Alert archive / Montana / Severe Thunderstorm Warnings

Severe Thunderstorm Warnings in Montana, 2022

476 severe thunderstorm warnings in 2022. An alert counts here when it covered any part of the state, so the counties below add up to more than the state. The archive of severe thunderstorm warnings reaches back to 1986.

Severe Thunderstorm Warnings by county

Each county as a circle sized by its count in 2022. Tap one for its archive.

Severe Thunderstorm Warnings: 476
Busiest month: July356 severe thunderstorm warnings
Busiest day: July 9, 202252 severe thunderstorm warnings

Over time

By month

Warning verification

How often warnings here had a storm report inside them, and how much warning the reports had.

207 of 476 severe thunderstorm warnings covering Montana in 2022 had a qualifying storm report inside them; 415 of 578 hail, wind and damage reports fell inside a warning, on average 24 minutes after it went out.

Montana, 2022

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
Severe thunderstorm warnings	476	207	57%	578	72%	24 min

Each office's whole area, 2022

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
NWS Missoula, MT: severe thunderstorm warnings	76	39	49%	90	74%	16 min
NWS Great Falls, MT: severe thunderstorm warnings	170	65	62%	216	70%	23 min
NWS Glasgow, MT: severe thunderstorm warnings	134	63	53%	150	73%	27 min
NWS Billings, MT: severe thunderstorm warnings	119	52	56%	157	65%	29 min

An office's figures cover every county it serves, including across state lines.

Verified by the Iowa Environmental Mesonet's Cow, which matches each storm-based warning with the local storm reports inside its polygon while it was in force, within 15 km of its edge: a tornado warning counts as verified on a tornado report, a severe thunderstorm warning on hail of 1 inch or more, a gust of 58 mph or more, or wind damage, a flash flood warning on a flash flood report. The false alarm ratio is the share of warnings with no such report; "inside a warning" is the probability of detection, the share of reports that fell inside one; lead time runs from the warning's issue to each report inside it, counting zero for a report that came first. A warning with no report is not proof nothing happened: reports come from spotters, the public and damage surveys, and are thin where few people live.

