind speed, vertical velocity, temperature advection, frontogenesis, potential vorticity, divergence — with overlays for wind and ageostrophic barbs, θe and omega contours, the dendritic zone, diagnosed cloud, the 0 °C line and isotherms. Seven presets, or build your own combination.

Zoom and hover everywhere

The map, the diagrams and the sections all zoom — sections re-fetch at finer resolution as you go in. Hovering reads out values under the cursor, and every table carries a small info button explaining what the numbers are and how they're computed.

Lift it yourself

Lift a parcel from any level you click, lift a whole layer by a chosen depth, or drag the temperature and dewpoint traces directly — every card, index and the hodograph recompute live.

See Observed Data too

Rawinsondes and aircraft profiles are shown as-is with their age stated.

Two days of runs

Every run from the last 48 hours stays loadable and the run list refreshes itself every five minutes. Save exports the current diagram as a PNG.

Coverage

North America, on the models' own levels

HRRR and NAM cover the CONUS; GFS, IFS, AIFS, GraphCast, ICON and UKMET cover North America; two nests cover Alaska. Profiles are sampled from each model's own pressure-level output on a 0.5° mesh and drawn to 100 hPa — levels above that feed the stratosphere and index products instead. New forecast hours appear within seconds of the maps.

Pricing

Mostly free. Pro is $1.99 a month.

Soundings are free to use: every hour on GFS, HRRR, GEFS and NMME, and the first 48 hours on the rest. Pro adds every hour and every lens and tool on every model.

See what Pro includes

Free account

Save your views. Sync everywhere.

Create a free account to save favorites and carry them across web, iOS and Android. Sign in with a magic-link email, Google, or Apple — no separate registration step.

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20 models & ensembles · 425 products · every cycle

All of our models, in a sophisticated yet easy-to-use format

Global AIFS · AI GFS · GDPS · GFS · ICON · ECMWF · RDPS (Canadian 10 km) · UKMET

Regional HRRR · HRRR (Alaska) · NSSL MPAS-HT2 (3 km) · NAM · RRFS (3 km CONUS)

Ensemble AIFS Ensemble · AIGEFS · CMCE · GEFS · ECMWF Ensemble · NBM · REFS

Tropical HAFS, one feed for every active storm

Outlooks Nadocast · SPC/WPC

Open Models

Maps

Model data, the way you want it

Pick a base map, and add any layers you want

AIFS 500 hPa height anomaly with height contours over North America from the 06Z run of 23 September, valid 12Z Monday 5 October at F294, a ridge over the West and a deep trough over the Great Lakes — **Every setting is yours** — Example image with 500 hPa height anomalies on the AIFS model. In this case we have height lines contoured, with anomaly values labelled across the map, the min/max readout and colorbar turned on. But you can change every one of these settings to suit your needs.

HAFS storm 17E composite reflectivity with 10 m wind barbs off the Pacific coast of Mexico, valid 18Z Wednesday 23 September at F030 — **Zoom anywhere** — We've done away with most domains! Zoom in or out to your region of interest, like for this Hurricane on the HAFS model. We added the 10 m winds on top of the reflectivity, but you can add whatever layers you want to.

HRRR composite reflectivity with 10 m wind barbs over the Carolinas and the western Atlantic, valid 00Z Wednesday 23 September at F006 — **Detail when you want it** — HRRR composite reflectivity zoomed to the Carolina coast, with county lines, 10 m wind barbs and the max-in-view readout turned on. Switch the counties, barbs and readout on or off, or put a different layer in their place.

GFS precipitable water with 850 hPa streamlines over Mexico, the Gulf and the southern United States, valid 18Z Wednesday 23 September at F030, with a tropical cyclone visible off western Mexico — **Streamlines, barbs or contours** — GFS precipitable water with the 850 hPa flow drawn as streamlines and values labelled across the map. Rather see the flow as barbs? Add it as a barb layer instead, or contour another field over the top — each layer is yours to style.

HRRR Alaska total snowfall (Kuchera ratio) in inches from the 12Z run of 23 September, valid 09Z Friday 25 September at F045, with the inspector reading 0.4 in at 70.4 N, 153.9 W — **Read any value** — HRRR Alaska total snowfall using the Kuchera ratio, with the inspector turned on: hover anywhere and it reads the value under the cursor, here 0.4 in at 70.4°N, 153.9°W.

GFS 300 hPa wind speed with isotachs and wind barbs over the eastern Pacific and western North America from the 12Z run of 23 September, valid 13Z Wednesday 23 September at F001, a jet streak across the Pacific into British Columbia — **Layers that stack** — GFS 300 hPa wind speed with the isotachs contoured and wind barbs on top. Every layer has its own gear to restyle it, an opacity setting, and a switch to hide it.

