Weather alerts in Colorado, December 2011

64 weather alerts in December 2011, 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 2011. Tap one for its archive.

Alerts: 64
Warnings: 17
Watches: 14
Advisories: 31
Busiest day: December 2, 20117 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 1, 9:33 PM MST	Winter Storm Watch	PUB	Baca, Bent, Kiowa, Las Animas, Prowers	18 hr
Dec 2, 3:40 AM MST	Winter Weather Advisory	PUB	Alamosa, Baca, Bent, Chaffee, Conejos, Costilla and 12 more	36 hr
Dec 2, 4:24 AM MST	Winter Storm Warning	GJT	Archuleta, Delta, Dolores, Garfield, Gunnison, Hinsdale and 7 more	43 hr
Dec 2, 4:24 AM MST	Winter Weather Advisory	GJT	Archuleta, Delta, Dolores, Eagle, Garfield, Gunnison and 10 more	43 hr
Dec 2, 4:48 AM MST	Dense Fog Advisory	BOU	Larimer, Weld	5 hr
Dec 2, 12:41 PM MST	Wind Advisory	GLD	Kit Carson, Yuma	3 hr
Dec 2, 2:05 PM MST	Winter Weather Advisory	GLD	Cheyenne, Kit Carson	27 hr
Dec 2, 7:57 PM MST	Winter Weather Advisory	BOU	Adams, Arapahoe, Boulder, Broomfield, Clear Creek, Denver and 9 more	18 hr
Dec 3, 3:20 PM MST	Winter Weather Advisory	BOU	Adams, Arapahoe, Boulder, Broomfield, Clear Creek, Denver and 8 more	32 hr
Dec 3, 3:36 PM MST	Winter Weather Advisory	PUB	Alamosa, Chaffee, Conejos, Costilla, Custer, El Paso and 10 more	41 hr
Dec 4, 3:59 AM MST	Winter Storm Warning	PUB	Alamosa, Chaffee, Costilla, Custer, Fremont, Huerfano and 4 more	29 hr
Dec 4, 2:57 PM MST	Wind Chill Advisory	GJT	Garfield, Moffat, Rio Blanco, Routt	13 hr
Dec 4, 3:50 PM MST	Wind Chill Advisory	PUB	Alamosa, Chaffee, Conejos, Costilla, Custer, El Paso and 9 more	19 hr
Dec 5, 1:15 PM MST	Wind Chill Advisory	GLD	Cheyenne, Kit Carson, Yuma	15 hr
Dec 5, 2:18 PM MST	Wind Chill Advisory	PUB	Alamosa, Bent, Chaffee, Conejos, Costilla, Crowley and 14 more	19 hr
Dec 6, 3:55 AM MST	Wind Chill Warning	GLD	Cheyenne, Kit Carson, Yuma	4 hr
Dec 9, 3:48 AM MST	Dense Fog Advisory	BOU	Adams, Arapahoe, Broomfield, Denver, Douglas, Larimer and 1 more	5 hr
Dec 9, 7:20 PM MST	Dense Fog Advisory	BOU	Adams, Arapahoe, Boulder, Broomfield, Denver, Douglas and 4 more	8 hr
Dec 11, 3:05 PM MST	Winter Storm Watch	PUB	Conejos, Mineral, Rio Grande	13 hr
Dec 11, 3:13 PM MST	Winter Storm Watch	GJT	Archuleta, Dolores, Hinsdale, La Plata, Montezuma, San Juan and 1 more	11 hr
Dec 12, 2:10 AM MST	Winter Storm Warning	GJT	Archuleta, Dolores, Hinsdale, La Plata, Montezuma, San Juan and 1 more	58 hr
Dec 12, 2:10 AM MST	Winter Weather Advisory	GJT	Delta, Dolores, Eagle, Garfield, Gunnison, Hinsdale and 9 more	60 hr
Dec 12, 4:00 AM MST	Winter Storm Watch	GLD	Cheyenne, Kit Carson	8 hr
Dec 12, 4:06 AM MST	Winter Storm Warning	PUB	Conejos, Mineral, Rio Grande	47 hr
Dec 12, 12:11 PM MST	Freezing Rain Advisory	GLD	Cheyenne, Kit Carson, Yuma	47 hr
Dec 12, 7:30 PM MST	Winter Weather Advisory	PUB	Alamosa, Conejos, Costilla, Custer, Fremont, Huerfano and 4 more	32 hr
Dec 13, 2:18 AM MST	Dense Fog Advisory	BOU	Elbert, Lincoln, Logan, Phillips, Sedgwick, Washington and 1 more	9 hr
Dec 13, 9:37 AM MST	Winter Weather Advisory	BOU	Phillips, Sedgwick	83 min
Dec 16, 8:22 AM MST	Dense Fog Advisory	GJT	Moffat, Rio Blanco, Routt	3 hr
Dec 16, 9:04 PM MST	Dense Fog Advisory	GJT	Moffat, Rio Blanco, Routt	14 hr
Dec 17, 3:14 PM MST	Winter Storm Watch	PUB	Baca, Bent, Las Animas, Otero, Prowers	24 hr
Dec 18, 3:46 AM MST	Blizzard Watch	PUB	Baca, Las Animas	12 hr
Dec 18, 4:11 AM MST	Winter Storm Watch	GLD	Cheyenne, Kit Carson	24 hr
