Weather alerts in Montana, December 2020

66 weather alerts in December 2020, 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 2020. Tap one for its archive.

Alerts: 66
Warnings: 13
Watches: 9
Advisories: 34
Busiest day: December 22, 20209 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
Nov 30, 7:12 PM MST	Special Weather Statement	BYZ	Sweet Grass, Wheatland	93 min
Dec 5, 12:40 PM MST	High Wind Watch	TFX		26 hr
Dec 6, 2:16 PM MST	High Wind Watch	TFX		31 hr
Dec 6, 2:16 PM MST	High Wind Warning	TFX		51 hr
Dec 7, 1:49 PM MST	Wind Advisory	BYZ	Park, Stillwater, Sweet Grass	31 hr
Dec 7, 10:00 PM MST	High Wind Warning	GGW	Phillips	20 hr
Dec 8, 1:18 PM MST	Winter Weather Advisory	TFX		34 hr
Dec 8, 1:54 PM MST	Winter Weather Advisory	MSO	Flathead, Granite, Lake, Mineral, Missoula, Powell and 2 more	33 hr
Dec 10, 11:40 AM MST	Dense Fog Advisory	GGW	Daniels, Dawson, McCone, Phillips, Prairie, Richland and 4 more	44 hr
Dec 10, 8:19 PM MST	Dense Fog Advisory	TFX		14 hr
Dec 11, 2:37 AM MST	Winter Weather Advisory	TFX		7 hr
Dec 11, 6:17 AM MST	Special Weather Statement	BYZ	Custer	4 hr
Dec 11, 11:22 AM MST	Winter Weather Advisory	MSO	Deer Lodge, Flathead, Granite, Lake, Mineral, Missoula and 4 more	21 hr
Dec 12, 1:30 PM MST	Wind Chill Advisory	GGW	Valley	20 hr
Dec 13, 1:44 PM MST	Winter Weather Advisory	MSO	Deer Lodge, Granite, Mineral, Missoula, Powell, Ravalli and 2 more	21 hr
Dec 13, 2:36 PM MST	Wind Chill Advisory	GGW	Daniels, Phillips, Sheridan, Valley	18 hr
Dec 13, 11:54 PM MST	Winter Weather Advisory	TFX		9 hr
Dec 14, 9:07 AM MST	Special Weather Statement	BYZ	Big Horn, Carbon	3 hr
Dec 14, 12:21 PM MST	High Wind Warning	BYZ	Sweet Grass	42 hr
Dec 14, 12:21 PM MST	Wind Advisory	BYZ	Park, Stillwater, Sweet Grass	44 hr
Dec 15, 3:26 AM MST	Winter Weather Advisory	MSO	Flathead, Granite, Lake, Missoula, Powell	28 hr
Dec 15, 3:32 AM MST	Winter Weather Advisory	TFX		25 hr
Dec 16, 3:41 AM MST	High Wind Watch	TFX		48 hr
Dec 16, 11:32 AM MST	Winter Weather Advisory	MSO	Flathead, Granite, Lake, Mineral, Missoula, Powell and 1 more	23 hr
Dec 16, 11:37 AM MST	Winter Weather Advisory	TFX		23 hr
Dec 17, 2:47 AM MST	High Wind Warning	TFX		4 days
Dec 17, 3:10 AM MST	High Wind Watch	BYZ	Golden Valley, Park, Stillwater, Sweet Grass, Wheatland	24 hr
Dec 17, 6:20 AM MST	Special Weather Statement	BYZ	Park	3 hr
Dec 18, 2:42 AM MST	High Wind Warning	BYZ	Carter, Custer, Fallon, Golden Valley, Park, Powder River and 4 more	65 hr
Dec 18, 2:42 AM MST	Wind Advisory	BYZ	Park, Stillwater, Sweet Grass	24 hr
Dec 18, 3:11 AM MST	High Wind Watch	TFX		23 hr
Dec 18, 12:17 PM MST	High Wind Watch	GGW	Dawson, Garfield, McCone, Petroleum, Phillips, Prairie and 4 more	39 hr
Dec 18, 2:16 PM MST	Wind Advisory	MSO	Deer Lodge, Granite, Powell, Silver Bow	25 hr
Dec 18, 2:16 PM MST	Winter Weather Advisory	MSO	Flathead, Lake, Mineral, Missoula, Sanders	21 hr
Dec 19, 8:41 AM MST	High Wind Warning	GGW	Garfield, Petroleum, Phillips	7 hr
Dec 19, 2:24 PM MST	Winter Weather Advisory	MSO	Flathead, Granite, Lake, Mineral, Missoula, Powell and 2 more	43 hr
