Alert archive / Flash Flood Warnings / 2023
Flash Flood Warnings in the United States, May 2023
466 flash flood warnings in May 2023. 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
- 466
- Busiest day
- May 26, 202340 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.
- Texas367
- California240
- Colorado175
- Arizona164
- New York156
- New Mexico153
- Arkansas153
- Missouri152
- Pennsylvania123
- Virginia119
- Kentucky110
- North Carolina106
- Kansas105
- Tennessee102
- Louisiana98
- Oklahoma97
- Mississippi92
- Georgia87
- Illinois85
- Florida83
- Utah80
- Alabama76
- Nevada72
- Nebraska72
- Montana67
- Puerto Rico65
- New Jersey64
- Massachusetts62
- New Hampshire59
- Idaho58
- West Virginia55
- Ohio52
- Maine49
- Connecticut47
- Vermont47
- Maryland36
- South Carolina35
- Wyoming34
- Hawaii33
- Indiana30
Nearby
Alerts in force nowThe tornado archiveThe radar archive20222024
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.