Alert archive / Excessive Heat Watches

Excessive Heat Watches in the United States, 2021

114 excessive heat watches in 2021. Each alert counts once, however many counties it covered. The archive of excessive heat watches reaches back to 2005.

Excessive Heat Watches by state

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

AKMEVTNHWAIDMTNDMNILWIMINYRIMAORNVWYSDIAINOHPANJCTCAUTCONEMOKYWVVAMDDEAZNMKSARTNNCSCDCOKLAMSALGAHITXFLPR
Excessive Heat Watches
114
Busiest month
June37 excessive heat watches
Busiest day
July 6, 20217 excessive heat watches

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. July 6, 20217excessive heat watches
  2. July 29, 20216excessive heat watches
  3. June 9, 20215excessive heat watches
  4. June 22, 20215excessive heat watches
  5. June 23, 20215excessive heat watches
  6. August 10, 20215excessive heat watches
  7. June 11, 20214excessive heat watches
  8. June 24, 20214excessive heat watches
  9. July 5, 20214excessive heat watches
  10. August 2, 20214excessive heat watches
  11. August 8, 20214excessive heat watches
  12. June 19, 20213excessive heat watches
  13. July 14, 20213excessive heat watches
  14. July 24, 20213excessive heat watches
  15. July 26, 20213excessive heat watches

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.