Alert archive / River Flood Warnings / 2009
River Flood Warnings in the United States, September 2009
151 river flood warnings in September 2009. Each alert counts once, however many counties it covered. The archive of river flood warnings reaches back to 2005.
River Flood Warnings by state
Each state shaded by its count. Tap a state for its own archive.
- River Flood Warnings
- 151
- Busiest day
- September 21, 200924 river 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.
- Missouri588
- Illinois490
- Texas414
- Georgia337
- Indiana330
- Mississippi300
- Iowa223
- Alabama208
- Louisiana208
- Kansas207
- Arkansas188
- Florida137
- Michigan114
- Oklahoma104
- Washington84
- North Dakota79
- Tennessee76
- Kentucky72
- Ohio71
- Wisconsin66
- North Carolina64
- South Carolina62
- Virginia59
- South Dakota54
- Minnesota53
- New York51
- Pennsylvania31
- Oregon27
- New Jersey20
- Maine19
- West Virginia14
- Montana13
- Delaware11
- Connecticut10
- Nebraska10
- Vermont9
- Maryland7
- Idaho6
- Wyoming6
- New Hampshire6
4 more states
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.