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Stratus Radar

Data Credits

Last updated: October 4, 2026 · The sources in the app and in videos made with it

Weather radar also shows birds, insects, ground clutter and interference. The app's Cross-check shows other measurements for any point.

Stratus Radar is not affiliated with or endorsed by any data provider. Every map in it is public data that Stratus Radar has processed: reprojected onto the globe, recoloured to its own colour scales, and for some sources averaged, filtered or converted, as noted below. Nothing in the app is the original, unaltered data of any provider. No provider's logo is used.

The app shows a short credit on the map and the full text below in Settings › Data sources & credits. Every frame of a video made with Studio carries a short credit strip ending with swapwidget.com/stratusradar/credits.html. When a clip contains data from Taiwan, Singapore or MetService, their full text also appears on a credits card in the video.

In the credits, {year} stands for the year of the data shown, and {YYYY-MM-DD} for the day our server fetched the image.

1 Live rain (satellite)

NOAA/NESDIS Enterprise Rain Rate

Satellite rain: NOAA/NESDIS Enterprise Rain Rate, a blend of GOES-19, GOES-18, Himawari-9, Meteosat-10 and Meteosat-9 estimates, via NOAA Open Data Dissemination (registry.opendata.aws/noaa-ghe). Averaged, recoloured and combined with NOAA CPC CMORPH2 beyond 60° by Stratus Radar: not original NOAA data and not endorsed by NOAA. Contains modified EUMETSAT Meteosat data {year}. Himawari-9 data: Japan Meteorological Agency. NOAA data are not subject to U.S. copyright.

Short credit: Satellite rain: NOAA/NESDIS (processed) · Meteosat: EUMETSAT · Himawari: JMA. Terms: NOAA Open Data Dissemination. A satellite estimate, not radar.

NOAA CPC CMORPH2 (beyond 60° north and south)

Satellite rain: NOAA CPC CMORPH2 (processed; not subject to U.S. copyright)

Shown as precipitation (rain or snow). Source: NOAA Climate Prediction Center; terms: NOAA National Weather Service (public domain).

NASA GPM IMERG (when our server is unavailable, and its own layer)

Rainfall: NASA GPM IMERG (GPM IMERG Early/Final Precipitation L3 Half Hourly 0.1 degree V07, NASA GSFC and GES DISC)

Layer "Rainfall (NASA IMERG, about 6 h old)", via NASA GIBS. Source: NASA GPM; terms: NASA open data.

2 Ground radar

Japan's and Singapore's rain-rate classes are shown as estimated reflectivity (dBZ). Weak echoes below 7 dBZ are removed in Europe and Canada.

United States: NOAA NEXRAD via the Iowa Environmental Mesonet

Radar: NOAA/IEM (US radar: NOAA NEXRAD via Iowa Environmental Mesonet, Iowa State University)

Live radar and history since 2011, recoloured; not original NOAA data. Source: Iowa Environmental Mesonet (public domain).

United States: NOAA NEXRAD Level III echo classification (Radar oddities)

Echo classes: NOAA NEXRAD Level III hydrometeor classification, via NOAA Open Data on AWS

Each radar's own classification of its lowest scan (birds and insects, ground clutter and anomalous propagation, unclassified and range-folded echoes), drawn over the radar since March 2020; the labels' reasons (sun, season, the GFS temperature inversion) are worked out by the app. Source: NOAA NEXRAD on AWS (public domain).

Germany: Deutscher Wetterdienst (DWD)

Datenbasis: Deutscher Wetterdienst, Farben angepasst (CC BY 4.0)

Datenbasis: Deutscher Wetterdienst, Rasterdaten bildlich wiedergegeben / Farben angepasst (4×4-Maximum, umprojiziert); CC BY 4.0

Datenbasis: Deutscher Wetterdienst, Werte in Reflektivität umgerechnet (RADOLAN YW)

Live radar; history (4×4 maximum, reprojected); and past days estimated from the RADOLAN YW rain amounts, labelled "estimated". Licence: CC BY 4.0; dwd.de/copyright.

