Alert archive / River Flood Warnings

River Flood Warnings in the United States, 2009

4,431 river flood warnings in 2009. Each alert counts once, however many counties it covered. The archive of river flood warnings reaches back to 2005.

River Flood Warnings by state

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

AKMEVTNHWAIDMTNDMNILWIMINYRIMAORNVWYSDIAINOHPANJCTCAUTCONEMOKYWVVAMDDEAZNMKSARTNNCSCDCOKLAMSALGAHITXFLPR
River Flood Warnings
4,431
Busiest month
April680 river flood warnings
Busiest day
October 30, 2009140 river flood 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.

4 more states

The busiest days

Days with the most alerts issued, by UTC date.

  1. October 30, 2009140river flood warnings
  2. April 27, 2009131river flood warnings
  3. February 11, 2009123river flood warnings
  4. March 8, 2009113river flood warnings
  5. November 11, 200986river flood warnings
  6. December 24, 200980river flood warnings
  7. January 7, 200978river flood warnings
  8. March 9, 200973river flood warnings
  9. April 30, 200973river flood warnings
  10. December 9, 200967river flood warnings
  11. March 28, 200967river flood warnings
  12. May 6, 200964river flood warnings
  13. May 15, 200964river flood warnings
  14. October 9, 200962river flood warnings
  15. June 16, 200960river flood warnings

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.