Alert archive / Tornado Warnings

Tornado Warnings in the United States, 2021

2,445 tornado warnings in 2021. Each alert counts once, however many counties it covered. The archive of tornado warnings reaches back to 1986.

Tornado Warnings by state

Each state shaded by its count. Tap a state for its own archive.

AKMEVTNHWAIDMTNDMNILWIMINYRIMAORNVWYSDIAINOHPANJCTCAUTCONEMOKYWVVAMDDEAZNMKSARTNNCSCDCOKLAMSALGAHITXFLPR
Tornado Warnings
2,445
Busiest month
May410 tornado warnings
Busiest day
December 11, 2021147 tornado warnings

Over time

By month

By state

Every state and territory, with the alerts that covered any part of it. Each state’s page lists every one of them.

3 more states

The busiest days

Days with the most alerts issued, by UTC date.

  1. December 11, 2021147tornado warnings
  2. March 17, 202184tornado warnings
  3. August 17, 202165tornado warnings
  4. December 15, 202158tornado warnings
  5. September 1, 202156tornado warnings
  6. June 26, 202154tornado warnings
  7. May 4, 202151tornado warnings
  8. March 25, 202148tornado warnings
  9. June 19, 202146tornado warnings
  10. March 28, 202144tornado warnings
  11. May 3, 202143tornado warnings
  12. July 29, 202142tornado warnings
  13. May 17, 202141tornado warnings
  14. March 18, 202138tornado warnings
  15. October 11, 202137tornado warnings

Nearby

Alerts in force nowThe tornado archiveThe radar archive20202022

Sources

National Weather Service watches, warnings, advisories and statements from the Iowa Environmental Mesonet's VTEC archive, which reconstructs tornado, severe thunderstorm, flash flood and marine warnings back to 1986 from the NWS text archive. Storm Prediction Center watches and mesoscale discussions from SPC's archive through the Mesonet. County centers from the US Census Bureau. Rebuilt daily.