Alert archive / Colorado / Red Flag Warnings / 2021
Red Flag Warnings in Colorado, December 2021
17 red flag warnings in December 2021. 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 2021. Tap one for its archive.
- Red Flag Warnings
- 17
- Busiest day
- December 25, 20214 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 4, 2:40 PM MST | Red Flag Warning | PUB | Costilla, Crowley, Custer, El Paso, Fremont, Huerfano and 5 more | 26 hr |
| Dec 5, 3:21 AM MST | Red Flag Warning | BOU | Adams, Arapahoe, Boulder, Broomfield, Clear Creek, Denver and 10 more | 12 hr |
| Dec 11, 3:13 PM MST | Red Flag Warning | PUB | Baca, El Paso, Fremont, Huerfano, Las Animas, Pueblo and 1 more | 26 hr |
| Dec 13, 3:39 PM MST | Red Flag Warning | PUB | Baca, Bent, Kiowa, Las Animas, Prowers | 26 hr |
| Dec 14, 3:51 AM MST | Red Flag Warning | PUB | Baca, Bent, Crowley, El Paso, Huerfano, Kiowa and 4 more | 37 hr |
| Dec 14, 7:35 AM MST | Red Flag Warning | GLD | Cheyenne, Kit Carson | 36 hr |
| Dec 14, 12:17 PM MST | Red Flag Warning | BOU | Adams, Arapahoe, Boulder, Broomfield, Clear Creek, Denver and 10 more | 29 hr |
| Dec 15, 10:34 PM MST | Red Flag Warning | PUB | Huerfano, Las Animas | 22 hr |
| Dec 20, 1:08 PM MST | Red Flag Warning | BOU | Boulder, Clear Creek, Douglas, Gilpin, Jefferson, Larimer and 2 more | 28 hr |
| Dec 20, 2:10 PM MST | Red Flag Warning | PUB | Costilla, Custer, El Paso, Fremont, Huerfano, Las Animas and 3 more | 27 hr |
| Dec 21, 3:02 PM MST | Red Flag Warning | PUB | El Paso, Fremont, Huerfano, Teller | 26 hr |
| Dec 22, 3:11 AM MST | Red Flag Warning | BOU | Boulder, Clear Creek, Douglas, Gilpin, Jefferson, Larimer and 3 more | 14 hr |
| Dec 22, 5:01 PM MST | Red Flag Warning | PUB | Huerfano | 119 min |
| Dec 25, 3:39 AM MST | Red Flag Warning | PUB | El Paso, Fremont, Pueblo | 13 hr |
| Dec 25, 1:15 PM MST | Red Flag Warning | GLD | Cheyenne, Kit Carson, Yuma | 28 hr |
| Dec 25, 2:52 PM MST | Red Flag Warning | PUB | Baca, Bent, Crowley, El Paso, Huerfano, Kiowa and 4 more | 26 hr |
| Dec 25, 3:34 PM MST | Red Flag Warning | BOU | Elbert, Lincoln | 25 hr |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Huerfano County8
- El Paso County7
- Las Animas County7
- Pueblo County6
- Fremont County5
- Teller County4
- Boulder County4
- Clear Creek County4
- Douglas County4
- Gilpin County4
- Jefferson County4
- Larimer County4
- Park County4
- Weld County4
- Baca County4
- Crowley County3
- Otero County3
- Elbert County3
- Lincoln County3
- Bent County3
- Kiowa County3
- Prowers County3
- Costilla County2
- Custer County2
- Saguache County2
- Adams County2
- Arapahoe County2
- Broomfield County2
- Denver County2
- Morgan County2
- Washington County2
- Cheyenne County2
- Kit Carson County2
- Logan County1
- Yuma County1
Nearby
Alerts in force nowTornadoes on recordThe radar archive20202022
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.