Compare

Compare models and runs to see differences and trends

The full viewer with Model Comparison open: GFS 12Z F072 minus ECMWF 00Z F084, 500 hPa height with MSLP contours over North America, both valid 12Z Friday 25 September — **Model minus model** — GFS minus ECMWF on 500 hPa height, matched on valid time: the GFS 12Z at F072 against the ECMWF 00Z at F084. Pick any model and any of its runs as B; the panel spells out exactly which two frames are being differenced.

GFS 12Z 22 September minus GFS 12Z 21 September, 500 hPa height with MSLP contours, valid 12Z Friday 25 September at F072 — **Run to run** — the same model against its own earlier run for the same valid time: today's 12Z GFS minus yesterday's, so a trend is a colour instead of something you hold in your head.

Reality Check: HRRR analysis minus the GFS forecast from 18Z 21 September, 500 hPa height, valid 18Z Tuesday 22 September, with the grid of every model's forecast valid now — **Reality Check** — every model's forecast that is valid right now, in one grid, from two hours to two days old. Click a cell to map the analysis minus that forecast; here, the HRRR analysis minus the GFS run from 18Z the day before.

Dual mode: HRRR and RRFS composite reflectivity side by side over the Mid-Atlantic and the Carolinas, both from 18Z 22 September and valid 00Z Wednesday 23 September at F006 — **Dual and Quad** — two or four panes, each with its own model, run and product, with the time linked and the view in sync. Here the HRRR and the RRFS disagree about where the storms are six hours out.

Tools

Tools that work on the map

The full viewer adding a layer: REFS composite reflectivity probability of 30 dBZ from the 12Z run of 23 September, with the Add Layer dialog open to a 10 m wind streamline layer, the other layer types (barb, contour, second base map, hazard outlook) and the SPC and WPC outlook checkboxes — **Menus built for finding things** — 425 products in nine groups (Radar, Observations, Surface, Precipitation, Convection, Upper Air, Ensemble, REFS, NBM), plus Product Combos, Common, Recent and Industry shortcuts for fire weather, aviation and energy. The layer panel on the right is where barbs, contours and streamlines go on.

The viewer with its parts numbered: 1 the model and run pickers, 2 the parameter selection menus, 3 the Measure, Draw, Inspect, Chart, Sounding and Cross Section tools, 4 the time slider, playback and Save, Copy link, Dual, Quad and Location buttons, 5 the projection, search and layer panel, 6 the base map, station, values and roads settings, over an ECMWF 500 hPa 12 hour height change map — **Where everything is** — the numbers on the screenshot:
**Model and run.** Pick the model, then the run (initialisation time) you want to look at.
**Preset buttons.** Product Combos (a fill with its matching contours and barbs), Base Maps (every map, grouped by type), Saved Views, Model Comparison, Recent, Common, and Industry (fire weather, aviation and energy). The list of maps for the chosen group opens underneath.
**Map tools.** Measure a distance, Draw on the map, Inspect the value under the cursor, Chart a point through every forecast hour, or open a Sounding or a Cross Section.
**Time and toolbar.** The forecast-hour slider with play, step and playback settings; the star to save the view; Save for a PNG or a loop; Copy link; Reset; Dual and Quad panes; and Location to jump to a region.
**Overlay and Mapping.** The projection (Auto, Plate Carrée, Lambert Conformal or Polar Stereographic), a place search and named regions, and your layer stack: the base map plus every layer you add, each with its own settings gear.
**Map settings.** The base map (none, land or terrain), station labels, value labels and roads, and Map Settings for boundaries and the rest.

A Skew-T and hodograph from the HRRR at 36 N, 78.2 W beside a map of HRRR MLCAPE, valid 00Z Wednesday 23 September at F006 — **A sounding wherever you point** — turn on Sounding and the Skew-T and hodograph follow the cursor across the map, live; click to pin one. Here, the HRRR's profile over North Carolina six hours out.

A HRRR relative-humidity cross-section from Michigan to the Atlantic east of Florida, 1931 km long, drawn over the 850 hPa temperature map, valid 00Z Wednesday 23 September at F006 — **Cross-section** — click A, click B, and get the vertical slice along the line, with presets for frontogenesis, potential vorticity, moisture, wind and temperature advection, or build your own.

A time-series chart of GFS 2 m temperature at 40 N, 92.1 W, the current run drawn over the five previous runs, beside the 2 m temperature map valid 12Z Wednesday 23 September at F024 — **Chart any point** — click the map for the field's trend across every forecast hour, with the previous runs drawn behind the current one.

