Alert archive / Colorado / Flash Flood Warnings / 2026
Flash Flood Warnings in Colorado, August 2026
73 flash flood warnings in August 2026. 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 August 2026. Tap one for its archive.
- Flash Flood Warnings
- 73
- Busiest day
- August 15, 202612 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 |
|---|---|---|---|---|
| Aug 12, 1:10 PM MDT | Flash Flood Warning | GJT | San Miguel | 3 hr |
| Aug 12, 3:24 PM MDT | Flash Flood Warning | PUB | Lake | 3 hr |
| Aug 12, 6:39 PM MDT | Flash Flood Warning | GJT | Rio Blanco | 3 hr |
| Aug 13, 12:50 PM MDT | Flash Flood Warning | GJT | Mesa | 3 hr |
| Aug 13, 1:21 PM MDT | Flash Flood Warning | GJT | Rio Blanco | 3 hr |
| Aug 13, 1:48 PM MDT | Flash Flood Warning | PUB | Custer, Pueblo | 111 min |
| Aug 13, 2:00 PM MDT | Flash Flood Warning | PUB | Pueblo | 2 hr |
| Aug 13, 4:00 PM MDT | Flash Flood Warning | BOU | Douglas, Jefferson | 3 hr |
| Aug 13, 4:21 PM MDT | Flash Flood Warning | BOU | Arapahoe, Denver | 3 hr |
| Aug 13, 9:20 PM MDT | Flash Flood Warning | BOU | Weld | 3 hr |
| Aug 14, 12:59 PM MDT | Flash Flood Warning | PUB | Custer, Pueblo | 3 hr |
| Aug 14, 2:07 PM MDT | Flash Flood Warning | BOU | Douglas, Elbert | 3 hr |
| Aug 14, 2:57 PM MDT | Flash Flood Warning | BOU | Adams, Arapahoe | 3 hr |
| Aug 14, 3:30 PM MDT | Flash Flood Warning | BOU | Arapahoe, Denver, Jefferson | 99 min |
| Aug 14, 3:37 PM MDT | Flash Flood Warning | BOU | Larimer | 3 hr |
| Aug 14, 3:43 PM MDT | Flash Flood Warning | PUB | Las Animas | 3 hr |
| Aug 14, 3:55 PM MDT | Flash Flood Warning | BOU | Adams, Weld | 3 hr |
| Aug 14, 4:42 PM MDT | Flash Flood Warning | BOU | Weld | 2 hr |
| Aug 14, 4:53 PM MDT | Flash Flood Warning | BOU | Elbert | 4 hr |
| Aug 14, 5:31 PM MDT | Flash Flood Warning | BOU | Weld | 2 hr |
| Aug 14, 7:37 PM MDT | Flash Flood Warning | BOU | Washington | 100 min |
| Aug 15, 1:41 PM MDT | Flash Flood Warning | BOU | Douglas | 3 hr |
| Aug 15, 2:07 PM MDT | Flash Flood Warning | PUB | Las Animas | 2 hr |
| Aug 15, 2:44 PM MDT | Flash Flood Warning | BOU | Adams, Arapahoe, Denver | 3 hr |
| Aug 15, 3:03 PM MDT | Flash Flood Warning | PUB | Las Animas | 3 hr |
| Aug 15, 3:05 PM MDT | Flash Flood Warning | PUB | Las Animas | 3 hr |
| Aug 15, 3:57 PM MDT | Flash Flood Warning | PUB | Las Animas | 3 hr |
| Aug 15, 4:08 PM MDT | Flash Flood Warning | BOU | Weld | 3 hr |
| Aug 15, 4:31 PM MDT | Flash Flood Warning | PUB | Custer, Pueblo | 2 hr |
| Aug 15, 5:16 PM MDT | Flash Flood Warning | PUB | Las Animas | 3 hr |
| Aug 15, 5:51 PM MDT | Flash Flood Warning | PUB | Pueblo | 80 min |
| Aug 15, 5:54 PM MDT | Flash Flood Warning | PUB | Baca | 3 hr |
| Aug 15, 7:09 PM MDT | Flash Flood Warning | BOU | Lincoln | 3 hr |
| Aug 16, 1:12 PM MDT | Flash Flood Warning | PUB | Custer, Pueblo | 3 hr |
| Aug 16, 1:49 PM MDT | Flash Flood Warning | PUB | Custer, Pueblo | 2 hr |
| Aug 16, 2:43 PM MDT | Flash Flood Warning | PUB | El Paso | 2 hr |
| Aug 16, 2:54 PM MDT | Flash Flood Warning | BOU | Elbert | 3 hr |
| Aug 16, 4:45 PM MDT | Flash Flood Warning | BOU | Lincoln | 48 min |
| Aug 16, 5:26 PM MDT | Flash Flood Warning | PUB | Teller | 3 hr |
