Alert archive / Hazardous Seas Warnings

Hazardous Seas Warnings in the United States, 2021

154 hazardous seas warnings in 2021. Each alert counts once, however many counties it covered. The archive of hazardous seas warnings reaches back to 2005.

Hazardous Seas Warnings by state

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

AKMEVTNHWAIDMTNDMNILWIMINYRIMAORNVWYSDIAINOHPANJCTCAUTCONEMOKYWVVAMDDEAZNMKSARTNNCSCDCOKLAMSALGAHITXFLPR
Hazardous Seas Warnings
154
Busiest month
January20 hazardous seas warnings
Busiest day
March 30, 20213 hazardous seas 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. March 30, 20213hazardous seas warnings
  2. October 20, 20212hazardous seas warnings
  3. October 22, 20212hazardous seas warnings
  4. October 23, 20212hazardous seas warnings
  5. November 4, 20212hazardous seas warnings
  6. November 17, 20212hazardous seas warnings
  7. December 14, 20212hazardous seas warnings
  8. December 21, 20212hazardous seas warnings
  9. January 3, 20212hazardous seas warnings
  10. January 5, 20212hazardous seas warnings
  11. January 8, 20212hazardous seas warnings
  12. February 19, 20212hazardous seas warnings
  13. February 22, 20212hazardous seas warnings
  14. March 5, 20212hazardous seas warnings
  15. March 29, 20212hazardous seas warnings

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.