Alert archive / Flash Flood Warnings / 2021
Flash Flood Warnings in the United States, October 2021
245 flash flood warnings in October 2021. Each alert counts once, however many counties it covered. The archive of flash flood warnings reaches back to 1986.
Flash Flood Warnings by state
Each state shaded by its count. Tap a state for its own archive.
- Flash Flood Warnings
- 245
- Busiest day
- October 6, 202130 flash flood warnings
Over time
By day
Days in UTC, the clock the archive keeps.
By state
Every state and territory, with the alerts that covered any part of it. Each state’s page lists every one of them.
- Arizona689
- Texas470
- Colorado285
- Mississippi235
- Missouri191
- Arkansas182
- Alabama181
- Louisiana179
- New Mexico170
- Kentucky166
- Utah157
- Pennsylvania155
- California154
- Tennessee152
- Virginia149
- New York145
- West Virginia129
- Oklahoma128
- Kansas103
- Florida99
- Illinois99
- North Carolina92
- New Jersey85
- Georgia82
- Ohio82
- Indiana56
- Hawaii50
- Nevada49
- Maryland42
- Massachusetts35
- Idaho34
- Nebraska33
- Connecticut32
- Iowa30
- South Carolina21
- Wisconsin20
- Michigan19
- Puerto Rico18
- Wyoming15
- New Hampshire14
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.