The draw toolbar open over a precipitation map of the Pacific Northwest, with a hand-drawn cold front, warm front and occluded front, an L low marker and the text 'Annotate your maps!', and the freehand, front, arrow, text, H/L, oval, box, line, star, colour and size buttons — **Annotate your maps** — draw cold, warm, stationary and occluded fronts, drylines, freehand lines, arrows, text, ovals, boxes, stars and H/L markers, in the colour and size you pick. Here, fronts, a low and a label sketched straight onto the map.

Keep & share

Keep it, and pass it on

Close-up of the viewer's toolbar with the Save menu open under the Save button, showing Save animation loop, Set storm track, Follow storm during play and Save storm loop, beside the Copy link, Reset, Dual, Quad and Location buttons — **Saved Views, links, images and loops** — star any view to keep its model, run, product, region and layers; drag the list into your own order. Copy link puts the whole state in the URL, Save writes a PNG of the frame, and the Save menu records the animation as an MP4 — or tracks a storm and follows it through the loop.

A saved PNG of HAFS 17E composite reflectivity at F030 with the model, product, region, run and valid time burned into its header — **What a saved image looks like** — the frame as the viewer draws it, with the model, product, region, run and valid time in the header and a file name to match: `HAFS_17E_comp_refl_20260922_1200_f030.png`.

Coverage

What we cover

North America, the Pacific and the Atlantic160°E to 10°W, 5°N to the ArcticECMWF · GFS · ICON · AIFS · ECMWF Ensemble · AIFS Ensemble

North AmericaHawaii to Greenland, the Caribbean to the ArcticGDPS · AI GFS · UKMET · GEFS · CMCE · AIGEFS · RDPS (Canada and the US)

Continental USThe lower 48 with southern Canada and northern MexicoHRRR · NSSL MPAS · NAM · RRFS · REFS · NBM · Nadocast · SPC/WPC

AlaskaAlaska, the Bering Sea and northwest CanadaHRRR (Alaska)

Every active stormA domain that follows each system, in the Atlantic, the eastern and western Pacific and the Indian OceanHAFS

Each run appears as it builds, so a forecast hour is on the map as soon as the model has published it.

Pricing

Mostly free. Pro is $1.99 a month.

Model maps are free to use, with 2 saved views. Pro adds the multi-pane and comparison tools on the seasonal models and up to 20 saved views.

See what Pro includes

Free account

One account for the whole site.

A free account carries your satellite favorites and regions across web, iOS and Android. Sign in with a magic-link email, Google, or Apple — no separate registration step. Saved Views in the model viewer are kept in the browser you made them in.

Create free account

13 models · 6 ensembles · 8 long-range families

Every model's forecast for one point on the map.

Click a point and read the whole fleet out of it — the HRRR, GFS, ECMWF's IFS and AIFS, ICON, UKMET, GraphCast and more — as a meteogram, an hourly table, a run-to-run trend, or an ensemble of about two hundred members. Temperature, QPF and snow through the medium range, the probability of a threshold being crossed, when it arrives, and the long range in the same place.

Open Meteograms

Examples

The forecast at one point

Temp, QPF and snowfall for a point in the Brooks Range of Alaska, in 12-hourly blocks with running precipitation and snow totals — **Temp · QPF · Snow** — max and min temperature, precipitation and snowfall in 6- or 12-hourly blocks with running totals underneath, out to the end of the run. The block size is yours to set; the panel refuses a cadence the model does not publish rather than inventing one.

Seven-day GFS surface meteogram for Denver: temperature, dewpoint and feels-like, wind and gusts with barbs, relative humidity and cloud, and 6-hourly QPF with a running total — **The classic meteogram** — temperature, dewpoint and feels-like over wind and gusts with barbs, relative humidity against cloud cover, and QPF with its running total. Five days, seven, ten, or the whole run.

Daily high and low temperature bars for Dallas from the ECMWF IFS, one bar per calendar day of a 15-day forecast — **Daily high and low** — one bar per calendar day, in your local day, for as far as the run goes.

Dense hour-by-hour HRRR table for Minneapolis: temperature, feels-like, dewpoint, wind at three levels, precipitation, snow and precipitation type, colour-coded — **Hourly table** — the dense text read-out: temperature, feels-like, dewpoint, wind at the surface and at 925, 850 and 700 hPa, precipitation, snow, type and thickness, colour-coded by value with run totals at the foot. Hourly, 3-hourly or 6-hourly rows, in a classic layout or the NWS grid.

Multi-run trend for Boston: eight successive GFS runs stacked as coloured rows against a common valid-time axis — **Multi-run trend** — the last several runs stacked against one valid-time axis, so a forecast that has been walking warmer for three cycles looks like it. Any variable, any of the models.

The same multi-run trend coloured by difference from the newest run rather than by value — **…and what changed** — the same stack recoloured by its difference from the newest run. A full-value palette compresses run-to-run change to nothing; this is what a trend chart is actually for.

