Flash Flood Warnings in Utah
2,134 flash flood warnings since 1986. An alert counts here when it covered any part of the state, so the counties below add up to more than the state. The archive of flash flood warnings reaches back to 1986.
Flash Flood Warnings by county
Each county as a circle sized by its count since 1986. Tap one for its archive.
- Flash Flood Warnings
- 2,134
- Busiest year
- 2026175 flash flood warnings
- Average year
- 52over 41 years on file
Over time
By year
Before October 2007 these were issued for whole counties, and a storm crossing three counties was often three warnings; since then one polygon follows the storm. The count changed with the practice, not only with the weather.
By month of the year
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Kane County601
- Washington County492
- Garfield County424
- Wayne County281
- San Juan County255
- Emery County164
- Iron County141
- Grand County122
- Carbon County72
- Utah County45
- Sevier County42
- Piute County40
- Uintah County38
- Tooele County35
- Duchesne County35
- Davis County25
- Beaver County23
- Salt Lake County20
- Sanpete County20
- Morgan County17
- Wasatch County16
- Weber County15
- Juab County13
- Millard County11
- Summit County10
- Box Elder County8
- Daggett County6
- Cache County3
- Rich County2
The latest flash flood warnings
The most recent on file, newest first.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 18, 4:52 PM MDT | Flash Flood Warning | GJT | Uintah | 5 hr |
| Sep 16, 3:38 PM MDT | Flash Flood Warning | SLC | Kane | 4 hr |
| Sep 16, 3:28 PM MDT | Flash Flood Warning | SLC | Kane | 2 hr |
| Sep 16, 3:15 PM MDT | Flash Flood Warning | SLC | Wayne | 3 hr |
| Sep 16, 2:54 PM MDT | Flash Flood Warning | GJT | Grand | 3 hr |
| Sep 16, 2:39 PM MDT | Flash Flood Warning | SLC | Kane | 3 hr |
| Sep 16, 1:48 PM MDT | Flash Flood Warning | SLC | Emery | 3 hr |
| Sep 16, 12:34 PM MDT | Flash Flood Warning | SLC | San Juan | 2 hr |
| Sep 16, 12:01 PM MDT | Flash Flood Warning | SLC | San Juan | 3 hr |
| Sep 16, 10:11 AM MDT | Flash Flood Warning | SLC | Garfield, Kane | 6 hr |
| Sep 16, 7:29 AM MDT | Flash Flood Warning | SLC | Garfield | 3 hr |
| Sep 15, 5:51 PM MDT | Flash Flood Warning | GJT | Grand | 3 hr |
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.