Dec 18, 3:29 PM MST	Blizzard Warning	PUB	Baca, Bent, Costilla, Crowley, Huerfano, Kiowa and 3 more	36 hr
Dec 18, 3:29 PM MST	Winter Storm Watch	PUB	Crowley, Kiowa	6 hr
Dec 18, 3:29 PM MST	Winter Storm Warning	PUB	Crowley, Kiowa, Las Animas, Otero	12 hr
Dec 18, 3:29 PM MST	Winter Weather Advisory	PUB	Costilla, Custer, Fremont, Huerfano, Las Animas, Pueblo	18 hr
Dec 18, 9:15 PM MST	Blizzard Warning	GLD	Cheyenne	30 hr
Dec 19, 4:08 AM MST	Winter Weather Advisory	GLD	Kit Carson	23 hr
Dec 19, 4:58 AM MST	Winter Weather Advisory	BOU	Elbert, Lincoln, Logan, Phillips, Washington	23 hr
Dec 19, 9:36 AM MST	Winter Storm Warning	PUB	Costilla, Custer, Fremont, Huerfano, Las Animas, Pueblo	17 hr
Dec 19, 9:36 AM MST	Winter Weather Advisory	PUB	Alamosa, Baca, Bent, Chaffee, Costilla, Crowley and 11 more	22 hr
Dec 19, 11:07 AM MST	Winter Storm Warning	BOU	Elbert, Lincoln	17 hr
Dec 19, 11:43 AM MST	Mesoscale Discussion	SPC	Baca, Bent, Las Animas, Otero, Prowers	5 hr
Dec 20, 3:29 AM MST	Winter Weather Advisory	GLD	Cheyenne	6 hr
Dec 20, 2:00 PM MST	Winter Storm Watch	BOU	Adams, Arapahoe, Boulder, Broomfield, Clear Creek, Denver and 8 more	15 hr
Dec 20, 2:58 PM MST	Winter Storm Watch	PUB	Alamosa, Chaffee, Costilla, Custer, El Paso, Fremont and 5 more	13 hr
Dec 20, 3:37 PM MST	Winter Weather Advisory	GJT	Archuleta, Delta, Dolores, Eagle, Garfield, Gunnison and 12 more	52 hr
Dec 21, 3:44 AM MST	Winter Weather Advisory	PUB	Alamosa, Chaffee, Conejos, Costilla, Custer, El Paso and 9 more	40 hr
Dec 21, 4:33 AM MST	Winter Storm Warning	BOU	Adams, Arapahoe, Boulder, Broomfield, Clear Creek, Denver and 6 more	30 hr
Dec 21, 4:33 AM MST	Winter Weather Advisory	BOU	Adams, Arapahoe, Boulder, Clear Creek, Elbert, Gilpin and 10 more	30 hr
Dec 21, 2:23 PM MST	Winter Weather Advisory	GLD	Kit Carson, Yuma	21 hr
Dec 21, 2:35 PM MST	Winter Storm Warning	PUB	Alamosa, Chaffee, Costilla, Custer, El Paso, Fremont and 5 more	29 hr
Dec 22, 3:04 AM MST	Mesoscale Discussion	SPC	Boulder, Gilpin, Jefferson, Teller	3 hr
Dec 28, 5:24 AM MST	High Wind Watch	BOU	Boulder, Clear Creek, Douglas, Gilpin, Grand, Jackson and 4 more	5 hr
Dec 28, 10:32 AM MST	High Wind Warning	BOU	Boulder, Clear Creek, Douglas, Gilpin, Grand, Jackson and 8 more	30 hr
Dec 29, 3:03 PM MST	High Wind Watch	BOU	Adams, Arapahoe, Boulder, Broomfield, Clear Creek, Denver and 16 more	19 hr
Dec 29, 3:03 PM MST	High Wind Watch	PUB	Alamosa, Chaffee, Costilla, Custer, El Paso, Fremont and 5 more	24 hr
Dec 30, 3:07 AM MST	High Wind Watch	GLD	Cheyenne, Kit Carson, Yuma	11 hr
Dec 30, 10:15 AM MST	High Wind Warning	BOU	Adams, Arapahoe, Boulder, Broomfield, Clear Creek, Denver and 16 more	31 hr
Dec 30, 2:36 PM MST	High Wind Warning	GLD	Cheyenne, Kit Carson, Yuma	29 hr
Dec 30, 2:55 PM MST	High Wind Warning	PUB	Alamosa, Baca, Bent, Chaffee, Conejos, Costilla and 15 more	26 hr
Dec 31, 3:44 AM MST	Wind Advisory	GJT	Eagle, Garfield, Moffat, Rio Blanco, Routt	8 hr
Dec 31, 9:30 AM MST	High Wind Warning	GJT	Archuleta, Delta, Dolores, Gunnison, Hinsdale, La Plata and 5 more	5 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
Mesoscale Discussion	2
Winter
Blizzard Warning	2
Winter Storm Warning	9
Blizzard Watch	1
Winter Storm Watch	9
Freezing Rain Advisory	1
Winter Weather Advisory	18
Cold
Wind Chill Warning	1
Wind Chill Advisory	4
Wind and dust
High Wind Warning	5
High Wind Watch	4
Wind Advisory	2
Fog and smoke
Dense Fog Advisory	6

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 2010 2012

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.