Japan: Japan Meteorological Agency (JMA)

出典:気象庁ホームページ(https://www.jma.go.jp/bosai/nowc/)「高解像度降水ナウキャスト」(気象庁)を加工して作成

Based on JMA's High-resolution Precipitation Nowcasts, edited by Stratus Radar; rain-rate classes shown as estimated dBZ. Analysis frames only, no JMA forecasts. Terms: JMA website terms of use (Public Data License 1.0).

Europe: EUMETNET OPERA

Radar Europe: EUMETNET OPERA (CIRRUS composite by Météo-France; contains data from 24 European national meteorological services), via EUMETNET Open Radar Data https://eumetnet.github.io/openradardata-documentation/ — CC BY 4.0 https://creativecommons.org/licenses/by/4.0/ — reprojected, weak echoes below 7 dBZ removed, recoloured by Stratus Radar.

Source: EUMETNET Open Radar Data; licence: CC BY 4.0.

Canada: Environment and Climate Change Canada (ECCC)

Data Source: Environment and Climate Change Canada and NOAA (North American radar composite, 1 km; reflectivity from the analysis (t+0) frame of ECCC's radar extrapolation) — ECCC Data Services End-use Licence https://eccc-msc.github.io/open-data/licence/readme_en/ — reprojected and recoloured by Stratus Radar.

Licence: ECCC Data Services End-use Licence.

Taiwan: Central Weather Administration (CWA)

Central Weather Administration {year} Radar composite reflectivity O-A0059-001. The Open Data is made available to the public under the Open Government Data License, User can make use of it when complying to the condition and obligation of its terms. https://data.gov.tw/license (reprojected and recoloured by Stratus Radar)

Licence: Open Government Data License, version 1.0. This text appears in full on the map and in every video that shows Taiwan.

Singapore: National Environment Agency (NEA)

Contains information from Weather Radar Images accessed on {YYYY-MM-DD} from data.gov.sg which is made available under the terms of the Singapore Open Data Licence version 1.0 https://data.gov.sg/open-data-licence

Rain-intensity classes shown as estimated dBZ. Licence: Singapore Open Data Licence version 1.0. This text appears in full in every video that shows Singapore, once for each fetch date.

Radar sites (United States)

Radar sites: NOAA NCEI (NEXRAD and TDWR station list, public domain)

Used for the Radar sites overlay and the beam height. Source: NOAA NCEI.

3 Satellite pictures

GOES-East and GOES-West (NOAA)

GOES imagery: NOAA (GOES-East and GOES-West, via NASA GIBS)

Recoloured by Stratus Radar; not the original data. Source: NOAA GOES.

GeoColor (CIRA/NOAA)

GeoColor: CIRA/NOAA (GOES-East and GOES-West GeoColor imagery via NASA GIBS; the city lights on its night side are a static background)

GeoColor imagery for information only (not for operational or emergency use)

Source: NOAA STAR.

Himawari-9 (JMA)

Himawari-9 imagery: JMA (Japan Meteorological Agency, via NOAA and NASA GIBS; temperatures recalibrated by Stratus Radar, not the original data)

Processed Himawari True Color Reproduction: JMA (Source: JMA website (processed); TCR: JMA, NOAA/NESDIS, CSU/CIRA)

Infrared via NASA GIBS; colour pictures from the JMA website, edited by Stratus Radar. Source: JMA True Color Reproduction.

Meteosat (EUMETSAT)

Contains modified EUMETSAT Meteosat data {year}

Contains modified EUMETSAT Meteosat product {year}

Data: Meteosat-12 and Meteosat-9 IODC infrared, MTG GeoColour (with a NASA Black Marble night background), Meteosat-9 IODC natural colour, fog and low cloud, dust, water vapour and the MTG Lightning Imager. Products: cloud-top height and Rapidly Developing Thunderstorms. All via EUMETView. Licence: CC BY 4.0; EUMETSAT Data Policy.

