Alert archive / Colorado / Red Flag Warnings / 2026
Red Flag Warnings in Colorado, May 2026
15 red flag warnings in May 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 red flag warnings reaches back to 2005.
Red Flag Warnings by county
Each county as a circle sized by its count in May 2026. Tap one for its archive.
- Red Flag Warnings
- 15
- Busiest day
- May 13, 20263 red flag 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 |
|---|---|---|---|---|
| May 8, 10:55 AM MDT | Red Flag Warning | GJT | Moffat | 33 hr |
| May 11, 10:29 PM MDT | Red Flag Warning | GJT | Delta, Moffat, Montrose, Ouray, Rio Blanco, San Miguel | 47 hr |
| May 12, 10:11 PM MDT | Red Flag Warning | GJT | Delta, Gunnison, Hinsdale | 46 hr |
| May 13, 11:43 AM MDT | Red Flag Warning | BOU | Larimer, Logan, Phillips, Sedgwick, Weld | 33 hr |
| May 13, 1:33 PM MDT | Red Flag Warning | PUB | Chaffee, Costilla, Custer, Fremont, Huerfano, Lake and 3 more | 29 hr |
| May 14, 10:38 AM MDT | Red Flag Warning | GJT | Delta, Eagle, Garfield, Gunnison, Hinsdale, Mesa and 3 more | 33 hr |
| May 15, 10:39 AM MDT | Red Flag Warning | GJT | Delta, Eagle, Garfield, Mesa, Montrose, Ouray and 2 more | 33 hr |
| May 15, 1:19 PM MDT | Red Flag Warning | PUB | Baca, Bent, Chaffee, Costilla, Crowley, Custer and 7 more | 31 hr |
| May 16, 11:53 AM MDT | Red Flag Warning | PUB | Baca, Bent, Costilla, Crowley, Custer, Fremont and 7 more | 33 hr |
| May 17, 12:57 PM MDT | Red Flag Warning | PUB | Baca, Las Animas | 30 hr |
| May 20, 8:42 PM MDT | Red Flag Warning | GJT | Dolores, La Plata, Montezuma, Montrose, San Miguel | 24 hr |
| May 21, 9:56 PM MDT | Red Flag Warning | GJT | Dolores, La Plata, Montezuma, San Miguel | 22 hr |
| May 26, 11:51 AM MDT | Red Flag Warning | GJT | Dolores, La Plata, Montezuma, Montrose, San Miguel | 32 hr |
| May 27, 12:12 PM MDT | Red Flag Warning | GJT | Delta, Dolores, La Plata, Montezuma, Montrose, Ouray and 1 more | 32 hr |
| May 28, 11:19 AM MDT | Red Flag Warning | GJT | Delta, Dolores, La Plata, Montezuma, Montrose, Ouray and 1 more | 33 hr |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- San Miguel County7
- Delta County6
- Montrose County6
- Dolores County5
- La Plata County5
- Montezuma County5
- Ouray County4
- Las Animas County4
- Moffat County3
- Costilla County3
- Custer County3
- Fremont County3
- Huerfano County3
- Pueblo County3
- Saguache County3
- Baca County3
- Rio Blanco County2
- Gunnison County2
- Hinsdale County2
- Chaffee County2
- Lake County2
- Eagle County2
- Garfield County2
- Mesa County2
- Pitkin County2
- Bent County2
- Crowley County2
- Otero County2
- Larimer County1
- Logan County1
- Phillips County1
- Sedgwick County1
- Weld County1
- Kiowa County1
- Prowers 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.