| Aug 16, 5:31 PM MDT | Flash Flood Warning | BOU | Lincoln | 3 hr |
| Aug 16, 6:57 PM MDT | Flash Flood Warning | PUB | Pueblo | 2 hr |
| Aug 16, 8:09 PM MDT | Flash Flood Warning | PUB | Pueblo | 3 hr |
| Aug 17, 12:42 AM MDT | Flash Flood Warning | PUB | El Paso, Fremont, Pueblo | 3 hr |
| Aug 17, 2:33 AM MDT | Flash Flood Warning | PUB | Fremont | 119 min |
| Aug 19, 3:33 PM MDT | Flash Flood Warning | PUB | Custer, Pueblo | 3 hr |
| Aug 19, 6:02 PM MDT | Flash Flood Warning | PUB | Pueblo | 91 min |
| Aug 19, 6:42 PM MDT | Flash Flood Warning | PUB | Custer, Pueblo | 93 min |
| Aug 19, 6:42 PM MDT | Flash Flood Warning | PUB | Custer, Pueblo | 92 min |
| Aug 20, 3:07 PM MDT | Flash Flood Warning | PUB | Fremont, Pueblo | 3 hr |
| Aug 20, 5:24 PM MDT | Flash Flood Warning | PUB | Pueblo | 3 hr |
| Aug 21, 5:01 PM MDT | Flash Flood Warning | GJT | Montrose | 119 min |
| Aug 22, 1:52 PM MDT | Flash Flood Warning | GJT | San Miguel | 3 hr |
| Aug 22, 2:13 PM MDT | Flash Flood Warning | BOU | Douglas | 3 hr |
| Aug 22, 2:49 PM MDT | Flash Flood Warning | GJT | Gunnison, Hinsdale, Ouray | 3 hr |
| Aug 23, 2:31 PM MDT | Flash Flood Warning | GJT | Rio Blanco | 3 hr |
| Aug 23, 3:25 PM MDT | Flash Flood Warning | PUB | Custer, Pueblo | 3 hr |
| Aug 23, 3:25 PM MDT | Flash Flood Warning | PUB | Custer, Pueblo | 3 hr |
| Aug 23, 4:16 PM MDT | Flash Flood Warning | PUB | El Paso | 117 min |
| Aug 24, 3:15 PM MDT | Flash Flood Warning | GJT | Rio Blanco | 3 hr |
| Aug 24, 5:33 PM MDT | Flash Flood Warning | PUB | Custer, Pueblo | 112 min |
| Aug 25, 4:30 PM MDT | Flash Flood Warning | PUB | Custer, Pueblo | 3 hr |
| Aug 25, 4:40 PM MDT | Flash Flood Warning | PUB | Custer, Pueblo | 3 hr |
| Aug 25, 8:23 PM MDT | Flash Flood Warning | PUB | Bent, Prowers | 118 min |
| Aug 25, 9:01 PM MDT | Flash Flood Warning | PUB | Prowers | 80 min |
| Aug 26, 4:10 PM MDT | Flash Flood Warning | PUB | El Paso, Fremont, Pueblo | 3 hr |
| Aug 26, 6:35 PM MDT | Flash Flood Warning | PUB | Huerfano | 2 hr |
| Aug 26, 7:08 PM MDT | Flash Flood Warning | BOU | Adams, Arapahoe, Elbert | 3 hr |
| Aug 27, 3:23 PM MDT | Flash Flood Warning | PUB | Custer, Pueblo | 3 hr |
| Aug 27, 5:14 PM MDT | Flash Flood Warning | PUB | Huerfano, Pueblo | 71 min |
| Aug 27, 5:32 PM MDT | Flash Flood Warning | PUB | Huerfano | 3 hr |
| Aug 30, 5:36 PM MDT | Flash Flood Warning | GJT | Dolores | 84 min |
| Aug 30, 5:58 PM MDT | Flash Flood Warning | GJT | Mesa | 4 hr |
| Aug 31, 5:03 PM MDT | Flash Flood Warning | PUB | Las Animas, Otero | 3 hr |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Pueblo County24
- Custer County14
- Las Animas County7
- Arapahoe County5
- Weld County5
- Rio Blanco County4
- Douglas County4
- Elbert County4
- Adams County4
- El Paso County4
- Fremont County4
- Denver County3
- Lincoln County3
- Huerfano County3
- San Miguel County2
- Mesa County2
- Jefferson County2
- Prowers County2
- Lake County1
- Larimer County1
- Washington County1
- Baca County1
- Teller County1
- Montrose County1
- Gunnison County1
- Hinsdale County1
- Ouray County1
- Bent County1
- Dolores County1
- Otero County1
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. Warning verification from the Mesonet's Cow. Rebuilt daily.