Dec 20, 2:49 AM MST	High Wind Warning	GGW	Dawson, Garfield, McCone, Petroleum, Phillips, Prairie and 4 more	15 hr
Dec 21, 2:33 AM MST	Wind Advisory	BYZ	Park, Stillwater, Sweet Grass	31 hr
Dec 21, 11:00 AM MST	High Wind Watch	BYZ	Big Horn, Carter, Custer, Fallon, Musselshell, Powder River and 3 more	15 hr
Dec 21, 12:02 PM MST	High Wind Watch	GGW	Daniels, Dawson, Garfield, McCone, Petroleum, Phillips and 6 more	15 hr
Dec 21, 2:50 PM MST	Winter Weather Advisory	MSO	Deer Lodge, Flathead, Granite, Lake, Lincoln, Mineral and 5 more	32 hr
Dec 21, 3:11 PM MST	High Wind Watch	TFX		13 hr
Dec 21, 3:17 PM MST	Winter Weather Advisory	TFX		35 hr
Dec 21, 7:19 PM MST	Dense Fog Advisory	TFX		9 hr
Dec 21, 7:49 PM MST	Dense Fog Advisory	BYZ	Golden Valley, Musselshell, Rosebud, Treasure, Wheatland, Yellowstone	6 hr
Dec 22, 2:18 AM MST	High Wind Warning	BYZ	Big Horn, Carbon, Carter, Custer, Fallon, Golden Valley and 6 more	24 hr
Dec 22, 3:05 AM MST	High Wind Warning	GGW	Daniels, Dawson, Garfield, McCone, Petroleum, Phillips and 6 more	20 hr
Dec 22, 3:48 AM MST	High Wind Warning	TFX		16 hr
Dec 22, 10:11 AM MST	Snow Squall Warning	MSO	Flathead	34 min
Dec 22, 10:39 AM MST	Snow Squall Warning	MSO	Flathead, Lake	36 min
Dec 22, 3:56 PM MST	Special Weather Statement	TFX	Chouteau, Judith Basin, Lewis and Clark	64 min
Dec 22, 4:06 PM MST	Snow Squall Warning	MSO	Granite, Missoula, Powell	84 min
Dec 22, 5:57 PM MST	Special Weather Statement	TFX	Judith Basin	93 min
Dec 22, 7:47 PM MST	Special Weather Statement	TFX	Fergus, Judith Basin	88 min
Dec 23, 8:54 AM MST	Winter Weather Advisory	TFX		29 hr
Dec 24, 9:19 AM MST	Wind Advisory	BYZ	Park, Stillwater, Sweet Grass	25 hr
Dec 24, 3:35 PM MST	Winter Weather Advisory	TFX		61 hr
Dec 25, 3:37 AM MST	Winter Weather Advisory	MSO	Flathead, Lake, Lincoln, Mineral, Missoula, Sanders	41 hr
Dec 27, 11:10 AM MST	Areal Flood Advisory	TFX	Broadwater, Gallatin	4 days
Dec 28, 2:14 AM MST	Dense Fog Advisory	TFX		10 hr
Dec 28, 4:27 AM MST	Special Weather Statement	BYZ	Musselshell, Yellowstone	108 min
Dec 28, 5:44 AM MST	Dense Fog Advisory	BYZ	Big Horn, Golden Valley, Musselshell, Rosebud, Treasure, Yellowstone	6 hr
Dec 28, 5:38 PM MST	Special Weather Statement	BYZ	Big Horn, Rosebud, Treasure, Yellowstone	3 hr
Dec 28, 8:30 PM MST	Special Weather Statement	BYZ	Big Horn, Rosebud, Treasure, Yellowstone	2 hr
Dec 29, 3:29 AM MST	Winter Weather Advisory	MSO	Flathead, Granite, Lake, Lincoln, Mineral, Missoula and 2 more	61 hr
Dec 29, 1:34 PM MST	Wind Advisory	BYZ	Park, Stillwater, Sweet Grass	40 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
Special Weather Statement	10
Flooding
Areal Flood Advisory	1
Winter
Snow Squall Warning	3
Winter Weather Advisory	18
Cold
Wind Chill Advisory	2
Wind and dust
High Wind Warning	10
High Wind Watch	9
Wind Advisory	7
Fog and smoke
Dense Fog Advisory	6

Nearby

Alerts in force now Tornadoes on record The radar archive 2019 2021

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.