Where our weather data comes from
OLWeather shows what its providers return, credits them, and says so when data is missing. It does not invent numbers.
Current conditions and forecasts
Current conditions and forecasts on this website come from WeatherAPI.com. The app also uses MET Norway data for supplementary forecasts. These are model-based forecasts for a point on the map, combined with observations where available, not measurements taken on your street.
Official warnings
Official warnings are shown as returned by the issuing authority: NDMA SACHET in India, the National Weather Service (NOAA) in the United States, and MET Norway alerts where available. They are credited to the authority and are not an OLWeather safety determination.
Other public data in the app
The app can also show earthquakes from the US Geological Survey, wildfire detections from NASA FIRMS, avalanche danger for the United States from Avalanche.org, air quality from OpenAQ, and map tiles from CARTO. The full list is in the Privacy Policy.
How fresh is it?
Each reading shows when it was observed or issued. Providers update at different rates, from minutes to hours, and a feed can be delayed or briefly unavailable. When data cannot be loaded, OLWeather shows an unavailable state instead of guessing.
Limits of a point forecast
A forecast for a point is an estimate for a small grid area. Hills, coasts, cities and water can make conditions differ within a few kilometres, and showers and thunderstorms are especially local. Use the forecast as a guide and check the sky and the official warnings before safety-critical decisions.
Found something wrong?
If data looks wrong for your location, contact us with the place and what you saw. For how our planning screens use these values, see how OLWeather calculates.