Alert archive / Colorado / Red Flag Warnings / 2026
Red Flag Warnings in Colorado, March 2026
45 red flag warnings in March 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 March 2026. Tap one for its archive.
- Red Flag Warnings
- 45
- Busiest day
- March 11, 20264 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 |
|---|---|---|---|---|
| Mar 1, 11:35 AM MST | Red Flag Warning | PUB | Fremont, Huerfano, Las Animas | 31 hr |
| Mar 2, 11:32 AM MST | Red Flag Warning | PUB | Huerfano, Las Animas | 29 hr |
| Mar 4, 11:33 AM MST | Red Flag Warning | PUB | Alamosa, Baca, Bent, Conejos, Costilla, Crowley and 11 more | 31 hr |
| Mar 4, 11:41 AM MST | Red Flag Warning | BOU | Arapahoe, Douglas, Elbert, Lincoln | 30 hr |
| Mar 4, 11:52 PM MST | Red Flag Warning | GLD | Cheyenne, Kit Carson | 18 hr |
| Mar 7, 11:44 AM MST | Red Flag Warning | PUB | Huerfano, Las Animas | 30 hr |
| Mar 8, 12:34 PM MDT | Red Flag Warning | PUB | Alamosa, Conejos, Costilla, Crowley, El Paso, Fremont and 5 more | 30 hr |
| Mar 9, 12:40 PM MDT | Red Flag Warning | PUB | Fremont | 30 hr |
| Mar 10, 2:26 AM MDT | Red Flag Warning | BOU | Adams, Arapahoe, Boulder, Broomfield, Denver, Douglas and 3 more | 11 hr |
| Mar 11, 12:31 AM MDT | Red Flag Warning | PUB | Alamosa, Chaffee, Conejos, Costilla, Lake, Rio Grande and 1 more | 18 hr |
| Mar 11, 12:45 PM MDT | Red Flag Warning | GLD | Cheyenne, Kit Carson, Yuma | 30 hr |
| Mar 11, 1:00 PM MDT | Red Flag Warning | PUB | Alamosa, Baca, Bent, Conejos, Costilla, Crowley and 10 more | 32 hr |
| Mar 11, 1:22 PM MDT | Red Flag Warning | BOU | Adams, Arapahoe, Boulder, Broomfield, Denver, Douglas and 10 more | 32 hr |
| Mar 12, 11:36 AM MDT | Red Flag Warning | PUB | Alamosa, Chaffee, Conejos, Costilla, Crowley, Custer and 9 more | 32 hr |
| Mar 12, 12:15 PM MDT | Red Flag Warning | GLD | Kit Carson, Yuma | 31 hr |
| Mar 12, 12:50 PM MDT | Red Flag Warning | BOU | Adams, Arapahoe, Boulder, Broomfield, Denver, Douglas and 10 more | 31 hr |
| Mar 12, 8:58 PM MDT | Red Flag Warning | BOU | Adams, Arapahoe, Boulder, Broomfield, Denver, Douglas and 10 more | 48 hr |
| Mar 13, 12:33 AM MDT | Red Flag Warning | PUB | Alamosa, Baca, Bent, Chaffee, Conejos, Costilla and 14 more | 45 hr |
| Mar 13, 1:31 AM MDT | Red Flag Warning | GLD | Cheyenne, Kit Carson, Yuma | 41 hr |
| Mar 14, 12:26 PM MDT | Red Flag Warning | PUB | Alamosa, Conejos, Costilla, Rio Grande, Saguache | 32 hr |
| Mar 16, 12:56 PM MDT | Red Flag Warning | GLD | Yuma | 29 hr |
| Mar 16, 1:55 PM MDT | Red Flag Warning | BOU | Larimer, Logan, Morgan, Phillips, Sedgwick, Washington and 1 more | 30 hr |
| Mar 17, 1:09 PM MDT | Red Flag Warning | BOU | Adams, Arapahoe, Boulder, Broomfield, Denver, Douglas and 8 more | 30 hr |
| Mar 17, 1:13 PM MDT | Red Flag Warning | PUB | Alamosa, Conejos, Costilla, Fremont, Rio Grande, Saguache | 31 hr |
