Alert archive / Flash Flood Warnings / 2009
Flash Flood Warnings in the United States, July 2009
587 flash flood warnings in July 2009. 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
- 587
- Busiest day
- July 31, 200948 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.
- Texas466
- Arkansas363
- Missouri363
- Mississippi303
- Alabama284
- Tennessee234
- Kentucky167
- Louisiana166
- Illinois151
- Kansas145
- Virginia123
- North Carolina119
- Indiana106
- New York98
- Pennsylvania98
- Georgia88
- Oklahoma86
- New Mexico76
- Iowa75
- Puerto Rico73
- Arizona60
- California52
- Florida48
- Idaho47
- Colorado46
- Nebraska46
- West Virginia45
- South Dakota44
- New Jersey41
- Maryland41
- South Carolina38
- Wisconsin35
- Ohio34
- North Dakota29
- Connecticut28
- Hawaii28
- Maine28
- Nevada21
- Minnesota18
- Montana17
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.