Last updated: October 17, 2026.
The short version
This app has no accounts, no ads and no tracking. It does not collect, sell or share personal information.
What the app uses
- The location you choose. When you click the map, search for a place or type coordinates, that latitude and longitude are sent to the app's server and on to NASA POWER to fetch weather history for that point. Your device's own location is only read if you tap “Use my location”, and it is then used exactly like a place you picked.
- Share links. If you use the Share button, the link contains the location you were viewing so the other person sees the same outlook.
- Place searches. The text you type into the search box is sent to OpenStreetMap's Nominatim service to find matching places.
- Map images. Map tiles are loaded from a map provider (OpenStreetMap or a commercial map service), which, like any website, sees your IP address and the area of map you are viewing.
- Your settings. Your last location, saved places and slider settings are saved in your own browser's storage on your device so the app opens where you left off. They are not sent anywhere else, and clearing your browser data removes them.
What the app's server keeps
The server stores downloaded weather history by map coordinates so repeat requests are fast. These files contain weather data only and are not linked to any person or device.
Data sources
Weather history comes from NASA POWER; ENSO records from the NOAA Climate Prediction Center; tornado records from the NOAA Storm Prediction Center; hurricane records from the NOAA National Hurricane Center; and ocean temperatures from NOAA OISST via NOAA CoastWatch. Each has its own privacy policy covering requests made to it.
Not a warning service
ENSO Atlas is a statistical guide based on past weather. It does not provide forecasts of individual storms, watches or warnings. Follow the National Weather Service and local emergency alerts for your safety.
Children
The app is suitable for general audiences and does not knowingly collect information from anyone, including children.
Changes and contact
If this policy changes, the date above will be updated. Questions: ensoatlaswx@gmail.com. See also the Terms of Use.