Weather alerts in Montana, December 2009

90 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: 90
Warnings: 13
Watches: 8
Advisories: 69
Busiest day: December 4, 200911 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 3, 2:38 PM MST	Winter Weather Advisory	BYZ	Park, Stillwater, Sweet Grass	13 hr
Dec 3, 3:03 PM MST	Winter Storm Watch	TFX		13 hr
Dec 4, 2:56 AM MST	Dense Fog Advisory	GGW	Valley	7 hr
Dec 4, 3:17 AM MST	Winter Storm Watch	GGW	Petroleum, Phillips	12 hr
Dec 4, 3:22 AM MST	Wind Advisory	BYZ	Park, Stillwater, Sweet Grass	14 hr
Dec 4, 3:38 AM MST	Winter Storm Warning	TFX		48 hr
Dec 4, 5:19 AM MST	Winter Weather Advisory	TFX		40 hr
Dec 4, 2:05 PM MST	Wind Chill Warning	MSO	Deer Lodge, Flathead, Granite, Lake, Missoula, Powell and 3 more	69 hr
Dec 4, 2:05 PM MST	Wind Chill Advisory	MSO	Flathead, Granite, Lincoln, Mineral, Missoula, Ravalli and 1 more	69 hr
Dec 4, 2:05 PM MST	Winter Weather Advisory	MSO	Flathead, Granite, Lake, Missoula, Powell	27 hr
Dec 4, 3:01 PM MST	Winter Weather Advisory	GGW	Garfield, Petroleum, Phillips	30 hr
Dec 4, 3:45 PM MST	Winter Storm Warning	BYZ	Golden Valley, Wheatland	36 hr
Dec 4, 3:45 PM MST	Winter Weather Advisory	BYZ	Big Horn, Carbon, Golden Valley, Musselshell, Park, Stillwater and 1 more	36 hr
Dec 5, 2:27 PM MST	Winter Weather Advisory	MSO	Flathead, Lake, Mineral, Missoula, Sanders	17 hr
Dec 6, 4:04 AM MST	Wind Chill Advisory	TFX		23 hr
Dec 6, 6:06 PM MST	Wind Chill Advisory	BYZ	Golden Valley, Park, Wheatland	9 hr
Dec 7, 2:06 PM MST	Wind Chill Warning	MSO	Missoula, Ravalli	8 hr
Dec 8, 2:24 PM MST	Wind Chill Advisory	BYZ	Big Horn, Carbon, Carter, Custer, Fallon, Golden Valley and 8 more	21 hr
Dec 8, 2:43 PM MST	Wind Chill Advisory	TFX		18 hr
Dec 9, 2:39 PM MST	Wind Chill Advisory	TFX		13 hr
Dec 9, 2:53 PM MST	Wind Chill Advisory	BYZ	Big Horn, Carbon, Carter, Custer, Fallon, Golden Valley and 8 more	12 hr
Dec 9, 2:55 PM MST	Wind Chill Advisory	GGW	Daniels, Dawson, Garfield, McCone, Petroleum, Phillips and 6 more	18 hr
Dec 11, 4:27 AM MST	Winter Storm Watch	MSO	Deer Lodge, Flathead, Granite, Lake, Mineral, Missoula and 3 more	24 hr
Dec 11, 4:46 AM MST	Winter Storm Watch	TFX		24 hr
Dec 11, 6:45 AM MST	Wind Advisory	BYZ	Park, Stillwater, Sweet Grass	4 hr
Dec 11, 1:30 PM MST	Winter Storm Warning	MSO	Deer Lodge, Flathead, Granite, Lake, Mineral, Missoula and 4 more	3 days
Dec 11, 2:58 PM MST	Winter Storm Watch	BYZ	Big Horn, Carbon, Carter, Custer, Fallon, Golden Valley and 8 more	24 hr
Dec 11, 3:06 PM MST	Winter Storm Watch	GGW	Daniels, Dawson, Garfield, McCone, Petroleum, Phillips and 6 more	13 hr
Dec 11, 5:28 PM MST	Wind Advisory	BYZ	Park, Stillwater, Sweet Grass	18 hr
Dec 12, 4:06 AM MST	Winter Weather Advisory	MSO	Flathead, Lincoln, Missoula, Ravalli, Sanders	34 hr
