Flash Flood Warnings in Wyoming
606 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
- 606
- Busiest year
- 200745 flash flood warnings
- Average year
- 15over 40 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.
- Laramie County126
- Platte County70
- Albany County67
- Goshen County67
- Natrona County57
- Johnson County56
- Fremont County42
- Sheridan County32
- Carbon County24
- Weston County24
- Crook County21
- Park County20
- Lincoln County19
- Washakie County18
- Converse County17
- Niobrara County17
- Campbell County17
- Hot Springs County17
- Big Horn County15
- Sweetwater County15
- Teton County9
- Sublette County9
- Uinta County2
The latest flash flood warnings
The most recent on file, newest first.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 19, 6:25 PM MDT | Flash Flood Warning | RIW | Fremont | 3 hr |
| Aug 22, 2:30 PM MDT | Flash Flood Warning | CYS | Albany | 3 hr |
| Aug 14, 4:13 PM MDT | Flash Flood Warning | CYS | Laramie | 3 hr |
| Aug 14, 3:42 PM MDT | Flash Flood Warning | CYS | Laramie | 4 hr |
| Aug 14, 2:16 PM MDT | Flash Flood Warning | CYS | Goshen, Laramie | 4 hr |
| Aug 13, 8:58 PM MDT | Flash Flood Warning | CYS | Laramie | 3 hr |
| Aug 13, 7:37 PM MDT | Flash Flood Warning | CYS | Laramie | 3 hr |
| Jul 29, 8:30 PM MDT | Flash Flood Warning | BYZ | Sheridan | 3 hr |
| Jul 29, 4:20 PM MDT | Flash Flood Warning | CYS | Laramie | 3 hr |
| Jul 26, 3:59 PM MDT | Flash Flood Warning | BYZ | Sheridan | 3 hr |
| Jul 18, 4:33 PM MDT | Flash Flood Warning | BYZ | Sheridan | 3 hr |
| Jul 16, 4:28 PM MDT | Flash Flood Warning | RIW | Big Horn, Washakie | 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.