Weather alerts in Colorado, December 2021

142 weather alerts in December 2021, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered any part of the state, so the counties below add up to more than the state.

Weather alerts by county

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

Alerts: 142
Warnings: 69
Watches: 36
Advisories: 25
Busiest day: December 15, 202125 alerts

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, 2:49 AM MST	High Wind Watch	BOU	Boulder, Clear Creek, Douglas, Gilpin, Grand, Jackson and 4 more	12 hr
Dec 4, 3:45 AM MST	Fire Weather Watch	PUB	Fremont, Huerfano, Las Animas, Pueblo	11 hr
Dec 4, 2:40 PM MST	Red Flag Warning	PUB	Costilla, Crowley, Custer, El Paso, Fremont, Huerfano and 5 more	26 hr
Dec 4, 2:41 PM MST	High Wind Warning	BOU	Boulder, Clear Creek, Douglas, Gilpin, Grand, Jackson and 4 more	20 hr
Dec 5, 3:21 AM MST	Red Flag Warning	BOU	Adams, Arapahoe, Boulder, Broomfield, Clear Creek, Denver and 10 more	12 hr
Dec 5, 3:08 PM MST	Winter Weather Advisory	GJT	Delta, Eagle, Garfield, Gunnison, Hinsdale, Moffat and 5 more	45 hr
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, 4:08 AM MST	High Wind Watch	PUB	Costilla, Huerfano, Las Animas	6 hr
Dec 8, 10:32 AM MST	High Wind Warning	PUB	Costilla, Huerfano, Las Animas	18 hr
Dec 8, 11:25 AM MST	Winter Storm Warning	BOU	Boulder, Grand, Jackson, Larimer	54 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, 12:16 PM MST	Winter Storm Watch	GJT	Archuleta, Dolores, Eagle, Garfield, La Plata, Mesa and 3 more	24 hr
Dec 8, 12:16 PM MST	Winter Storm Warning	GJT	Archuleta, Delta, Dolores, Eagle, Garfield, Gunnison and 12 more	54 hr
Dec 8, 12:54 PM MST	Winter Storm Warning	PUB	Chaffee, Conejos, Lake, Mineral, Rio Grande, Saguache	52 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 10, 4:05 AM MST	High Wind Watch	BOU	Boulder, Clear Creek, Douglas, Gilpin, Grand, Jackson and 4 more	10 hr
Dec 10, 1:56 PM MST	High Wind Warning	BOU	Boulder, Clear Creek, Douglas, Gilpin, Grand, Jackson and 4 more	37 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 12, 5:00 PM MST	Fire Weather Watch	PUB	Baca, Bent, Kiowa, Las Animas, Prowers	23 hr
Dec 13, 2:04 AM MST	High Wind Watch	GLD	Cheyenne, Kit Carson, Yuma	24 hr
Dec 13, 2:07 AM MST	Fire Weather Watch	GLD	Cheyenne, Kit Carson	29 hr
Dec 13, 3:58 AM MST	High Wind Watch	PUB	Alamosa, Baca, Bent, Chaffee, Conejos, Costilla and 13 more	24 hr
Dec 13, 4:01 AM MST	Winter Storm Watch	PUB	Conejos, Mineral, Rio Grande	11 hr
Dec 13, 4:07 AM MST	Fire Weather Watch	PUB	Baca, Bent, Crowley, Huerfano, Kiowa, Las Animas and 3 more	24 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 13, 2:20 PM MST	High Wind Watch	BOU	Adams, Arapahoe, Boulder, Broomfield, Clear Creek, Denver and 13 more	14 hr
Dec 13, 2:31 PM MST	Winter Storm Warning	GJT	Archuleta, Dolores, Hinsdale, La Plata, Montezuma, San Juan and 1 more	47 hr
Dec 13, 2:31 PM MST	Winter Weather Advisory	GJT	Archuleta, Delta, Eagle, Garfield, Gunnison, Hinsdale and 9 more	53 hr
Dec 13, 2:38 PM MST	High Wind Watch	GJT	Archuleta, Dolores, La Plata, Mesa, Montezuma, Montrose and 1 more	13 hr