Dec 12, 4:19 AM MST	Wind Chill Warning	GGW	Daniels, McCone, Phillips, Richland, Roosevelt, Sheridan and 1 more	24 hr
Dec 12, 4:19 AM MST	Winter Weather Advisory	GGW	Dawson, Garfield, McCone, Petroleum, Phillips, Prairie and 4 more	37 hr
Dec 12, 4:44 AM MST	Winter Storm Warning	TFX		40 hr
Dec 12, 4:44 AM MST	Winter Weather Advisory	TFX		47 hr
Dec 12, 2:57 PM MST	Winter Weather Advisory	BYZ	Big Horn, Carbon, Carter, Custer, Fallon, Golden Valley and 8 more	50 hr
Dec 13, 4:41 AM MST	Winter Storm Warning	BYZ	Carbon, Park, Stillwater, Sweet Grass	32 hr
Dec 14, 2:53 PM MST	Winter Weather Advisory	MSO	Flathead, Granite, Lake, Lincoln, Mineral, Missoula and 2 more	24 hr
Dec 14, 4:25 PM MST	Wind Chill Advisory	GGW	Daniels, Dawson, Garfield, McCone, Phillips, Prairie and 5 more	12 hr
Dec 14, 7:01 PM MST	Wind Chill Warning	TFX		9 hr
Dec 15, 2:29 AM MST	Winter Weather Advisory	BYZ	Park, Stillwater, Sweet Grass	20 hr
Dec 15, 5:09 AM MST	Wind Chill Advisory	GGW	Valley	6 hr
Dec 15, 11:15 AM MST	Wind Chill Advisory	GGW	Daniels, Phillips, Roosevelt, Sheridan, Valley	105 min
Dec 15, 1:05 PM MST	Wind Chill Advisory	GGW	Daniels, Phillips, Roosevelt, Sheridan, Valley	105 min
Dec 15, 4:56 PM MST	Winter Weather Advisory	MSO	Flathead, Granite, Lake, Lincoln, Mineral, Missoula and 3 more	18 hr
Dec 15, 11:06 PM MST	Wind Advisory	BYZ	Park, Stillwater, Sweet Grass	17 hr
Dec 16, 2:00 PM MST	Winter Weather Advisory	MSO	Granite, Mineral, Missoula, Ravalli, Sanders	21 hr
Dec 16, 2:26 PM MST	Freezing Rain Advisory	GGW	McCone, Valley	5 hr
Dec 16, 6:34 PM MST	Freezing Rain Advisory	MSO	Flathead, Granite, Lake, Lincoln, Missoula, Powell and 2 more	16 hr
Dec 16, 9:38 PM MST	Dense Fog Advisory	MSO	Mineral, Missoula, Ravalli, Sanders	13 hr
Dec 17, 2:59 AM MST	Dense Fog Advisory	GGW	McCone, Roosevelt, Valley	7 hr
Dec 17, 2:10 PM MST	Dense Fog Advisory	MSO	Flathead, Lincoln, Mineral, Missoula, Ravalli, Sanders	21 hr
Dec 18, 6:32 PM MST	Dense Fog Advisory	GGW	Daniels, Roosevelt, Sheridan	15 hr
Dec 19, 6:21 AM MST	Dense Fog Advisory	MSO	Mineral, Missoula, Ravalli, Sanders	4 hr
Dec 19, 2:23 PM MST	Winter Weather Advisory	MSO	Flathead, Lake	41 hr
Dec 19, 3:39 PM MST	Winter Weather Advisory	TFX		43 hr
Dec 19, 5:31 PM MST	Wind Advisory	BYZ	Park	3 hr
Dec 20, 5:19 AM MST	Freezing Rain Advisory	MSO	Granite, Lake, Mineral, Missoula, Powell, Ravalli and 1 more	4 hr
Dec 20, 7:39 AM MST	Dense Fog Advisory	BYZ	Custer, Fallon, Rosebud	3 hr
Dec 20, 7:52 AM MST	Dense Fog Advisory	GGW	Dawson, Garfield, McCone, Phillips, Prairie, Roosevelt and 2 more	13 hr
Dec 20, 9:48 AM MST	Freezing Rain Advisory	GGW	Garfield, Petroleum, Phillips	5 hr
Dec 20, 3:51 PM MST	Winter Weather Advisory	GGW	Daniels, Dawson, Garfield, McCone, Petroleum, Phillips and 6 more	22 hr
Dec 20, 4:46 PM MST	Dense Fog Advisory	MSO	Missoula, Ravalli	18 hr
Dec 20, 4:52 PM MST	Dense Fog Advisory	TFX		11 hr
