Data Source Attribution

The particular web, desktop, mobile application, or API to be provided by Whether or Knot LLC, d/b/a AerisWeather (“AW”) to each AW customer may include multiple data sources to fulfill a given request.

Data Sources

Environment Canada

Canadian alerts, radar, snow depth, and forecasts may utilize information provided by EC and distributed as a value-added service under the terms of conditions of the following license:

UK Met Office

United Kingdom radar may utilize information provided by the UK Met Office and contains public sector information licensed under the Open Government Licence.


European alerts utilize information from MeteoAlarm.

University of Wisconsin-Madison

Global satellite information may utilize information from the University of Wisconsin-Madison.

NOAA CoastWatch/OceanWatch

Sea Surface Temperatures may utilize information from the NOAA CoastWatch / OceanWatch, including data from the NOAA Geo-Polar Blended Global SST Analysis.

NOAA WaveWatch

Wave heights and other wave data sets may utilize information from NOAA WaveWatch.

Japanese Meteorology Agency (JMA)

 Japanese radar information may utilize information from the Japanese Meteorology Agency (JMA).

Australian Bureau of Meteorology

Australian radar, weather observations, forecasts, and other information may utilize information provided by the Australian Bureau of Meteorology and distributed as a value-added service under the terms and conditions of the following license:

Copernicus Atmosphere Monitoring System (CAMS)

Air quality forecast contains direct and modified information from Copernicus Atmosphere Monitoring System operated by European Centre for Medium-Range Weather Forecasts ("ECMWF").

Deutscher Wetterdienst (DWD)

European radar and forecasts may utilize information provided by the German Met Office, known as Deutscher Wetterdienst (DWD).

Advanced Hydrologic Prediction Service (AHPS)

River gauge information and the US accumulated precipitation data utilizes data from the Advanced Hydrologic Prediction Service (AHPS).


Air quality observations and forecast information from AirNow, operated by the US Environmental Protection Agency (EPA).


Air quality observation information from  Data license:

Taiwan Air Quality Monitoring Network

Air quality observations from Taiwan Open Data

Drought Monitor Services

The Drought Monitor products utilize data from the National Drought Mitigation Center (NDMC), the U.S. Department of Agriculture (USDA) and the National Oceanic and Atmospheric Administration (NOAA).

National Operational Hydrologic Remote Sensing Center

USA high-resolution snow depth information utilizes data from the National Operational Hydrologic Remote Sensing Center:

National Operational Hydrologic Remote Sensing Center. 2004. Snow Data Assimilation System (SNODAS) Data Products at NSIDC.
Boulder, Colorado USA: National Snow and Ice Data Center.

Vaisala xWeather

Vaisala Xweather provides the following data:

  • Lighting strike, pulse, and flash feeds
  • Lighting threats
  • Global and regional Air Quality data sets
  • Road Weather Nowcast and Forecasts
  • Global models utilized within conditions, forecasts
  • European Radar


Administrative Unit Boundaries from Eurostat utilized for alert boundaries within Europe.

Eurostat Copyright Notice:

Copyright notice

When data downloaded from this page is used in any printed or electronic publication, in addition to any other provisions applicable to the whole Eurostat website, data source will have to be acknowledged in the legend of the map and in the introductory page of the publication with the following copyright notice:

EN: © EuroGeographics for the administrative boundaries
FR: © EuroGeographics pour les limites administratives
DE: © EuroGeographics bezüglich der Verwaltungsgrenzen