Dec 13, 3:17 PM MST	Winter Storm Warning	PUB	Conejos, Mineral, Rio Grande	47 hr
Dec 13, 3:17 PM MST	Winter Weather Advisory	PUB	Alamosa, Chaffee, Conejos, Costilla, Custer, Fremont and 6 more	50 hr
Dec 13, 3:39 PM MST	Red Flag Warning	PUB	Baca, Bent, Kiowa, Las Animas, Prowers	26 hr
Dec 14, 1:57 AM MST	High Wind Warning	GLD	Cheyenne, Kit Carson, Yuma	41 hr
Dec 14, 3:41 AM MST	Wind Advisory	GJT	Delta, Dolores, Eagle, Garfield, Gunnison, Mesa and 7 more	28 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, 3:53 AM MST	High Wind Warning	PUB	Alamosa, Baca, Bent, Chaffee, Conejos, Costilla and 13 more	37 hr
Dec 14, 4:34 AM MST	High Wind Warning	BOU	Adams, Arapahoe, Boulder, Broomfield, Clear Creek, Denver and 13 more	36 hr
Dec 14, 7:35 AM MST	Red Flag Warning	GLD	Cheyenne, Kit Carson	36 hr
Dec 14, 11:54 AM MST	Winter Weather Advisory	BOU	Boulder, Clear Creek, Gilpin, Grand, Jackson, Jefferson and 3 more	32 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, 2:27 AM MST	Special Weather Statement	GJT	Mesa	33 min
Dec 15, 3:07 AM MST	Special Weather Statement	GJT	Delta, Garfield, Mesa, Montrose	38 min
Dec 15, 3:07 AM MST	Special Weather Statement	GJT	Dolores, Montezuma	38 min
Dec 15, 3:51 AM MST	Special Weather Statement	GJT	La Plata, San Juan	39 min
Dec 15, 3:57 AM MST	Special Weather Statement	GJT	Delta, Garfield, Ouray	33 min
Dec 15, 4:35 AM MST	Special Weather Statement	GJT	Archuleta, Delta, Garfield, Gunnison, Hinsdale, La Plata and 3 more	40 min
Dec 15, 5:31 AM MST	Snow Squall Warning	GJT	Eagle, Garfield, Mesa, Pitkin, Rio Blanco	44 min
Dec 15, 6:02 AM MST	Snow Squall Warning	PUB	Alamosa, Conejos, Costilla, Rio Grande, Saguache	43 min
Dec 15, 6:03 AM MST	Snow Squall Warning	BOU	Summit	57 min
Dec 15, 6:10 AM MST	Snow Squall Warning	GJT	Eagle	50 min
Dec 15, 6:42 AM MST	Mesoscale Discussion	SPC	Bent, Crowley, Huerfano, Las Animas, Otero, Pueblo	93 min
Dec 15, 6:49 AM MST	Snow Squall Warning	BOU	Clear Creek, Gilpin, Grand, Summit	56 min
Dec 15, 7:01 AM MST	Snow Squall Warning	PUB	Las Animas	44 min
Dec 15, 7:11 AM MST	Dust Storm Warning	PUB	Pueblo	49 min
Dec 15, 7:22 AM MST	Severe Thunderstorm Warning Destructive damage threat	PUB	Crowley, El Paso, Huerfano, Las Animas, Otero, Pueblo	23 min
Dec 15, 7:47 AM MST	Special Weather Statement	BOU	Boulder, Broomfield, Denver, Jefferson	43 min
Dec 15, 8:12 AM MST	Special Weather Statement	BOU	Douglas	48 min
Dec 15, 8:30 AM MST	Snow Squall Warning	PUB	El Paso	45 min
Dec 15, 8:41 AM MST	Dust Storm Warning	GLD	Cheyenne, Kit Carson	2 hr
Dec 15, 9:04 AM MST	Dust Storm Warning	PUB	Crowley, El Paso, Pueblo	26 min
Dec 15, 9:27 AM MST	Dust Storm Warning	PUB	Bent, Crowley, El Paso, Kiowa, Otero, Pueblo	63 min
Dec 15, 9:59 AM MST	Blowing Dust Advisory	PUB	Baca, Bent, Crowley, Custer, El Paso, Fremont and 7 more	6 hr
Dec 15, 10:08 AM MST	Dust Storm Warning	GLD	Yuma	2 hr
Dec 15, 11:07 AM MST	Blowing Dust Warning	GLD	Cheyenne, Kit Carson, Yuma	6 hr
Dec 15, 11:34 AM MST	Blowing Dust Warning	PUB	Baca, Bent, Crowley, Kiowa, Las Animas, Otero and 1 more	4 hr