NWC SAF (storm cells)

NWC SAF (EUMETSAT Satellite Application Facility on Support to Nowcasting and Very Short Range Forecasting; SAF Host: AEMET, with the NWC SAF Cooperating Entities and EUMETSAT; Rapidly Developing Thunderstorms made by EUMETSAT with the NWC SAF software)

Not official warnings. Source: NWC SAF.

Water vapour mosaic (NOAA/NESDIS GMGSI)

NOAA/NESDIS GMGSI (Global Mosaic of Geostationary Satellite Imagery, water vapour, via NOAA nowCOAST; processed; includes EUMETSAT and JMA data)

Source: NOAA nowCOAST.

VIIRS true colour and night view (NASA/NOAA)

Satellite true color: NASA/NOAA VIIRS (NOAA-21, via NASA GIBS)

Night view: VIIRS Day/Night Band (NOAA-20, NASA/NOAA)

Source: NASA Earthdata VIIRS.

Night lights (NASA Black Marble)

Night lights: NASA Black Marble (VIIRS VJ146A2/VNP46A2 gap-filled, lunar-BRDF-corrected night lights from NOAA-20 or Suomi NPP)

Source: NASA Black Marble.

4 Forecasts

Forecasts are model output, labelled as forecasts, not observations.

NOAA GFS

Forecast: NOAA GFS (public domain)

Wind, temperature, rain and snow, clouds, gusts, pressure, thunderstorm energy and precipitation type. Source: NOAA GFS.

NOAA HRRR (United States)

Forecast: NOAA/NCEP HRRR (processed by Stratus Radar; not subject to U.S. copyright)

Radar forecast, smoke, visibility and the US detail in the GFS layers. Source: NOAA HRRR.

NOAA GFS-Wave

Waves: NOAA NCEP GFS-Wave (public domain)

Source: NOAA NCEP.

Air quality: NOAA GEFS-Aerosols

Air quality: NOAA/NCEP GEFS-Aerosols forecast (processed by Stratus Radar; not unaltered NOAA data; not subject to U.S. copyright)

PM2.5, PM10 particles, dust and smoke. A model forecast, not an official air quality index. Source: NOAA Open Data Dissemination.

UV index: NOAA Climate Prediction Center

UV Index: NOAA/NWS Climate Prediction Center (processed; not subject to U.S. copyright)

Source: NOAA CPC.

Aurora: NOAA Space Weather Prediction Center

Aurora forecast: NOAA Space Weather Prediction Center OVATION model (public domain)

Source: NOAA SWPC.

5 Warnings, lightning, fires, quakes and storms

US warnings: NOAA National Weather Service

Warnings: NOAA National Weather Service (public domain)

Not an official warning; check weather.gov.

Warnings of other countries

Data Source: Environment and Climate Change Canada

Quelle: Deutscher Wetterdienst · © GeoBasis-DE / BKG (CC BY 4.0)

Data from MET Norway (NLOD 2.0 / CC BY 4.0)

Källa: SMHI

出典:気象庁ホームページ · 国土地理院

출처: 기상청 (KMA)

This information is made freely available by MetService. Despite this, MetService is not associated with, and does not endorse, Stratus Radar.

Warning text is shown word for word, in the language the service sends, with its link. German district outlines carry BKG's copyright notice exactly as supplied with the data. JMA's municipal outlines are from the Geospatial Information Authority of Japan (国土地理院). Licences: ECCC, DWD, MET Norway (NLOD 2.0 / CC BY 4.0), SMHI (CC BY 4.0), JMA (Public Data License 1.0), KMA (KOGL Type 1), MetService (CC BY 4.0).