| Mar 17, 10:27 PM MDT | Red Flag Warning | GLD | Yuma | 19 hr |
| Mar 18, 12:29 PM MDT | Red Flag Warning | BOU | Larimer, Weld | 31 hr |
| Mar 18, 7:06 PM MDT | Red Flag Warning | BOU | Larimer, Logan, Weld | 54 min |
| Mar 19, 1:57 PM MDT | Red Flag Warning | BOU | Larimer, Weld | 29 hr |
| Mar 20, 12:36 AM MDT | Red Flag Warning | PUB | Alamosa, Baca, Chaffee, Conejos, Costilla, Custer and 10 more | 46 hr |
| Mar 20, 11:40 AM MDT | Red Flag Warning | GJT | Moffat, Rio Blanco, Routt | 32 hr |
| Mar 20, 12:46 PM MDT | Red Flag Warning | BOU | Adams, Arapahoe, Boulder, Broomfield, Clear Creek, Denver and 13 more | 33 hr |
| Mar 22, 12:46 PM MDT | Red Flag Warning | PUB | Alamosa, Conejos, Costilla, Custer, Huerfano, Las Animas and 3 more | 30 hr |
| Mar 24, 11:03 AM MDT | Red Flag Warning | GJT | Moffat, Rio Blanco | 33 hr |
| Mar 24, 11:46 AM MDT | Red Flag Warning | PUB | Alamosa, Conejos, Costilla, Fremont, Rio Grande, Saguache | 31 hr |
| Mar 25, 11:03 AM MDT | Red Flag Warning | GJT | Moffat, Rio Blanco | 33 hr |
| Mar 25, 11:58 AM MDT | Red Flag Warning | BOU | Elbert, Lincoln, Park | 30 hr |
| Mar 25, 12:18 PM MDT | Red Flag Warning | PUB | Alamosa, Baca, Bent, Chaffee, Conejos, Costilla and 14 more | 32 hr |
| Mar 25, 10:51 PM MDT | Red Flag Warning | GLD | Cheyenne, Kit Carson | 20 hr |
| Mar 27, 9:00 AM MDT | Red Flag Warning | GLD | Cheyenne, Kit Carson | 34 hr |
| Mar 27, 11:10 AM MDT | Red Flag Warning | GJT | Moffat, Rio Blanco | 33 hr |
| Mar 27, 12:57 PM MDT | Red Flag Warning | PUB | Alamosa, Baca, Bent, Chaffee, Conejos, Costilla and 12 more | 31 hr |
| Mar 27, 9:43 PM MDT | Red Flag Warning | GJT | Eagle, Garfield, Mesa, Moffat, Pitkin, Rio Blanco | 46 hr |
| Mar 28, 10:00 PM MDT | Red Flag Warning | GJT | Delta, Eagle, Garfield, Mesa, Moffat, Montrose and 5 more | 46 hr |
| Mar 29, 12:19 PM MDT | Red Flag Warning | BOU | Adams, Arapahoe, Boulder, Broomfield, Clear Creek, Denver and 9 more | 32 hr |
| Mar 29, 1:57 PM MDT | Red Flag Warning | PUB | Alamosa, Baca, Bent, Conejos, Costilla, Crowley and 11 more | 30 hr |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Alamosa County14
- Conejos County14
- Costilla County14
- Rio Grande County14
- Saguache County14
- Fremont County13
- Huerfano County13
- Las Animas County13
- Larimer County11
- Weld County11
- Pueblo County10
- El Paso County9
- Arapahoe County8
- Douglas County8
- Baca County7
- Crowley County7
- Custer County7
- Adams County7
- Boulder County7
- Broomfield County7
- Denver County7
- Jefferson County7
- Logan County7
- Bent County6
- Kiowa County6
- Otero County6
- Prowers County6
- Elbert County6
- Kit Carson County6
- Chaffee County6
- Lake County6
- Morgan County6
- Sedgwick County6
- Moffat County6
- Rio Blanco County6
- Lincoln County5
- Cheyenne County5
- Yuma County5
- Phillips County5
- Washington County5
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.