Dec 15, 10:34 PM MST	Red Flag Warning	PUB	Huerfano, Las Animas	22 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 19, 2:53 PM MST	Fire Weather Watch	PUB	Fremont, Huerfano	23 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	Fire Weather Watch	PUB	El Paso, Fremont, Huerfano, Teller	25 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, 2:47 AM MST	Winter Storm Watch	BOU	Boulder, Grand, Jackson, Larimer	12 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, 3:34 AM MST	Winter Storm Warning	GJT	Archuleta, Delta, Dolores, Eagle, Garfield, Gunnison and 12 more	3 days
Dec 22, 3:34 AM MST	Winter Weather Advisory	GJT	Archuleta, Delta, Eagle, Garfield, Mesa, Moffat and 6 more	3 days
Dec 22, 3:56 AM MST	Winter Storm Watch	PUB	Chaffee, Conejos, Lake, Mineral, Rio Grande, Saguache	11 hr
Dec 22, 2:33 PM MST	Winter Storm Warning	BOU	Boulder, Clear Creek, Gilpin, Grand, Jackson, Jefferson and 3 more	68 hr
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 Storm Warning	PUB	Chaffee, Conejos, Costilla, Huerfano, Lake, Las Animas and 3 more	67 hr
Dec 22, 3:09 PM MST	Winter Weather Advisory	PUB	Alamosa, Chaffee, Conejos, Costilla, Custer, Fremont and 6 more	67 hr
Dec 22, 3:15 PM MST	High Wind Watch	PUB	Alamosa, Bent, Chaffee, Costilla, Custer, El Paso and 7 more	13 hr
Dec 22, 4:26 PM MST	Areal Flood Advisory	GJT	Eagle, Garfield, Pitkin	3 hr
Dec 22, 5:01 PM MST	Red Flag Warning	PUB	Huerfano	119 min
Dec 23, 4:02 AM MST	High Wind Warning	PUB	Alamosa, Bent, Chaffee, Costilla, Custer, El Paso and 7 more	38 hr
Dec 24, 12:33 PM MST	Fire Weather Watch	GLD	Cheyenne, Kit Carson, Yuma	38 hr
Dec 24, 2:48 PM MST	Fire Weather Watch	PUB	Baca, Bent, Crowley, El Paso, Huerfano, Kiowa and 4 more	24 hr
Dec 24, 4:49 PM MST	Special Weather Statement	PUB	El Paso	26 min
Dec 24, 5:05 PM MST	Special Weather Statement	PUB	El Paso	10 min
Dec 24, 10:51 PM MST	Dense Fog Advisory	GJT	Delta, Garfield, Gunnison, Mesa, Montrose	14 hr
Dec 25, 2:59 AM MST	Winter Storm Watch	GJT	Archuleta, Delta, Dolores, Eagle, Garfield, Gunnison and 12 more	12 hr
Dec 25, 3:25 AM MST	Fire Weather Watch	BOU	Arapahoe, Douglas, Elbert, Lincoln, Washington	12 hr
Dec 25, 3:28 AM MST	Winter Storm Watch	PUB	Chaffee, Conejos, Lake, Mineral, Rio Grande, Saguache	11 hr
Dec 25, 3:32 AM MST	High Wind Watch	PUB	Alamosa, Chaffee, Conejos, Costilla, Custer, Fremont and 6 more	12 hr
Dec 25, 3:39 AM MST	Red Flag Warning	PUB	El Paso, Fremont, Pueblo	13 hr
Dec 25, 3:46 AM MST	Winter Storm Watch	BOU	Boulder, Clear Creek, Gilpin, Grand, Jackson, Jefferson and 3 more	10 hr
Dec 25, 1:15 PM MST	Red Flag Warning	GLD	Cheyenne, Kit Carson, Yuma	28 hr
Dec 25, 1:48 PM MST	Winter Storm Warning	BOU	Grand, Jackson	66 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, 2:52 PM MST	Red Flag Warning	PUB	Baca, Bent, Crowley, El Paso, Huerfano, Kiowa and 4 more	26 hr
Dec 25, 2:56 PM MST	Winter Storm Warning	PUB	Chaffee, Conejos, Lake, Mineral, Rio Grande, Saguache	4 days
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 Storm Warning	GJT	Archuleta, Delta, Dolores, Eagle, Garfield, Gunnison and 11 more	4 days
Dec 25, 2:59 PM MST	Winter Weather Advisory	GJT	Delta, Eagle, Garfield, Gunnison, Hinsdale, Mesa and 7 more	4 days