Dec 20, 11:16 PM MST	Winter Weather Advisory	BYZ	Custer, Fallon, Golden Valley, Musselshell, Rosebud, Treasure and 1 more	16 hr
Dec 21, 12:03 AM MST	Ice Storm Warning	TFX		11 hr
Dec 21, 3:03 PM MST	Dense Fog Advisory	TFX		24 hr
Dec 21, 5:10 PM MST	Dense Fog Advisory	BYZ	Big Horn, Golden Valley, Musselshell, Rosebud, Treasure, Wheatland	24 hr
Dec 22, 3:44 AM MST	Winter Storm Watch	GGW	Daniels, Dawson, Garfield, McCone, Petroleum, Phillips and 6 more	23 hr
Dec 22, 4:10 AM MST	Winter Weather Advisory	TFX		34 hr
Dec 22, 4:17 AM MST	Winter Weather Advisory	BYZ	Big Horn, Carbon, Carter, Custer, Fallon, Golden Valley and 8 more	41 hr
Dec 22, 5:08 AM MST	Winter Weather Advisory	MSO	Flathead, Granite, Lake, Missoula, Powell	30 hr
Dec 22, 10:23 AM MST	Dense Fog Advisory	GGW	Garfield, Petroleum, Phillips	4 hr
Dec 22, 3:05 PM MST	Blizzard Watch	GGW	Dawson, McCone, Prairie, Wibaux	12 hr
Dec 23, 3:01 AM MST	Winter Weather Advisory	GGW	Daniels, Dawson, Garfield, McCone, Petroleum, Phillips and 6 more	17 hr
Dec 23, 3:14 PM MST	Wind Chill Advisory	GGW	Daniels, Dawson, Garfield, McCone, Petroleum, Phillips and 6 more	68 hr
Dec 23, 9:06 PM MST	Wind Chill Advisory	BYZ	Carter, Fallon	13 hr
Dec 24, 3:01 PM MST	Wind Chill Advisory	BYZ	Carter, Fallon	13 hr
Dec 24, 3:01 PM MST	Winter Weather Advisory	BYZ	Carter, Custer, Fallon, Powder River	13 hr
Dec 24, 3:22 PM MST	Winter Weather Advisory	GGW	Dawson, Prairie, Richland, Roosevelt, Wibaux	49 hr
Dec 24, 9:37 PM MST	Winter Storm Warning	BYZ	Carter, Custer, Fallon, Powder River	43 hr
Dec 25, 3:20 AM MST	Winter Storm Warning	GGW	Wibaux	37 hr
Dec 25, 3:59 AM MST	Winter Weather Advisory	BYZ	Rosebud	31 hr
Dec 28, 7:29 AM MST	Freezing Fog Advisory	TFX		7 hr
Dec 28, 9:23 AM MST	Dense Fog Advisory	GGW	Daniels, Richland, Roosevelt, Sheridan	4 hr
Dec 29, 5:53 PM MST	Air Stagnation Advisory	TFX		46 hr
Dec 29, 11:00 PM MST	River Flood Warning	TFX	Gallatin	33 hr
Dec 30, 2:21 PM MST	Wind Chill Advisory	GGW	Daniels, Phillips, Sheridan, Valley	20 hr
Dec 30, 2:47 PM MST	Winter Weather Advisory	MSO	Flathead, Granite, Lake, Missoula, Powell	20 hr
Dec 30, 2:47 PM MST	Winter Weather Advisory	MSO	Granite, Missoula, Ravalli	41 hr
Dec 31, 5:00 AM MST	Areal Flood Advisory	TFX	Gallatin	11 hr

By product

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

Product	Alerts
Flooding
River Flood Warning	1
Areal Flood Advisory	1
Winter
Ice Storm Warning	1
Winter Storm Warning	7
Blizzard Watch	1
Winter Storm Watch	7
Freezing Rain Advisory	4
Winter Weather Advisory	27
Cold
Wind Chill Warning	4
Wind Chill Advisory	16
Wind and dust
Wind Advisory	5
Fog and smoke
Air Stagnation Advisory	1
Dense Fog Advisory	14
Freezing Fog Advisory	1

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. Warning verification from the Mesonet's Cow. Rebuilt daily.