Alert archive / Colorado / Winter Storm Watches / 2021
Winter Storm Watches in Colorado, December 2021
17 winter storm watches 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 winter storm watches reaches back to 2005.
Winter Storm Watches by county
Each county as a circle sized by its count in December 2021. Tap one for its archive.
- Winter Storm Watches
- 17
- Busiest day
- December 7, 20213 winter storm watches
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 7, 1:47 PM MST | Winter Storm Watch | BOU | Boulder, Grand, Jackson, Larimer | 22 hr |
| Dec 7, 2:56 PM MST | Winter Storm Watch | GJT | Archuleta, Delta, Dolores, Eagle, Garfield, Gunnison and 12 more | 21 hr |
| Dec 7, 3:01 PM MST | Winter Storm Watch | PUB | Chaffee, Conejos, Lake, Mineral, Rio Grande, Saguache | 22 hr |
| Dec 8, 12:16 PM MST | Winter Storm Watch | GJT | Archuleta, Dolores, Eagle, Garfield, La Plata, Mesa and 3 more | 24 hr |
| Dec 13, 4:01 AM MST | Winter Storm Watch | PUB | Conejos, Mineral, Rio Grande | 11 hr |
| Dec 13, 4:20 AM MST | Winter Storm Watch | GJT | Archuleta, Dolores, Hinsdale, La Plata, Montezuma, San Juan and 1 more | 10 hr |
| Dec 22, 2:47 AM MST | Winter Storm Watch | BOU | Boulder, Grand, Jackson, Larimer | 12 hr |
| Dec 22, 3:56 AM MST | Winter Storm Watch | PUB | Chaffee, Conejos, Lake, Mineral, Rio Grande, Saguache | 11 hr |
| Dec 25, 2:59 AM MST | Winter Storm Watch | GJT | Archuleta, Delta, Dolores, Eagle, Garfield, Gunnison and 12 more | 12 hr |
| Dec 25, 3:28 AM MST | Winter Storm Watch | PUB | Chaffee, Conejos, Lake, Mineral, Rio Grande, Saguache | 11 hr |
| Dec 25, 3:46 AM MST | Winter Storm Watch | BOU | Boulder, Clear Creek, Gilpin, Grand, Jackson, Jefferson and 3 more | 10 hr |
| Dec 26, 2:52 PM MST | Winter Storm Watch | PUB | Conejos, Mineral, Rio Grande | 13 hr |
| Dec 28, 1:48 PM MST | Winter Storm Watch | GJT | Archuleta, Delta, Dolores, Eagle, Garfield, Gunnison and 12 more | 25 hr |
| Dec 28, 1:59 PM MST | Winter Storm Watch | BOU | Boulder, Clear Creek, Gilpin, Grand, Jackson, Jefferson and 3 more | 23 hr |
| Dec 28, 2:48 PM MST | Winter Storm Watch | PUB | Chaffee, Conejos, Lake, Mineral, Rio Grande, Saguache | 24 hr |
| Dec 29, 2:45 PM MST | Winter Storm Watch | PUB | Alamosa, Costilla, Custer, Fremont, Huerfano, Las Animas and 1 more | 24 hr |
| Dec 30, 3:00 AM MST | Winter Storm Watch | BOU | Boulder, Broomfield, Clear Creek, Douglas, Gilpin, Jefferson and 3 more | 11 hr |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Conejos County6
- Mineral County6
- Rio Grande County6
- Boulder County5
- Larimer County5
- Archuleta County5
- Dolores County5
- La Plata County5
- Montezuma County5
- San Miguel County5
- Saguache County5
- Grand County4
- Jackson County4
- Eagle County4
- Garfield County4
- Hinsdale County4
- Mesa County4
- Pitkin County4
- San Juan County4
- Chaffee County4
- Lake County4
- Delta County3
- Gunnison County3
- Moffat County3
- Montrose County3
- Ouray County3
- Rio Blanco County3
- Routt County3
- Clear Creek County3
- Gilpin County3
- Jefferson County3
- Park County3
- Summit County2
- Alamosa County1
- Costilla County1
- Custer County1
- Fremont County1
- Huerfano County1
- Las Animas County1
- Broomfield County1
2 more counties
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. Warning verification from the Mesonet's Cow. Rebuilt daily.