Alert archive / Tornado Warnings

Tornado Warnings in the United States, 2009

3,231 tornado warnings in 2009. 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
3,231
Busiest month
June798 tornado warnings
Busiest day
April 10, 2009185 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.

4 more states

The busiest days

Days with the most alerts issued, by UTC date.

  1. April 10, 2009185tornado warnings
  2. March 27, 200980tornado warnings
  3. June 16, 200974tornado warnings
  4. March 28, 200969tornado warnings
  5. June 15, 200965tornado warnings
  6. August 19, 200962tornado warnings
  7. June 9, 200960tornado warnings
  8. December 24, 200959tornado warnings
  9. April 13, 200959tornado warnings
  10. May 8, 200957tornado warnings
  11. June 17, 200956tornado warnings
  12. April 11, 200952tornado warnings
  13. April 26, 200952tornado warnings
  14. May 6, 200951tornado warnings
  15. June 18, 200951tornado warnings

Nearby

Alerts in force nowThe tornado archiveThe radar archive20082010

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.