Alert archive / Flash Flood Warnings / 2011
Flash Flood Warnings in the United States, December 2011
24 flash flood warnings in December 2011. 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
- 24
- Busiest day
- December 10, 20118 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.
- Arkansas275
- Mississippi249
- Missouri205
- Illinois205
- Pennsylvania201
- New York183
- Kentucky179
- Virginia167
- Arizona153
- Puerto Rico152
- Tennessee149
- Alabama148
- California122
- North Carolina120
- Indiana114
- Maryland110
- Ohio104
- Colorado89
- New Mexico89
- West Virginia87
- Iowa86
- Nebraska75
- Utah75
- South Dakota67
- Louisiana57
- Kansas57
- North Dakota57
- Montana56
- Nevada55
- Minnesota53
- Oklahoma52
- Texas51
- New Jersey44
- Michigan42
- Hawaii41
- Wisconsin30
- Wyoming28
- Vermont28
- South Carolina25
- Georgia23
Nearby
Alerts in force nowThe tornado archiveThe radar archive20102012
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.