Alert archive / Excessive Heat Warnings

Excessive Heat Warnings in the United States, 2018

121 excessive heat warnings in 2018. Each alert counts once, however many counties it covered. The archive of excessive heat warnings reaches back to 2005.

Excessive Heat Warnings by state

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

AKMEVTNHWAIDMTNDMNILWIMINYRIMAORNVWYSDIAINOHPANJCTCAUTCONEMOKYWVVAMDDEAZNMKSARTNNCSCDCOKLAMSALGAHITXFLPR
Excessive Heat Warnings
121
Busiest month
July53 excessive heat warnings
Busiest day
July 20, 201814 excessive heat 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.

The busiest days

Days with the most alerts issued, by UTC date.

  1. July 20, 201814excessive heat warnings
  2. June 29, 201812excessive heat warnings
  3. June 28, 20187excessive heat warnings
  4. July 4, 20186excessive heat warnings
  5. July 19, 20186excessive heat warnings
  6. June 30, 20185excessive heat warnings
  7. August 9, 20185excessive heat warnings
  8. July 3, 20184excessive heat warnings
  9. July 5, 20184excessive heat warnings
  10. August 5, 20184excessive heat warnings
  11. June 11, 20183excessive heat warnings
  12. June 19, 20183excessive heat warnings
  13. June 27, 20183excessive heat warnings
  14. August 6, 20183excessive heat warnings
  15. August 7, 20183excessive heat warnings

Nearby

Alerts in force nowThe tornado archiveThe radar archive20172019

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.