Alert archive / Colorado / Flash Flood Warnings / 2025
Flash Flood Warnings in Colorado, September 2025
18 flash flood warnings in September 2025. 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 in September 2025. Tap one for its archive.
- Flash Flood Warnings
- 18
- Busiest day
- September 13, 20254 flash flood warnings
Over time
By day
Days in UTC, the clock the archive keeps.
The alerts
Every alert, in the order issued. Times are local, Mountain Time. Each opens its own page with the text, the map, the radar and the sounding.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 4, 1:28 PM MDT | Flash Flood Warning | GJT | Garfield, Rio Blanco | 2 hr |
| Sep 6, 12:48 PM MDT | Flash Flood Warning | GJT | Rio Blanco | 117 min |
| Sep 7, 5:50 PM MDT | Flash Flood Warning | GJT | Rio Blanco | 91 min |
| Sep 9, 12:52 PM MDT | Flash Flood Warning | GJT | Rio Blanco | 113 min |
| Sep 11, 2:06 PM MDT | Flash Flood Warning | GJT | Dolores, Montezuma | 58 min |
| Sep 11, 2:44 PM MDT | Flash Flood Warning | GJT | Rio Blanco | 2 hr |
| Sep 12, 11:42 AM MDT | Flash Flood Warning | GJT | Rio Blanco | 3 hr |
| Sep 12, 4:13 PM MDT | Flash Flood Warning | GJT | Rio Blanco | 70 min |
| Sep 13, 12:11 PM MDT | Flash Flood Warning | GJT | Mesa | 4 hr |
| Sep 13, 1:42 PM MDT | Flash Flood Warning | GJT | Rio Blanco | 93 min |
| Sep 13, 2:23 PM MDT | Flash Flood Warning | GJT | Rio Blanco | 112 min |
| Sep 13, 2:36 PM MDT | Flash Flood Warning | GJT | Montezuma | 3 hr |
| Sep 16, 3:50 PM MDT | Flash Flood Warning | PUB | Baca | 3 hr |
| Sep 16, 4:50 PM MDT | Flash Flood Warning | GJT | Rio Blanco | 85 min |
| Sep 17, 11:27 PM MDT | Flash Flood Warning | PUB | Prowers | 2 hr |
| Sep 22, 3:15 PM MDT | Flash Flood Warning | GJT | Rio Blanco | 3 hr |
| Sep 22, 4:02 PM MDT | Flash Flood Warning | GJT | Rio Blanco | 4 hr |
| Sep 28, 7:34 PM MDT | Flash Flood Warning | GJT | Rio Blanco | 86 min |
By county
Every county with at least one alert. A county page lists each alert that covered it.
Nearby
Alerts in force nowTornadoes on recordThe radar archive20242026
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. Warning verification from the Mesonet's Cow. Rebuilt daily.