Alert archive / Colorado / Winter Weather Advisories / 2021

Winter Weather Advisories in Colorado, December 2021

20 winter weather advisories 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 weather advisories reaches back to 2005.

Winter Weather Advisories by county

Each county as a circle sized by its count in December 2021. Tap one for its archive.

Winter Weather Advisories: 20
Busiest day: December 22, 20213 winter weather advisories

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 5, 3:08 PM MST	Winter Weather Advisory	GJT	Delta, Eagle, Garfield, Gunnison, Hinsdale, Moffat and 5 more	45 hr
Dec 8, 11:25 AM MST	Winter Weather Advisory	BOU	Boulder, Clear Creek, Gilpin, Grand, Jefferson, Park and 1 more	54 hr
Dec 8, 12:54 PM MST	Winter Weather Advisory	PUB	Chaffee, Lake, Mineral, Rio Grande, Saguache	52 hr
Dec 9, 12:37 PM MST	Winter Weather Advisory	GJT	Archuleta, Eagle, Garfield, La Plata, Mesa, Pitkin	21 hr
Dec 13, 2:31 PM MST	Winter Weather Advisory	GJT	Archuleta, Delta, Eagle, Garfield, Gunnison, Hinsdale and 9 more	53 hr
Dec 13, 3:17 PM MST	Winter Weather Advisory	PUB	Alamosa, Chaffee, Conejos, Costilla, Custer, Fremont and 6 more	50 hr
Dec 14, 11:54 AM MST	Winter Weather Advisory	BOU	Boulder, Clear Creek, Gilpin, Grand, Jackson, Jefferson and 3 more	32 hr
Dec 16, 3:23 AM MST	Winter Weather Advisory	GJT	Moffat, Routt	33 hr
Dec 16, 3:27 AM MST	Winter Weather Advisory	BOU	Grand, Jackson	33 hr
Dec 22, 3:34 AM MST	Winter Weather Advisory	GJT	Archuleta, Delta, Eagle, Garfield, Mesa, Moffat and 6 more	3 days
Dec 22, 2:33 PM MST	Winter Weather Advisory	BOU	Boulder, Clear Creek, Gilpin, Grand, Jackson, Jefferson and 2 more	66 hr
Dec 22, 3:09 PM MST	Winter Weather Advisory	PUB	Alamosa, Chaffee, Conejos, Costilla, Custer, Fremont and 6 more	67 hr
Dec 25, 1:48 PM MST	Winter Weather Advisory	BOU	Boulder, Clear Creek, Gilpin, Grand, Jackson, Jefferson and 3 more	66 hr
Dec 25, 2:56 PM MST	Winter Weather Advisory	PUB	Chaffee, Conejos, Lake, Mineral, Rio Grande, Saguache	4 days
Dec 25, 2:59 PM MST	Winter Weather Advisory	GJT	Delta, Eagle, Garfield, Gunnison, Hinsdale, Mesa and 7 more	4 days
Dec 27, 4:02 AM MST	Winter Weather Advisory	GJT	Archuleta, Dolores, Eagle, Garfield, La Plata, Mesa and 6 more	52 hr
Dec 29, 2:53 PM MST	Winter Weather Advisory	GJT	Delta, Dolores, Eagle, Garfield, Gunnison, Mesa and 6 more	62 hr
Dec 30, 3:00 AM MST	Winter Weather Advisory	BOU	Grand, Jackson, Summit	11 hr
Dec 30, 3:48 AM MST	Winter Weather Advisory	PUB	Lake, Mineral, Rio Grande, Saguache	55 hr
Dec 30, 1:57 PM MST	Winter Weather Advisory	BOU	Adams, Arapahoe, Broomfield, Denver, Douglas, Elbert and 7 more	45 hr

By county

Every county with at least one alert. A county page lists each alert that covered it.

11 more counties

Nearby

Alerts in force now Tornadoes on record The radar archive 2020 2022

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.