Dec 25, 3:02 PM MST	Wind Advisory	GJT	Delta, Dolores, Garfield, Gunnison, Mesa, Moffat and 3 more	25 hr
Dec 25, 3:02 PM MST	High Wind Warning	PUB	Alamosa, Bent, Chaffee, Conejos, Costilla, Crowley and 10 more	27 hr
Dec 25, 3:34 PM MST	Red Flag Warning	BOU	Elbert, Lincoln	25 hr
Dec 26, 3:08 AM MST	High Wind Warning	BOU	Adams, Arapahoe, Douglas, Elbert, Lincoln, Washington	14 hr
Dec 26, 11:00 AM MST	Mesoscale Discussion	SPC	Garfield, Mesa, Moffat, Rio Blanco, Routt	3 hr
Dec 26, 11:19 AM MST	Snow Squall Warning	GJT	Moffat, Rio Blanco	26 min
Dec 26, 11:45 AM MST	Snow Squall Warning	GJT	Garfield, Moffat, Rio Blanco	30 min
Dec 26, 12:11 PM MST	Snow Squall Warning	GJT	Garfield, Rio Blanco	34 min
Dec 26, 12:14 PM MST	Snow Squall Warning	GJT	Moffat	31 min
Dec 26, 12:43 PM MST	Snow Squall Warning	GJT	Garfield, Moffat, Rio Blanco, Routt	32 min
Dec 26, 1:07 PM MST	Snow Squall Warning	GJT	Moffat, Routt	23 min
Dec 26, 1:33 PM MST	Snow Squall Warning	BOU	Grand	57 min
Dec 26, 1:37 PM MST	Snow Squall Warning	GJT	Routt	23 min
Dec 26, 1:40 PM MST	Snow Squall Warning	GJT	Garfield, Mesa	35 min
Dec 26, 1:56 PM MST	Snow Squall Warning	GJT	Routt	34 min
Dec 26, 2:05 PM MST	Snow Squall Warning	GJT	Garfield	25 min
Dec 26, 2:39 PM MST	Snow Squall Warning	GJT	Eagle, Garfield, Pitkin	21 min
Dec 26, 2:52 PM MST	Winter Storm Watch	PUB	Conejos, Mineral, Rio Grande	13 hr
Dec 26, 2:59 PM MST	Snow Squall Warning	GJT	Eagle, Garfield, Pitkin	31 min
Dec 27, 4:02 AM MST	Winter Weather Advisory	GJT	Archuleta, Dolores, Eagle, Garfield, La Plata, Mesa and 6 more	52 hr
Dec 28, 1:44 PM MST	High Wind Watch	BOU	Boulder, Grand, Jackson, Larimer	24 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, 1:18 PM MST	Winter Storm Warning	BOU	Boulder, Broomfield, Clear Creek, Douglas, Gilpin, Grand and 6 more	70 hr
Dec 29, 1:36 PM MST	High Wind Warning	BOU	Boulder, Broomfield, Clear Creek, Douglas, Gilpin, Grand and 5 more	30 hr
Dec 29, 2:45 PM MST	Winter Storm Watch	PUB	Alamosa, Costilla, Custer, Fremont, Huerfano, Las Animas and 1 more	24 hr
Dec 29, 2:45 PM MST	Winter Storm Warning	PUB	Alamosa, Chaffee, Conejos, Costilla, Custer, Fremont and 6 more	3 days
Dec 29, 2:53 PM MST	Winter Storm Warning	GJT	Archuleta, Delta, Dolores, Eagle, Garfield, Gunnison and 12 more	72 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 Storm Watch	BOU	Boulder, Broomfield, Clear Creek, Douglas, Gilpin, Jefferson and 3 more	11 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 product

Every kind of product issued here, grouped by hazard. Each opens the same place narrowed to that product.

Product	Alerts
Severe storms
Severe Thunderstorm Warning	1
Mesoscale Discussion	2
Special Weather Statement	10
Flooding
Areal Flood Advisory	1
Winter
Snow Squall Warning	20
Winter Storm Warning	14
Winter Storm Watch	17
Winter Weather Advisory	20
Wind and dust
Blowing Dust Warning	2
Dust Storm Warning	5
High Wind Warning	10
High Wind Watch	10
Blowing Dust Advisory	1
Wind Advisory	2
Fire
Red Flag Warning	17
Fire Weather Watch	9
Fog and smoke
Dense Fog Advisory	1

By county

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

24 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. Rebuilt daily.