Weather alerts in Colorado, December 2009

64 weather alerts in December 2009, 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 2009. Tap one for its archive.

Alerts: 64
Warnings: 16
Watches: 12
Advisories: 35
Busiest day: December 5, 20097 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 2, 4:38 AM MST	Winter Weather Advisory	PUB	Costilla, Custer, Fremont, Huerfano, Las Animas, Pueblo	30 hr
Dec 4, 3:26 PM MST	Winter Weather Advisory	GJT	Delta, Eagle, Garfield, Gunnison, Moffat, Montrose and 3 more	61 hr
Dec 5, 4:26 AM MST	Blizzard Watch	GJT	Archuleta, Delta, Dolores, Gunnison, Hinsdale, La Plata and 6 more	12 hr
Dec 5, 4:26 AM MST	Winter Storm Watch	GJT	Archuleta, Delta, Dolores, Eagle, Garfield, Gunnison and 9 more	45 hr
Dec 5, 10:22 AM MST	Winter Weather Advisory	BOU	Adams, Arapahoe, Boulder, Broomfield, Clear Creek, Denver and 10 more	24 hr
Dec 5, 4:05 PM MST	Blizzard Watch	PUB	Conejos, Mineral, Rio Grande, Saguache	4 hr
Dec 5, 4:05 PM MST	Winter Storm Watch	PUB	Chaffee, Conejos, Lake, Mineral, Rio Grande, Saguache	13 hr
Dec 5, 4:05 PM MST	Winter Weather Advisory	PUB	Chaffee, Lake, Saguache	26 hr
Dec 5, 4:07 PM MST	Blizzard Warning	GJT	Archuleta, Delta, Dolores, Garfield, Gunnison, Hinsdale and 7 more	71 hr
Dec 5, 8:26 PM MST	Blizzard Warning	PUB	Conejos, Mineral, Rio Grande, Saguache	69 hr
Dec 6, 5:13 AM MST	Winter Storm Warning	PUB	Alamosa, Chaffee, Conejos, Costilla, Custer, Fremont and 6 more	60 hr
Dec 6, 2:20 PM MST	Winter Storm Warning	GJT	Archuleta, Delta, Dolores, Eagle, Garfield, Gunnison and 9 more	49 hr
Dec 6, 2:20 PM MST	Winter Weather Advisory	GJT	Routt	11 hr
Dec 6, 8:32 PM MST	Winter Weather Advisory	PUB	Alamosa, Baca, Bent, Chaffee, Conejos, Costilla and 15 more	62 hr
Dec 7, 3:30 AM MST	Winter Storm Warning	GLD	Cheyenne, Kit Carson	41 hr
Dec 7, 5:21 AM MST	Winter Weather Advisory	BOU	Adams, Arapahoe, Boulder, Broomfield, Clear Creek, Denver and 16 more	47 hr
Dec 7, 11:00 AM MST	Winter Storm Watch	GLD	Cheyenne, Kit Carson, Yuma	8 hr
Dec 7, 6:57 PM MST	Winter Weather Advisory	GLD	Cheyenne, Kit Carson, Yuma	26 hr
Dec 7, 10:01 PM MST	Mesoscale Discussion	SPC	Archuleta, Conejos, Dolores, Hinsdale, La Plata, Mineral and 2 more	5 hr
Dec 8, 12:53 PM MST	Wind Chill Advisory	BOU	Adams, Arapahoe, Douglas, Elbert, Lincoln, Logan and 5 more	9 hr
Dec 8, 3:20 PM MST	Wind Chill Advisory	PUB	Alamosa, Baca, Bent, Chaffee, Conejos, Costilla and 15 more	41 hr
Dec 8, 3:25 PM MST	Winter Weather Advisory	GJT	Archuleta, Delta, Dolores, Eagle, Garfield, Gunnison and 12 more	35 hr
Dec 8, 8:55 PM MST	Wind Chill Warning	GLD	Cheyenne, Kit Carson, Yuma	12 hr
Dec 9, 2:30 AM MST	Wind Chill Advisory	GLD	Cheyenne	7 hr
Dec 9, 4:31 AM MST	Wind Chill Warning	BOU	Boulder, Clear Creek, Gilpin, Grand, Jackson, Jefferson and 3 more	28 hr
Dec 9, 4:31 AM MST	Wind Chill Advisory	BOU	Adams, Arapahoe, Boulder, Broomfield, Denver, Douglas and 1 more	4 hr
Dec 9, 11:06 AM MST	Winter Weather Advisory	PUB	Chaffee, Conejos, Lake, Mineral, Rio Grande, Saguache	11 hr
Dec 9, 2:13 PM MST	Wind Chill Advisory	GLD	Cheyenne, Kit Carson, Yuma	19 hr
Dec 10, 2:41 AM MST	Winter Weather Advisory	BOU	Boulder, Broomfield, Clear Creek, Douglas, Gilpin, Jefferson and 3 more	8 hr
Dec 11, 3:06 PM MST	Winter Storm Watch	GJT	Archuleta, Delta, Dolores, Eagle, Garfield, Gunnison and 11 more	13 hr
Dec 11, 3:13 PM MST	Winter Storm Watch	PUB	Chaffee, Conejos, Lake, Mineral, Rio Grande, Saguache	24 hr
Dec 12, 4:05 AM MST	Winter Storm Warning	GJT	Archuleta, Delta, Dolores, Eagle, Garfield, Gunnison and 12 more	53 hr