Thermal summary for Denver: 925 and 850 hPa temperatures overlaid, three thickness panels, and 2 m temperature underneath — **Thermal summary** — the levels that are actually above ground at this point overlaid, the thicknesses of the layers they sit in, and the 2 m temperature underneath. Computed from the model's own forecast sounding column, not from a second data source.

Wet-bulb time-height section for Buffalo from the HRRR, with a hard colour break at 0 C and the -1/0/+1 C isopleths drawn over it — **Wet-bulb time-height** — where a falling hydrometeor melts, and whether it refreezes before it lands. A hard colour break at 0 °C over the boundary layer, with the −1 / 0 / +1 °C isopleths on top, so a warm nose and the cold layer under it read at a glance.

Summaries

Summary charts, organized by topic

Severe summary for Oklahoma City: supercell and significant-tornado composites, the bulk-shear ladder, storm-relative helicity and CAPE with inhibition — **Severe** — the supercell and significant-tornado composites, the 0–1 / 0–3 / 0–6 km bulk-shear ladder, storm-relative helicity, and CAPE with its inhibition. Hours inside the conventional parameter space are tinted.

Winter summary: snow-to-liquid ratio by three named methods, dendritic-growth-zone score, precipitation type and wet-bulb temperature — **Winter** — the snow-to-liquid ratio from every method that is defensible here, each named rather than blended into one number: NBM's calibrated ratio, the model's own Kuchera field, and a flat 10:1 to argue with — and a method that fails its own sanity check against this run is withheld and says so on the chart. Plus the dendritic-growth-zone score, precipitation type and the 2 m wet-bulb against freezing.

Aviation summary for Seattle: visibility with flight-category bands, sky cover by layer, low-level wind shear, icing potential and surface wind — **Aviation** — visibility with its flight-category bands, sky cover by layer, low-level wind shear, column icing potential, wind and gusts, and a thunder proxy. Where the fleet does not publish a field yet, the panel says so in as many words instead of drawing a guess.

Fire summary: Fosberg fire weather index, relative humidity, wind and gusts and temperature, with critical hours tinted — **Fire** — the Fosberg index the pipeline publishes, relative humidity, wind and gusts, and temperature, with the hours meeting the conventional critical pair (RH at or below 20 % with wind or gusts at or above 25 mph) tinted.

Hazard table: one row per hazard against forecast time, coloured only in the hours that hazard is in play — **The hazard table** — one row per hazard — wind, thunder, heavy rain, winter, fire, heat, cold, visibility, shear and icing — against forecast time, coloured only in the hours it is actually in play, on one severity scale so you can read down a column. Every cell names the published criterion it fired on.

Where the spread lives

Ensembles, probabilities and scenarios

GEFS ensemble plume for Chicago: every member's own temperature line behind the ensemble mean, with precipitation members on a second axis — **Ensemble plume** — every member's own line, two variables at once, with the mean drawn over them. Six ensembles to choose from.

Ensemble table for Chicago: one row per ECMWF EPS member, one column per forecast time, each cell coloured and numbered — **Ensemble table** — one row per member, one column per forecast time, every cell coloured and numbered. This is where you find the four members that are doing something different, by name.

Box and whisker plot of GEFS members at each forecast hour for Miami — **Box & whisker** — median, quartile box and full range at each forecast hour, when the member lines are too many to read individually.

Super ensemble plume pooling 184 members from GEFS, CMC GEPS, ECMWF EPS, AIFS-ENS and AIGEFS, each family in its own colour behind the pooled median — **Super ensemble** — pool the centres into one set and draw every member in its family's colour: GEFS (31), CMC's GEPS (21), ECMWF's EPS (50), AIFS-ENS (51) and AIGEFS (31), aligned on valid time rather than forecast hour, with the pooled median over the top. A source picker decides which feed it, and every member counts once by default — or switch to one vote per centre so ECMWF's 50 don't outvote everyone. The convection-allowing ensemble pools separately, because a 3 km member and a global member are not the same kind of thing. And CAPE, cloud and gusts are refused outright: the name means a different quantity at each centre.

Probabilities panel: shaded plume, exceedance probability curve and the empirical distribution of members at a picked valid time — **Probabilities** — one variable, in depth: the shaded plume, the probability of exceeding a threshold you set, and the empirical distribution of the members at a valid time you pick. Add a second chart to watch two variables answer the same question.

Joint probabilities: the probability that two conditions hold together, with the marginals drawn dashed behind the joint trace — **Joint probabilities** — the probability that two or three conditions hold in the same window — freezing *and* raining, or a hot night or an oppressive dewpoint — with the marginals dashed behind the joint trace. Multiplying two published probability maps assumes the fields are independent and they usually are not; this counts the members that actually satisfy the whole condition. Presets by topic, or write your own.

