Flash Flood Warnings in Colorado
3,062 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
- 3,062
- Busiest year
- 2021285 flash flood warnings
- Average year
- 77over 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.
- El Paso County333
- Pueblo County240
- Larimer County200
- Huerfano County173
- Fremont County164
- Custer County153
- Garfield County151
- Kit Carson County144
- Mesa County134
- Yuma County123
- Douglas County105
- San Miguel County104
- Las Animas County103
- Weld County100
- Teller County96
- Arapahoe County90
- Elbert County89
- Jefferson County88
- La Plata County88
- Costilla County83
- Cheyenne County82
- Lincoln County81
- Rio Blanco County79
- Chaffee County74
- Washington County73
- Morgan County71
- Boulder County69
- Montrose County65
- Eagle County65
- Adams County64
- Saguache County62
- Prowers County60
- Bent County60
- Otero County54
- Denver County50
- Logan County49
- Grand County47
- Dolores County42
- Pitkin County40
- Montezuma County39
24 more counties
- Park County35
- Ouray County35
- Kiowa County34
- Crowley County32
- Baca County31
- Gunnison County27
- Phillips County25
- Delta County23
- Clear Creek County21
- Sedgwick County20
- Archuleta County16
- Gilpin County12
- Hinsdale County12
- San Juan County12
- Routt County9
- Rio Grande County8
- Broomfield County8
- Moffat County6
- Jackson County6
- Mineral County5
- Summit County3
- Conejos County2
- Alamosa County2
- Lake County2
The latest flash flood warnings
The most recent on file, newest first.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 22, 7:33 PM MDT | Flash Flood Warning | BOU | Arapahoe, Douglas | 79 min |
| Sep 22, 1:38 PM MDT | Flash Flood Warning | GJT | Dolores | 2 hr |
| Sep 19, 6:19 PM MDT | Flash Flood Warning | GJT | Garfield | 3 hr |
| Sep 19, 6:01 PM MDT | Flash Flood Warning | GJT | Rio Blanco | 3 hr |
| Sep 19, 1:38 PM MDT | Flash Flood Warning | GJT | Mesa | 3 hr |
| Sep 19, 1:29 PM MDT | Flash Flood Warning | GJT | Rio Blanco | 3 hr |
| Sep 19, 1:09 AM MDT | Flash Flood Warning | GJT | Dolores | 2 hr |
| Sep 18, 4:52 PM MDT | Flash Flood Warning | GJT | Moffat, Rio Blanco | 5 hr |
| Sep 18, 4:13 PM MDT | Flash Flood Warning | GJT | Mesa | 3 hr |
| Sep 16, 9:45 PM MDT | Flash Flood Warning | GJT | Mesa | 3 hr |
| Sep 16, 9:17 PM MDT | Flash Flood Warning | GJT | Gunnison, Hinsdale, Ouray | 3 hr |
| Sep 16, 1:05 PM MDT | Flash Flood Warning | GJT | Rio Blanco | 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.