Alert archive / Mesoscale Discussions

Mesoscale Discussions in the United States, 2011

2,390 mesoscale discussions in 2011. Each alert counts once, however many counties it covered. The archive of mesoscale discussions reaches back to 2003.

Mesoscale Discussions by state

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

AKMEVTNHWAIDMTNDMNILWIMINYRIMAORNVWYSDIAINOHPANJCTCAUTCONEMOKYWVVAMDDEAZNMKSARTNNCSCDCOKLAMSALGAHITXFLPR
Mesoscale Discussions
2,390
Busiest month
June410 mesoscale discussions
Busiest day
May 23, 201140 mesoscale discussions

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.

8 more states

The busiest days

Days with the most alerts issued, by UTC date.

  1. May 23, 201140mesoscale discussions
  2. April 27, 201137mesoscale discussions
  3. May 11, 201131mesoscale discussions
  4. May 24, 201129mesoscale discussions
  5. May 25, 201129mesoscale discussions
  6. May 22, 201128mesoscale discussions
  7. February 28, 201125mesoscale discussions
  8. April 4, 201125mesoscale discussions
  9. April 28, 201125mesoscale discussions
  10. April 26, 201124mesoscale discussions
  11. June 20, 201124mesoscale discussions
  12. April 25, 201122mesoscale discussions
  13. May 12, 201122mesoscale discussions
  14. May 26, 201122mesoscale discussions
  15. June 19, 201122mesoscale discussions

Nearby

Alerts in force nowThe tornado archiveThe radar archive20102012

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.