Flash Flood Warnings in Tennessee, 2023

By month

64 of 102 flash flood warnings covering Tennessee in 2023 had a flash flood report inside them; 111 of 137 flash flood reports fell inside a warning, on average 73 minutes after it went out.

Tennessee, 2023

Each office's whole area, 2023

An office's figures cover every county it serves, including across state lines.

Verified by the Iowa Environmental Mesonet's Cow, which matches each storm-based warning with the local storm reports inside its polygon while it was in force, within 15 km of its edge: a tornado warning counts as verified on a tornado report, a severe thunderstorm warning on hail of 1 inch or more, a gust of 58 mph or more, or wind damage, a flash flood warning on a flash flood report. The false alarm ratio is the share of warnings with no such report; "inside a warning" is the probability of detection, the share of reports that fell inside one; lead time runs from the warning's issue to each report inside it, counting zero for a report that came first. A warning with no report is not proof nothing happened: reports come from spotters, the public and damage surveys, and are thin where few people live.

• Weakley County14
• Henry County11
• Shelby County10
• Anderson County8
• Knox County8
• Fayette County7
• Gibson County7
• Blount County7
• Jefferson County7
• Sevier County7
• Carroll County6
• Claiborne County6
• Morgan County6
• Grainger County6
• Obion County6
• Tipton County5
• Cocke County5
• Greene County5
• Hamblen County5
• Fentress County5
• Monroe County5
• Lauderdale County4
• Madison County4
• Campbell County4
• Union County4
• Loudon County4
• Roane County4
• Crockett County3
• Haywood County3
• Dyer County3
• Scott County3
• Hancock County3
• Lincoln County3
• Franklin County3
• Hardin County3
• Putnam County3
• Meigs County3
• Rhea County3
• Overton County3
• Pickett County3

1. July 20, 202315flash flood warnings
2. August 15, 20239flash flood warnings
3. February 16, 20238flash flood warnings
4. July 5, 20236flash flood warnings
5. August 4, 20236flash flood warnings
6. March 2, 20235flash flood warnings
7. July 19, 20235flash flood warnings
8. July 21, 20235flash flood warnings
9. August 3, 20234flash flood warnings
10. August 12, 20234flash flood warnings
11. January 3, 20233flash flood warnings
12. March 25, 20233flash flood warnings

Alerts in force nowTornadoes on recordThe radar archive20222024

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. Warning verification from the Mesonet's Cow. Rebuilt daily.