MeteoAlarm and the Met Office (text only)

EUMETNET – MeteoAlarm

Listed in the app with the issuing service's name, the issue time, a link to meteoalarm.org and MeteoAlarm's disclaimer word for word. Met Office warnings are shown as provided, with a link to each warning on metoffice.gov.uk. Neither appears in videos.

Lightning

Lightning: NOAA nowCOAST lightning strike density (NWS Ocean Prediction Center)

Europe and Africa: Meteosat's MTG Lightning Imager (see Meteosat above). Not for lightning safety. Source: NOAA nowCOAST.

Wildfires: NASA FIRMS

Fire detections: NASA FIRMS (VIIRS 375 m active fires from NOAA-21, NOAA-20 and Suomi NPP)

Fire data provided as is (not advised for tactical decisions or local conditions; LANCE disclaimer)

Not for evacuation decisions. Source: NASA FIRMS; LANCE disclaimer.

Earthquakes: USGS

Earthquakes: U.S. Geological Survey (USGS) Earthquake Hazards Program, public domain

Source: USGS.

Tropical storms: GDACS

Tropical cyclones: GDACS (Global Disaster Alert and Coordination System, European Commission JRC and UN OCHA, www.gdacs.org), based on warning-centre advisories (NOAA NHC/CPHC, JTWC); © European Union, licensed under CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/); tracks and cones redrawn

Not an official forecast. Licence: CC BY 4.0.

Weather stations: NOAA Aviation Weather Center

Station observations: NOAA Aviation Weather Center (METAR)

Reports outside the US come from other countries through the WMO exchange. Source: aviationweather.gov.

6 Base map, sea and labels

NASA GIBS

Imagery: NASA GIBS (We acknowledge the use of imagery provided by services from NASA's Global Imagery Browse Services (GIBS), part of NASA's Earth Science Data and Information System (ESDIS))

Base map: NASA Blue Marble, city lights (NASA GIBS)

Source: NASA GIBS.

Close-up aerial imagery (United States)

Aerial imagery (US): USGS The National Map, USDA NAIP

Source: USGS The National Map (public domain).

Borders and labels: OpenStreetMap

Labels and borders: © OpenStreetMap contributors (ODbL), via NASA GIBS

Licence: openstreetmap.org/copyright.

Sea temperature and sea ice: GHRSST MUR

Sea temperature: GHRSST MUR v4.1 (NASA/JPL, GHRSST Level 4 MUR Global Foundation Sea Surface Temperature Analysis, PO.DAAC)

Sea ice: GHRSST MUR v4.1 (NASA/JPL, sea ice fraction of the GHRSST Level 4 MUR Global Foundation Sea Surface Temperature Analysis, PO.DAAC)

Source: doi.org/10.5067/GHGMR-4FJ04.

Country outlines for the radar networks

Made with Natural Earth.

Decides which radar network draws where they overlap. Source: naturalearthdata.com (public domain).

7 Notices

U.S. Government material (17 U.S.C. § 403): the data from NOAA (National Weather Service, NCEP, CPC, NESDIS, SWPC), NASA and USGS in this app, such as the NEXRAD radar, the GFS, HRRR, wave and air quality forecasts, the UV index, satellite imagery and rain estimates, US warnings, lightning, aurora, fires and earthquakes, are works of the U.S. Government and are not subject to copyright protection in the United States. The app shows them as processed by Stratus Radar, not as official government information.

Stratus Radar is not affiliated with or endorsed by NOAA, NASA, USGS, EUMETSAT, EUMETNET, JMA, DWD, Iowa State University, Colorado State University (CIRA), the NWC SAF consortium, the European Commission, Environment and Climate Change Canada, Taiwan's Central Weather Administration, Singapore's National Environment Agency, MeteoAlarm and its weather services, the Met Office, MET Norway, SMHI, KMA, MetService or any government agency. Their names belong to them.

Measurements from public data. They can be wrong, late or incomplete. For decisions where safety depends on it, follow your official weather service.