Time of arrival: the distribution of first-crossing times across ensemble members, with the cumulative probability of arrival by a given hour — **Time of arrival** — not whether it happens but *when*: each member's own first crossing of your condition, as the share arrived by each valid time, as arrivals per day, and as a plain count of the members that never get there this run — with the median, earliest and latest arrival stated above the chart.

Postage-stamp sheet: a small rendered map per ensemble member, side by side — **Postage stamps** — a small rendered map per member, side by side, for the question a point forecast cannot answer: is the spread about timing, or about where the thing goes.

Cluster scenarios: ensemble members grouped into a handful of representative outcomes, pooled across models — **Clusters** — the members grouped into a handful of representative scenarios, pooled across centres or clustered on one family's own members, with each scenario labelled by how much of it came from which centre — so you can see when one model is carrying a cluster on its own. Play the day slider forward, or take the loop as a video. On the sub-seasonal feeds the same machinery draws hemispheric weekly regimes at weeks 2–6.

The long range

Weeks to seasons ahead, at the same point

Seasonal series at a point: monthly values and anomalies from the ECMWF seasonal model — **Seasonal series** — the monthly and seasonal values, or anomalies against climatology, that a seasonal model forecasts for this exact point — the same guidance the maps show, reduced to the place you care about.

Weekly regime clusters from the ECMWF Extended ensemble: four hemispheric 500 hPa height patterns for week 2, each labelled with the share of the 101 members that chose it, beside the full-ensemble mean — **Weekly regimes, weeks 2–6** — on the sub-seasonal feeds the same clustering runs on hemispheric 500 hPa height rather than at your point: a handful of representative patterns for the week, each labelled with how many of the ensemble's members chose it, next to the full-ensemble mean. Step through weeks 2 to 6, or pool the centres. Eight long-range families feed this side of the page — CanSIPS, CFS and its 10-run lagged mean, ECMWF Seasonal, ECMWF Weeklies and Extended, and GEPS Extended and its weekly means, out to a year.

Which models, and what they are

The fleet

Global deterministic

GFS, ECMWF's IFS, ICON, UKMET, and the two machine-learning globals ECMWF AIFS and GraphCast — out to 15–16 days.

Convection-allowing and regional

HRRR hourly, NAM, RRFS, REFS, NSSL's 3 km MPAS, CMC's RDPS and the NBM blend. HRRR and NAM have Alaska nests, and a point inside Alaska routes to them without you asking.

Six ensembles

GEFS (31 members), ECMWF EPS (50), CMC GEPS (21), AIFS-ENS (51), AIGEFS (31), and a time-lagged CAM ensemble built from HRRR, RRFS, NAM and MPAS (16). Plumes, tables, boxes, probabilities and clusters all read the same member archive.

Eight long-range families

CanSIPS, CFS, the CFS 10-run lagged mean, ECMWF Seasonal, ECMWF Weeklies and ECMWF Extended, GEPS Extended and GEPS Weekly Means.

Pooled honestly

Surface CAPE, column CAPE and most-unstable CAPE are three different numbers that happen to share a name, so the pooled view refuses to average them — a plausible, confident, wrong product is worse than a missing one. The same discipline runs through the page: members are paired by valid time rather than forecast hour, and every pooled figure says how many members and which centres are behind it.

Nothing claimed that isn't published

Every panel is gated on evidence: a model that does not publish a field does not get that tab, a run that has not finished says so, and experimental feeds carry their source's attribution on the chart.

Working with it

More on what you can do

Pick a point, or a city

Click anywhere on the map for the forecast there, or choose from about 1,500 cities. City points come back instantly; the map is for everywhere else.

Any run, not just the newest

Step back through the recent cycles from the run list, pin one, and hide the runs that are still building if a half-finished forecast is in your way.

Set the range and the cadence

Five days, seven, ten or the whole run; hourly, 3-hourly or 6-hourly rows; 6- or 12-hour blocks — each clamped to what the model you're on actually publishes.

Hover reads the number

Every chart has a crosshair that reads the value under the cursor at that valid time, out of the array rather than off the pixels.

Share the exact view

The whole state — panel, model, run, point, variable, threshold, condition — lives in the URL, so a link reopens precisely what you were looking at.

Save what's on screen

Save the panel as an image named for its model, point and time, or export a cluster loop as an animation.

Coverage

North America and the globe, on each model's own grid

The convection-allowing and regional models cover the CONUS, with Alaska nests for HRRR and NAM that a point inside Alaska routes to automatically; the globals, the ensembles and the long-range families cover the world. Every value comes from the same published fields the map viewer draws, read at the grid cell containing your point — the panel tells you which cell that is — so a number here and the map agree by construction. New forecast hours appear as the run builds, so you can watch a cycle fill in rather than wait for it to finish.

