Alert archive / Colorado / Winter Storm Watches / 2021
Winter Storm Watches in Colorado, March 2021
7 winter storm watches in March 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 March 2021. Tap one for its archive.
- Winter Storm Watches
- 7
- Busiest day
- March 11, 20212 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 |
|---|---|---|---|---|
| Mar 10, 2:40 PM MST | Winter Storm Watch | BOU | Adams, Arapahoe, Boulder, Broomfield, Clear Creek, Denver and 16 more | 48 hr |
| Mar 11, 3:22 AM MST | Winter Storm Watch | GJT | Archuleta, Delta, Dolores, Eagle, Garfield, Gunnison and 12 more | 24 hr |
| Mar 11, 3:55 AM MST | Winter Storm Watch | PUB | Alamosa, Chaffee, Conejos, Costilla, Custer, El Paso and 9 more | 35 hr |
| Mar 15, 3:56 AM MDT | Winter Storm Watch | PUB | Alamosa, Baca, Chaffee, Costilla, Custer, Fremont and 4 more | 31 hr |
| Mar 20, 2:11 PM MDT | Winter Storm Watch | BOU | Adams, Arapahoe, Boulder, Broomfield, Denver, Douglas and 2 more | 13 hr |
| Mar 20, 2:52 PM MDT | Winter Storm Watch | PUB | Alamosa, Chaffee, Costilla, Custer, El Paso, Fremont and 5 more | 13 hr |
| Mar 22, 2:57 PM MDT | Winter Storm Watch | PUB | Conejos, Costilla, Huerfano, Las Animas, Mineral, Rio Grande | 13 hr |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Costilla County4
- Huerfano County4
- Las Animas County4
- Alamosa County3
- Chaffee County3
- Custer County3
- Fremont County3
- Pueblo County3
- Saguache County3
- Adams County2
- Arapahoe County2
- Boulder County2
- Broomfield County2
- Denver County2
- Douglas County2
- Elbert County2
- Jefferson County2
- Conejos County2
- El Paso County2
- Mineral County2
- Rio Grande County2
- Teller County2
- Clear Creek County1
- Gilpin County1
- Grand County1
- Jackson County1
- Larimer County1
- Lincoln County1
- Logan County1
- Morgan County1
- Park County1
- Phillips County1
- Sedgwick County1
- Summit County1
- Washington County1
- Weld County1
- Archuleta County1
- Delta County1
- Dolores County1
- Eagle 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. Warning verification from the Mesonet's Cow. Rebuilt daily.