Alert archive / Heat Advisories

Heat Advisories in the United States, 2009

217 heat advisories in 2009. Each alert counts once, however many counties it covered. The archive of heat advisories reaches back to 2005.

Heat Advisories by state

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

AKMEVTNHWAIDMTNDMNILWIMINYRIMAORNVWYSDIAINOHPANJCTCAUTCONEMOKYWVVAMDDEAZNMKSARTNNCSCDCOKLAMSALGAHITXFLPR
Heat Advisories
217
Busiest month
June114 heat advisories
Busiest day
June 22, 200919 heat advisories

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.

The busiest days

Days with the most alerts issued, by UTC date.

  1. June 22, 200919heat advisories
  2. June 19, 200915heat advisories
  3. June 25, 200911heat advisories
  4. June 23, 200910heat advisories
  5. June 24, 20099heat advisories
  6. August 8, 20099heat advisories
  7. August 9, 20099heat advisories
  8. June 20, 20098heat advisories
  9. June 26, 20098heat advisories
  10. July 13, 20098heat advisories
  11. June 21, 20097heat advisories
  12. June 27, 20097heat advisories
  13. July 9, 20097heat advisories
  14. July 4, 20096heat advisories
  15. June 28, 20094heat advisories

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.