Pricing

Mostly free. Pro is $1.99 a month.

Meteograms are free to use on every model, with 4 runs at a time and 2 saved views. Pro raises that to 12 runs and 20 saved views.

See what Pro includes

Free account

Save your views. Sync everywhere.

Create a free account to save favorites and carry them across web, iOS and Android. Sign in with a magic-link email, Google, or Apple — no separate registration step.

Create free account

Radar · single sites, MRMS mosaic, models

Radar that goes from the mosaic to the volume scan

Individual NEXRAD and TDWR radars as each tilt finishes, the MRMS national mosaic, and model fields in the same panes. Dual-polarization products, cross-sections, a 3D view and storm-signature overlays, with sites in Europe and national composites for Canada, the UK, Italy and Taiwan. Free to use, with no account needed.

Open Radar

Three ways to look

Pick a radar, the mosaic, or a model

Each pane works on its own, so you can compare a single site with the mosaic or with a forecast for the same time.

Single radar

198 US radars (157 NEXRAD and 41 TDWR, including Alaska, Hawaii, Puerto Rico, Guam and Korea). Every tilt shows as soon as it is scanned, not at the end of the volume. Velocity is dealiased, and TDWR velocity is cleaned up the same way.

MRMS mosaic

NOAA's Multi-Radar Multi-Sensor products over CONUS, Alaska, Hawaii, the Caribbean and Guam: reflectivity, MESH hail size, rotation tracks, echo tops, rain rate, QPE totals and FLASH flood guidance.

Model fields

Forecast fields as a base layer or on top of radar, matched to the radar time (at most one frame ahead). Choose colors, contours, wind barbs or animated wind particles for each layer.

Outside the US

134 European radars from 20 countries, with full dual-polarization data from Finland and Germany. Rain-rate composites for Canada, the UK and Italy, and a reflectivity composite for Taiwan. Click a composite dot to show it in the selected pane.

Examples

A few of the things you can pull up

Four panes on one storm: reflectivity, MRMS 60-minute rotation track, storm-relative velocity and correlation coefficient, with warnings and our detections drawn on each — **Four panes, one storm** — Reflectivity, storm-relative velocity, correlation coefficient and the MRMS 60-minute rotation track side by side, with the warning polygons and detection markers in every pane. The panes share one time slider, and tilt and site can be linked or independent.

3D reflectivity cores over Kansas, drawn as isosurfaces on the map — **3D view** — Storm cores as isosurfaces or a volume, built from the radar's own tilts or from the 33 MRMS heights, with an adjustable threshold and vertical stretch.

Radar map with a cross-section line A to B and the vertical slice shown in a panel — **Cross-section** — Drag a line on the map and get the vertical slice through it, here from 12 tilts down to the surface, with a selectable top height. It works on reflectivity, velocity and the dual-polarization products, and it is a quick way to see how deep a core or a rotation goes.

KFDR with six neighboring radars combined into one reflectivity picture over Oklahoma and Texas, with surface observations and warnings — **Neighbor view** — One radar plus up to seven neighbors within 400 km, each point drawn from the radar whose beam is lowest there, so a storm between two sites is no longer seen from high up. Surface observations, warnings and watches go on top. Area scan shows every radar in the view.

Storm-relative velocity with the storm motion pad open — **Storm-relative velocity** — Drag the point on the motion pad to set the storm motion, or take the echo track or a Bunkers estimate, and the velocity map updates as you drag. The same motion drives the arrival times, trends and storm-relative products.

Precipitation type radar near Salt Lake City, rain and snow in separate color ramps — **Precipitation type** — Rain, snow, mixed and freezing precipitation each in its own ramp, with reflectivity as the intensity. Useful in winter and in mountain terrain, where the type changes within a few miles. Available where MRMS precipitation type covers (CONUS).

Color table dialog listing several built-in reflectivity tables and a user-made one — **Your own color tables** — Several built-in tables per product, including a color-blind safe one, a high-contrast one and a clean one that hides weak echoes. Make your own, edit it, or import and export GRLevelX .pal files. One table per product applies in every pane, the cross-section and 3D.

Two panes over New England: KBOX reflectivity on the left, HRRR 2 m dew point on the right, with surface observations on both — **Model comparison** — radar in one pane and a model field in the next, here KBOX reflectivity beside HRRR 2 m dew point, on the same map, with the same observations drawn on both. The panes follow one time slider, with the model hour matched to the radar time. A model can also be laid over the radar in a single pane.

24-hour radar rainfall estimate — **Rainfall** — radar and multi-sensor totals from 15 minutes to 72 hours, plus FLASH flash-flood guidance ratios.

