Alert archive / Flash Flood Watches / 2021
Flash Flood Watches in the United States, December 2021
6 flash flood watches in December 2021. Each alert counts once, however many counties it covered. The archive of flash flood watches reaches back to 2005.
Flash Flood Watches by state
Each state shaded by its count. Tap a state for its own archive.
- Flash Flood Watches
- 6
- Busiest day
- December 12, 20212 flash flood watches
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.
- Colorado66
- Texas60
- Mississippi50
- Virginia46
- Alabama44
- New Mexico44
- Georgia42
- North Carolina42
- California41
- Pennsylvania40
- New York36
- Louisiana35
- Missouri33
- Arizona33
- Tennessee33
- Kentucky32
- Arkansas26
- Kansas24
- Florida24
- Maryland24
- South Carolina23
- Illinois23
- West Virginia22
- Utah22
- Connecticut21
- Indiana20
- Ohio19
- New Jersey19
- Nevada15
- Iowa15
- District of Columbia15
- Oklahoma14
- Massachusetts14
- Hawaii10
- Idaho10
- Delaware10
- Maine9
- Vermont9
- Montana7
- Guam7
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.