Dec 12, 4:05 AM MST	Winter Weather Advisory	GJT	Delta, Eagle, Garfield, Gunnison, Mesa, Moffat and 4 more	53 hr
Dec 12, 2:41 PM MST	Winter Weather Advisory	BOU	Boulder, Clear Creek, Gilpin, Grand, Jackson, Jefferson and 3 more	42 hr
Dec 12, 2:43 PM MST	Winter Storm Warning	PUB	Chaffee, Conejos, Lake, Mineral, Rio Grande, Saguache	39 hr
Dec 12, 2:43 PM MST	Winter Weather Advisory	PUB	Chaffee, Conejos, Lake, Mineral, Rio Grande, Saguache	39 hr
Dec 13, 12:48 AM MST	High Wind Warning	PUB	El Paso	7 hr
Dec 17, 9:40 PM MST	Dense Fog Advisory	GJT	Garfield, Mesa	13 hr
Dec 18, 8:21 PM MST	Dense Fog Advisory	GJT	Garfield, Gunnison, Mesa, Moffat, Montrose, Rio Blanco and 1 more	15 hr
Dec 21, 3:05 AM MST	Winter Storm Watch	GJT	Archuleta, Dolores, Gunnison, Hinsdale, La Plata, Montezuma and 4 more	12 hr
Dec 21, 3:25 AM MST	Winter Storm Watch	GLD	Cheyenne, Kit Carson, Yuma	10 hr
Dec 21, 3:56 AM MST	Winter Storm Watch	BOU	Elbert, Lincoln, Logan, Phillips, Sedgwick, Washington	16 hr
Dec 21, 4:45 AM MST	Winter Storm Watch	PUB	Conejos, Kiowa, Mineral, Rio Grande	25 hr
Dec 21, 1:54 PM MST	Winter Storm Warning	GLD	Cheyenne, Kit Carson, Yuma	63 hr
Dec 21, 3:08 PM MST	Winter Weather Advisory	GJT	Archuleta, Delta, Dolores, Eagle, Garfield, Gunnison and 12 more	63 hr
Dec 21, 7:53 PM MST	Winter Storm Warning	BOU	Elbert, Lincoln, Logan, Phillips, Sedgwick, Washington	43 hr
Dec 21, 7:53 PM MST	Winter Weather Advisory	BOU	Adams, Arapahoe, Boulder, Broomfield, Clear Creek, Denver and 16 more	61 hr
Dec 21, 8:45 PM MST	Winter Storm Warning	PUB	Conejos, Kiowa, Mineral, Rio Grande	38 hr
Dec 21, 8:45 PM MST	Winter Weather Advisory	PUB	Alamosa, Baca, Bent, Chaffee, Conejos, Costilla and 15 more	66 hr
Dec 21, 10:39 PM MST	Winter Storm Warning	GJT	Archuleta, Dolores, Hinsdale, La Plata, Montezuma, San Juan and 1 more	37 hr
Dec 22, 5:19 AM MST	Winter Storm Watch	PUB	Baca, Bent, Crowley, Las Animas, Otero, Prowers	6 hr
Dec 23, 3:57 AM MST	Dense Fog Advisory	GJT	Garfield, Mesa	6 hr
Dec 23, 11:34 AM MST	Winter Storm Warning	GJT	Delta, Garfield, Mesa	18 hr
Dec 23, 12:32 PM MST	Winter Weather Advisory	GLD	Cheyenne, Kit Carson, Yuma	28 hr
Dec 24, 2:37 PM MST	Wind Chill Advisory	PUB	Alamosa, Chaffee, Conejos, Costilla, Custer, El Paso and 8 more	17 hr
Dec 24, 3:21 PM MST	Winter Weather Advisory	GJT	Eagle, Garfield, Moffat, Pitkin, Rio Blanco, Routt	39 hr
Dec 24, 3:52 PM MST	Winter Weather Advisory	BOU	Adams, Arapahoe, Elbert, Lincoln, Logan, Morgan and 4 more	49 hr
Dec 24, 8:54 PM MST	Wind Chill Advisory	GLD	Cheyenne, Kit Carson, Yuma	12 hr
Dec 24, 8:54 PM MST	Wind Advisory	GLD	Cheyenne, Kit Carson, Yuma	20 hr
Dec 25, 9:32 AM MST	Winter Weather Advisory	GLD	Cheyenne, Kit Carson, Yuma	31 hr
Dec 29, 3:13 PM MST	Winter Weather Advisory	GJT	Archuleta, Delta, Dolores, Eagle, Garfield, Gunnison and 12 more	37 hr
Dec 30, 4:09 AM MST	Winter Weather Advisory	PUB	Chaffee, Conejos, Lake, Mineral, Rio Grande, Saguache	24 hr
Dec 30, 4:16 AM MST	Winter Storm Warning	GJT	Dolores, Montezuma, San Miguel	24 hr
Dec 30, 10:24 AM MST	Winter Weather Advisory	BOU	Grand, Jackson	17 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	1
Winter
Blizzard Warning	2
Winter Storm Warning	11
Blizzard Watch	2
Winter Storm Watch	10
Winter Weather Advisory	24
Cold
Wind Chill Warning	2
Wind Chill Advisory	7
Wind and dust
High Wind Warning	1
Wind Advisory	1
Fog and smoke
Dense Fog Advisory	3

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 2008 2010

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.