What's in there

Products, tools and detections

Dual-polarization

Reflectivity, velocity, spectrum width, correlation coefficient, differential reflectivity and specific differential phase, plus derived rain rate, hail size and hail differential reflectivity. Choose from several color tables or edit your own.

Rotation

Storm-relative velocity with a drag pad to set the storm motion, azimuthal shear, normalized rotation, and a vortex readout with the rotation's depth through the volume.

Hail and storm structure

MESH and probability of severe hail, VIL and VIL density, echo tops, composite reflectivity, ZDR column depth, and KDP above the freezing level.

Storm-signature overlays

NWS storm tracks, mesocyclone and tornado-vortex detections, plus our own overlays for tornadic debris, ZDR columns, KDP cores, hail growth trends, QLCS vortices, downburst signatures and heavy-rain cores. Each follows a published method and the popup says which and what threshold we use.

Warnings and context

NWS warnings and watches (toggle by type), SPC outlooks and mesoscale discussions, WPC excessive rainfall, local storm reports, METARs and GLM lightning, with arrival-time estimates for towns in a storm's path.

Tools

Measure, draw with a full set of colors, find a location, and read values by hovering. Loop 5 minutes to 1 hour, choose the frame count, spacing, speed and pause, or rock back and forth. Save a PNG, GIF or MP4 video, copy a link to your exact view, and keep saved views and your color tables in your browser.

Layout

One, two or four panes on desktop and two on phones. Panes can follow the same time, tilt and site or each run independently.

Data notes

Each source's credit and licence is shown in the title bar. Detections are guidance from automated algorithms, not warnings; use the NWS for official products.

Pricing

Mostly free. Pro is $1.99 a month.

Radar is free for everyone, no account needed. Pro ($1.99 a month or $19.99 a year) unlocks the premium features on the model tabs.

See what Pro includes

Free account

Save your views. Sync everywhere.

Create a free account to save favorites and carry them across web, iOS and Android. Sign in with a magic-link email, Google, or Apple — no separate registration step.

Create free account

Every basin · ensemble guidance

Tropical Cyclones: Storm Tracks, Model Guidance & Intensity

Every active storm and model-tracked low across the Atlantic, East, Central and West Pacific, with ensemble track density, intensity spread and the season's ACE against climatology.

Open Tropical

Examples

A few of the things you can pull up

Ensemble track density for a hurricane — **Track density** — the chance the centre passes within 150 km, from every ensemble member, with the centre track and the HAFS-A track on top.

Central pressure by ensemble through forecast time — **Intensity** — central pressure by ensemble: median member, middle half, full range and deepest member, against the latest advisory.

Season ACE compared with climatology — **Season ACE** — accumulated cyclone energy to date for each basin, against the 1971–2025 average and range.

What's in there

More than a cone

Active storms

NHC and JTWC systems with category, winds and pressure, plus a link to the official advisory.

Model-tracked lows

Lows the ensembles are following, and possible new storms over the next 10 days with the share of members that form them.

Ensemble tracks

ECMWF EPS and CMC GEPS members as track density or intensity spaghetti, stepped through forecast time.

Intensity panels

Central pressure, member support, position spread, deepest member and motion speed for every tracked system.

All systems, animated

Every ensemble track in every basin, animated through forecast time and coloured by intensity.

Pricing

Mostly free. Pro is $1.99 a month.

Tropical is free to use. Pro adds every system with all ensemble members, and intensity spaghetti.

See what Pro includes

Free account

Save your views. Sync everywhere.

Create a free account to save favorites and carry them across web, iOS and Android. Sign in with a magic-link email, Google, or Apple — no separate registration step.

Create free account

National Water Model · every basin

River & Basin Forecasts, from rain to rivers

Which basins are about to get soaked, and what the rivers do next. Model rainfall averaged over every US basin, checked against flash flood guidance, with the National Water Model's flow on 347,000 river reaches and live NWS gauges in flood.

Open River

Examples

A few of the things you can pull up

Basin-average rain by ensemble member and rain per 6 hours against flash flood guidance — **Any basin, one click** — running basin-average rain from every GEFS member, the 6-hour totals against the NWS flash flood guidance, and the river at the basin outlet.

Small watersheds across Florida shaded by chance of heavy rain — **Zoom to small watersheds** — 222 large basins nationally, splitting into thousands of small ones as you zoom in.

HRRR 24-hour basin rain across the US — **Every model** — basin rain from GEFS, GFS, HRRR, NAM and more, with a side-by-side table for any basin showing whether the models agree.

What's in there

Rain, basins and rivers in one place

River rise

National Water Model flow on every reach, shown as how far above its usual level each river is heading, hour by hour.

Basin rainfall

Chance of more than ½, 1, 2 or 3 inches over each basin from GEFS, GFS, HRRR, NAM and more, over 24 or 72 hours.

