Alert archive / Colorado / Winter Storm Warnings / 2025
Winter Storm Warnings in Colorado, December 2025
7 winter storm 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 winter storm warnings reaches back to 2005.
Winter Storm Warnings by county
Each county as a circle sized by its count in December 2025. Tap one for its archive.
- Winter Storm Warnings
- 7
- Busiest day
- December 4, 20253 winter storm 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 2, 2:07 PM MST | Winter Storm Warning | PUB | Alamosa, Chaffee, Conejos, Costilla, Custer, Fremont and 6 more | 36 hr |
| Dec 4, 2:18 PM MST | Winter Storm Warning | PUB | Chaffee, Lake, Saguache | 57 hr |
| Dec 4, 2:21 PM MST | Winter Storm Warning | BOU | Boulder, Clear Creek, Gilpin, Grand, Jackson, Jefferson and 3 more | 57 hr |
| Dec 4, 2:39 PM MST | Winter Storm Warning | GJT | Delta, Eagle, Garfield, Gunnison, Moffat, Montrose and 3 more | 62 hr |
| Dec 26, 2:04 AM MST | Winter Storm Warning | GJT | Moffat, Routt | 51 hr |
| Dec 26, 7:13 AM MST | Winter Storm Warning | BOU | Grand, Jackson | 46 hr |
| Dec 26, 2:09 PM MST | Winter Storm Warning | PUB | Conejos, Mineral, Rio Grande | 36 hr |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Chaffee County2
- Conejos County2
- Mineral County2
- Rio Grande County2
- Saguache County2
- Grand County2
- Jackson County2
- Moffat County2
- Routt County2
- Alamosa County1
- Costilla County1
- Custer County1
- Fremont County1
- Huerfano County1
- Las Animas County1
- Pueblo County1
- Lake County1
- Boulder County1
- Clear Creek County1
- Gilpin County1
- Jefferson County1
- Larimer County1
- Park County1
- Summit County1
- Delta County1
- Eagle County1
- Garfield County1
- Gunnison County1
- Montrose County1
- Pitkin County1
- Rio Blanco 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.