Alert archive / Colorado / Red Flag Warnings / 2025
Red Flag Warnings in Colorado, December 2025
12 red flag warnings in December 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 red flag warnings reaches back to 2005.
Red Flag Warnings by county
Each county as a circle sized by its count in December 2025. Tap one for its archive.
- Red Flag Warnings
- 12
- Busiest day
- December 18, 20253 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 |
|---|---|---|---|---|
| Dec 11, 8:16 AM MST | Red Flag Warning | BOU | Adams, Arapahoe, Boulder, Broomfield, Clear Creek, Denver and 8 more | 9 hr |
| Dec 11, 10:38 AM MST | Red Flag Warning | PUB | El Paso, Huerfano, Las Animas, Pueblo | 6 hr |
| Dec 16, 3:06 AM MST | Red Flag Warning | BOU | Adams, Arapahoe, Boulder, Broomfield, Denver, Douglas and 5 more | 39 hr |
| Dec 16, 3:27 AM MST | Red Flag Warning | PUB | Baca, Bent, Crowley, El Paso, Fremont, Huerfano and 5 more | 39 hr |
| Dec 17, 12:15 PM MST | Red Flag Warning | GLD | Cheyenne, Kit Carson, Yuma | 29 hr |
| Dec 17, 12:58 PM MST | Red Flag Warning | PUB | Baca, Bent, Kiowa, Prowers | 28 hr |
| Dec 18, 2:31 AM MST | Red Flag Warning | BOU | Logan, Morgan, Phillips, Sedgwick, Washington, Weld | 14 hr |
| Dec 18, 2:30 PM MST | Red Flag Warning | PUB | Baca, Bent, Crowley, El Paso, Fremont, Huerfano and 5 more | 28 hr |
| Dec 18, 2:44 PM MST | Red Flag Warning | BOU | Adams, Arapahoe, Boulder, Broomfield, Clear Creek, Denver and 7 more | 33 hr |
| Dec 19, 6:02 PM MST | Red Flag Warning | PUB | El Paso, Fremont, Huerfano, Pueblo, Teller | 118 min |
| Dec 22, 1:48 AM MST | Red Flag Warning | BOU | Arapahoe, Boulder, Broomfield, Clear Creek, Douglas, Elbert and 5 more | 15 hr |
| Dec 22, 2:10 AM MST | Red Flag Warning | PUB | El Paso, Fremont, Huerfano, Pueblo, Teller | 15 hr |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Weld County5
- El Paso County5
- Huerfano County5
- Pueblo County5
- Arapahoe County4
- Boulder County4
- Broomfield County4
- Douglas County4
- Elbert County4
- Jefferson County4
- Larimer County4
- Fremont County4
- Adams County3
- Clear Creek County3
- Denver County3
- Gilpin County3
- Park County3
- Las Animas County3
- Baca County3
- Bent County3
- Prowers County3
- Teller County3
- Lincoln County2
- Crowley County2
- Kiowa County2
- Otero County2
- Cheyenne County1
- Kit Carson County1
- Yuma County1
- Logan County1
- Morgan County1
- Phillips County1
- Sedgwick County1
- Washington County1
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.