Flash flood guidance

Where forecast rain is closing in on the NWS River Forecast Centers' flash flood guidance.

Rain on snow

Basins where rain is forecast to fall on snowpack, from the NOAA snow analysis.

Gauges in flood

Live NWS river gauges at or above flood stage, right on the map.

Pricing

Mostly free. Pro is $1.99 a month.

River is free with GEFS, GFS, HRRR and NAM. Pro adds every other model, longer forecast windows and the 10-day National Water Model.

See what Pro includes

Free account

Save your views. Sync everywhere.

Create a free account to save favorites and carry them across web, iOS and Android. Sign in with a magic-link email, Google, or Apple — no separate registration step.

Create free account

Forecaster tools · pressure gradients

Forecaster Tools, built for specific problems

Station-to-station pressure gradients, observed and forecast on one chart. Pick a gap wind, a marine push or a Santa Ana pair and see where it stands now, where each model takes it next, and how well each model has called it.

Open Tools

Examples

A few of the things you can pull up

Gradient trend: 48 hours observed, then the HRRR, RRFS and GFS forecasts — **Observed, then forecast** — the last 48 hours of the observed gradient on the same axis as each model's next hours, so you can see which run is tracking reality.

Map of the Pacific Northwest with HRRR analysis isobars and the Astoria to Portland pair drawn as a dashed line — **The pair on the map** — 1 or 2 hPa isobars from the HRRR analysis, then each model's forecast as you move the slider.

Neighbouring station pairs with observed gradients and 24-hour sparklines — **The whole neighbourhood** — nearby pairs side by side with their trend and when each peaks.

Typical miss by lead time for HRRR, RRFS and GFS on one station pair — **How the models have done** — every run scored against the observed gradient over the last 7 days, by lead time, with its bias.

Sea-level pressure at Astoria, observed against several recent HRRR and GFS runs — **Station pressure vs every recent run** — one station's observed pressure against the last several runs of each model, so you can see how each run's past hours landed.

What's in there

The numbers a forecaster checks, in one place

Preset pairs

Ready-made station pairs across 16 regions and 273 stations, from the Columbia Gorge to the Great Lakes and Alaska.

Like for like

Both sides use the altimeter setting, so observed and forecast are the same quantity, with no sea-level reduction differences.

13 models

HRRR, RRFS, GFS, ECMWF, ICON, UKMET, the Canadian models, AIFS and more, each run side by side with the observations.

Map and loop

The selected pair on a map with analysis isobars, a time slider from the observed past into the forecast, and save as an image or a loop.

Station pressure tables

1, 3, 6 and 24-hour pressure change at every station in the region, from the latest METARs.

Pricing

Tools are free.

Every tool, every model and every region, no account needed.

Open Tools

Free account

Save your views. Sync everywhere.

Create a free account to save favorites and carry them across web, iOS and Android. Sign in with a magic-link email, Google, or Apple — no separate registration step.

Create free account

Explore All We Have to Offer

Fast and sharp on any device

Layer the weather

Zoom from disk to street

Compare side by side

The full picture, in one place

Every band, every domain

Severe weather, layered

Radar & lightning

Model & surface data

Analysis tools

Favorites & sync

Tools for real analysis

From the whole hemisphere to your local area

Full Disk

CONUS

Mesoscale

Regional & local

Built on our servers, light on your device

Calibrate

Composite & project

Layer & serve

Start free. Upgrade to Pro anytime.

Free

Pro

Pro+

Save your views. Sync everywhere.

Ready to get started?

A few of the things you can pull up

Built for the long range

Temperature & precipitation

Heights & pressure

Wind

Compare them

Animate & save

Global, with the regions you actually work in

Mostly free. Pro is $1.99 a month.

Save your views. Sync everywhere.

A few of the things you can pull up

More than a pretty map

Six analyses

Change over time

Indices, live

Basins & poles

Animate & save

The whole ocean, every day

Mostly free. Pro is $1.99 a month.

Save your views. Sync everywhere.

A few of the things you can pull up

An honest scoreboard

Hourly error maps

Lead-time slider

Live zoom, live stats

Point trends

Valid-hour rewind

Share & save

CONUS, hourly, about an hour behind real time

Mostly free. Pro is $1.99 a month.

Save your views. Sync everywhere.

A few of the things you can pull up

The whole pattern toolkit

26 daily indices

Model forecasts appended

Ensemble plumes

MJO, three ways

Hovmöllers

Stack, share, save

Computed here, every day, from primary data

Mostly free. Pro is $1.99 a month.

Save your views. Sync everywhere.

A few of the things you can pull up

More details on what you can do

Ten models, one page

Point, box, path or time

Five analysis tabs

Choose the layers

Zoom and hover everywhere

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Two days of runs