Alert archive / River Flood Advisories / 2011
River Flood Advisories in the United States, April 2011
203 river flood advisories in April 2011. Each alert counts once, however many counties it covered. The archive of river flood advisories reaches back to 2005.
River Flood Advisories by state
Each state shaded by its count. Tap a state for its own archive.
- River Flood Advisories
- 203
- Busiest day
- April 27, 201123 river flood advisories
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.
- Michigan188
- Illinois131
- Arkansas120
- Tennessee117
- Kentucky110
- Indiana50
- Colorado37
- Mississippi36
- Ohio26
- North Dakota18
- Louisiana16
- Pennsylvania13
- Missouri12
- Minnesota11
- North Carolina10
- Washington10
- Nebraska9
- Iowa8
- Wisconsin7
- Utah5
- Oklahoma5
- New York4
- Alabama3
- California3
- Vermont2
- Nevada1
- South Carolina1
- West Virginia1
- Virginia1
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.