About Weather Alerts Map

Weather Alerts Map shows every active National Weather Service alert in the United States on one fast map, with a page for each alert type, state, county and major city. We built it because official alert information is spread across many pages and is hard to read on a phone during a storm.

Data sources

• Active alerts: the National Weather Service API. Lists on this site refresh every hour; the live map reads the NWS directly when you open it.
• Alert history 2016–2026: the Iowa Environmental Mesonet archive of NWS watches, warnings and advisories. County counts include alerts issued for the county or the forecast zones inside it, matched by name, so a small number of zone alerts may not be counted.
• Tornado history: the NOAA Storm Prediction Center severe weather database, 1950–2025.
• Counties, cities and population: US Census Bureau gazetteer files and 2024 population estimates.
• Base map: OpenFreeMap with data from OpenStreetMap contributors.

Not an official source

We are independent and not affiliated with NOAA or the National Weather Service. Alerts can be delayed or incomplete. Always follow official warnings, Wireless Emergency Alerts, NOAA Weather Radio and local emergency officials.

Contact

Questions or corrections: hello@weatheralertsmap.com.