River Flood Warnings in the United States
74,692 river flood warnings since 1986. 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
- 74,692
- Busiest year
- 20196,748 river flood warnings
- Average year
- 3,735over 20 years on file
- Busiest day
- February 6, 2020189 river flood warnings
Over time
By year
Before late 2005 the archive holds only tornado, severe thunderstorm, flash flood and marine warnings, and from 1997 SPC's watches, so the jump that year is the archive widening, not the weather.
By month of the year
By state
Every state and territory, with the alerts that covered any part of it. Each state’s page lists every one of them.
- Missouri7,989
- Texas7,875
- Illinois5,946
- Indiana5,882
- Georgia4,233
- Iowa3,975
- Mississippi3,885
- Louisiana3,267
- Kansas3,109
- Ohio2,732
- Arkansas2,277
- Alabama2,060
- Oklahoma2,031
- Wisconsin2,025
- Kentucky1,948
- Florida1,863
- Minnesota1,533
- North Carolina1,526
- Tennessee1,498
- Washington1,479
- New York1,396
- Pennsylvania1,311
- South Dakota1,284
- Michigan1,219
- Virginia1,183
- South Carolina1,123
- Nebraska993
- North Dakota692
- New Jersey596
- Oregon593
- West Virginia586
- California461
- Connecticut413
- New Hampshire361
- Vermont360
- Massachusetts351
- Maine346
- Montana333
- Maryland285
- Colorado273
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
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.