KNOW WHERE YOUR WEATHER COMES FROM

Clear sources. Clear limitations.

Forecast coverage and official warning coverage are different. Every connection is described here.

On-demand browser location lookup

BigDataCloud

Data: City and country from device location

Coverage: Worldwide; device permission required

Freshness: Only after the visitor clicks Use my location. No automatic or batch lookups.

Free client-side endpoint: current device coordinates only, requested directly from the same browser. See fair-use and privacy policies.

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U.S. warning provider

National Weather Service

Data: Official warnings

Coverage: United States and areas served by NWS

Freshness: On-demand refresh, 2-minute application cache. Source timestamps are retained.

Open U.S. government data. Issuing authority is shown on every warning.

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Open-access development endpoint

Open-Meteo

Data: Current modeled conditions, hourly and 10-day forecasts

Coverage: Worldwide model coverage

Freshness: 10-minute application cache; model update cycles vary. Retrieval time is not model-run time.

CC BY 4.0 data attribution. The free hosted API is for non-commercial use; a commercial API plan is needed before monetization.

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Public country feeds connected

MeteoAlarm / EUMETNET

Data: Official European warnings

Coverage: Participating national services; coverage depends on country and available messages. Albania is not in the MeteoAlarm feed.

Freshness: 10-minute application cache from public MeteoAlarm JSON country feeds.

CC BY 4.0; retain national issuer and source attribution. Public JSON feeds at feeds.meteoalarm.org are used without a token. An approved EDR token, if configured, is used instead.

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Location search and curated city records

GeoNames via Open-Meteo

Data: Place names, coordinates, timezones and administrative areas

Coverage: Worldwide; postal-code support varies by country

Freshness: Search responses cached for one day. Curated locations are deliberately imported.

GeoNames attribution through Open-Meteo geocoding. Review provider terms for the intended usage.

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Air-quality model data

CAMS via Open-Meteo

Data: European AQI, U.S. AQI and PM2.5

Coverage: Global and regional atmospheric models

Freshness: One-hour application cache. Models and underlying data update on separate schedules.

Attribution to the Copernicus Atmosphere Monitoring Service and Open-Meteo.

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Interactive basemap

OpenFreeMap / OpenStreetMap

Data: Geographic context and place labels; no weather observations

Coverage: Worldwide

Freshness: Map provider dependent

Map attribution is displayed in the map. OpenFreeMap powers vector maps; OpenStreetMap provides the fallback raster tiles. Respect OSM tile usage limits and use a suitable commercial or self-hosted provider at scale.

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U.S. composite radar tiles

Iowa Environmental Mesonet / NWS radar

Data: National Weather Service composite reflectivity

Coverage: United States radar coverage; not a worldwide radar

Freshness: Tile provider dependent. Radar is a recent observation, not a live camera and not a forecast.

Radar tiles are served by the Iowa Environmental Mesonet from National Weather Service radar. Attribution stays on the map. This is not a substitute for weather.gov products.

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Connected means the provider has been configured, not that every request will succeed. Warning pages show actual fetch status. No invented weather values are used.