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
Feb 19, 8:52 PM MST	Severe Thunderstorm Warning	GGW	McCone, Valley	23 min
Feb 19, 9:28 PM MST	Severe Thunderstorm Warning	GGW	Dawson, McCone, Richland, Roosevelt, Sheridan	62 min
Feb 19, 10:56 PM MST	Severe Thunderstorm Warning	GGW	Garfield, McCone, Roosevelt, Valley	64 min
May 5, 8:25 PM MDT	Severe Thunderstorm Warning	TFX	Cascade	35 min
May 5, 8:49 PM MDT	Severe Thunderstorm Warning	TFX	Cascade, Chouteau, Judith Basin	26 min
May 16, 3:18 PM MDT	Severe Thunderstorm Warning	TFX	Broadwater, Meagher	42 min
May 16, 5:16 PM MDT	Severe Thunderstorm Warning	TFX	Gallatin, Madison	29 min
May 28, 4:28 PM MDT	Severe Thunderstorm Warning	BYZ	Carter	47 min
May 28, 5:13 PM MDT	Severe Thunderstorm Warning	BYZ	Carter	47 min
Jun 11, 4:23 PM MDT	Severe Thunderstorm Warning	BYZ	Big Horn	37 min
Jun 11, 5:00 PM MDT	Severe Thunderstorm Warning Destructive damage threat	BYZ	Big Horn, Rosebud	60 min
Jun 11, 5:22 PM MDT	Severe Thunderstorm Warning Considerable damage threat	BYZ	Custer, Powder River, Rosebud	53 min
Jun 11, 5:45 PM MDT	Severe Thunderstorm Warning	BYZ	Powder River	60 min
Jun 11, 6:12 PM MDT	Severe Thunderstorm Warning	BYZ	Powder River	48 min
Jun 11, 6:44 PM MDT	Severe Thunderstorm Warning Considerable damage threat	BYZ	Carter, Powder River	54 min
Jun 11, 7:07 PM MDT	Severe Thunderstorm Warning	BYZ	Carter	68 min
Jun 12, 2:34 PM MDT	Severe Thunderstorm Warning	BYZ	Big Horn, Powder River	41 min
Jun 12, 3:13 PM MDT	Severe Thunderstorm Warning	BYZ	Carter, Powder River	45 min
Jun 13, 4:14 PM MDT	Severe Thunderstorm Warning	GGW	Wibaux	27 min
Jun 17, 5:10 PM MDT	Severe Thunderstorm Warning Considerable damage threat	BYZ	Big Horn, Powder River	35 min
Jun 17, 6:34 PM MDT	Severe Thunderstorm Warning	TFX	Glacier, Pondera	45 min
Jun 17, 7:02 PM MDT	Severe Thunderstorm Warning	TFX	Glacier, Pondera, Toole	43 min
Jun 18, 1:14 AM MDT	Severe Thunderstorm Warning	TFX	Glacier	31 min
Jun 18, 1:13 PM MDT	Severe Thunderstorm Warning	MSO	Missoula, Ravalli	32 min
Jun 18, 1:15 PM MDT	Severe Thunderstorm Warning	MSO	Lake, Missoula	45 min
Jun 18, 1:20 PM MDT	Severe Thunderstorm Warning	MSO	Powell	25 min
Jun 18, 1:27 PM MDT	Severe Thunderstorm Warning	TFX	Lewis and Clark	48 min
Jun 18, 1:28 PM MDT	Severe Thunderstorm Warning	TFX	Lewis and Clark	47 min
Jun 18, 1:34 PM MDT	Severe Thunderstorm Warning	MSO	Missoula	41 min
Jun 18, 1:39 PM MDT	Severe Thunderstorm Warning	TFX	Lewis and Clark	36 min
Jun 18, 1:54 PM MDT	Severe Thunderstorm Warning	TFX	Lewis and Clark, Teton	8 min
Jun 18, 2:03 PM MDT	Severe Thunderstorm Warning Considerable damage threat	TFX	Cascade, Lewis and Clark, Teton	42 min
Jun 18, 2:24 PM MDT	Severe Thunderstorm Warning	TFX	Glacier	36 min
Jun 18, 2:31 PM MDT	Severe Thunderstorm Warning Considerable damage threat	TFX	Cascade, Lewis and Clark, Teton	44 min
Jun 18, 2:36 PM MDT	Severe Thunderstorm Warning	TFX	Pondera, Teton	39 min
Jun 18, 2:59 PM MDT	Severe Thunderstorm Warning Considerable damage threat	TFX	Cascade, Chouteau, Teton	46 min
Jun 18, 3:28 PM MDT	Severe Thunderstorm Warning Considerable damage threat	TFX	Cascade, Chouteau, Pondera, Teton	47 min
Jun 18, 3:56 PM MDT	Severe Thunderstorm Warning Considerable damage threat	TFX	Chouteau, Hill, Liberty	49 min
Jun 18, 5:38 PM MDT	Severe Thunderstorm Warning	TFX	Blaine, Hill	37 min
Jun 18, 6:13 PM MDT	Severe Thunderstorm Warning Considerable damage threat	TFX	Blaine, Hill	17 min
Jun 18, 7:32 PM MDT	Severe Thunderstorm Warning Considerable damage threat	TFX	Blaine, Fergus	28 min
Jun 18, 7:47 PM MDT	Severe Thunderstorm Warning	GGW	Phillips	58 min
Jun 18, 7:58 PM MDT	Severe Thunderstorm Warning	TFX	Blaine	32 min
Jun 18, 10:41 PM MDT	Severe Thunderstorm Warning	GGW	Phillips, Valley	48 min
Jun 18, 11:36 PM MDT	Severe Thunderstorm Warning Considerable damage threat	GGW	Phillips, Valley	54 min
Jun 19, 12:07 AM MDT	Severe Thunderstorm Warning Considerable damage threat	GGW	Phillips, Valley	53 min
Jun 19, 1:37 AM MDT	Severe Thunderstorm Warning Considerable damage threat	GGW	Daniels, Valley	38 min
Jun 19, 4:11 AM MDT	Severe Thunderstorm Warning Considerable damage threat	GGW	Garfield, Petroleum, Phillips	64 min
Jun 19, 4:57 AM MDT	Severe Thunderstorm Warning Considerable damage threat	GGW	Garfield, Phillips, Valley	63 min
Jun 19, 5:28 PM MDT	Severe Thunderstorm Warning Considerable damage threat	BYZ	Carter	47 min
Jun 19, 6:13 PM MDT	Severe Thunderstorm Warning	BYZ	Carter	47 min
Jun 20, 1:34 PM MDT	Severe Thunderstorm Warning	BYZ	Big Horn, Powder River, Rosebud	56 min
Jun 20, 1:53 PM MDT	Severe Thunderstorm Warning	BYZ	Big Horn, Rosebud	52 min
Jun 23, 3:48 PM MDT	Severe Thunderstorm Warning	GGW	Daniels, Roosevelt, Valley	57 min
Jun 23, 3:56 PM MDT	Severe Thunderstorm Warning	GGW	Daniels, Roosevelt, Valley	64 min
Jun 23, 5:12 PM MDT	Severe Thunderstorm Warning	GGW	Phillips, Valley	51 min
Jun 28, 1:58 PM MDT	Severe Thunderstorm Warning	TFX	Beaverhead, Madison	32 min
Jun 28, 3:18 PM MDT	Severe Thunderstorm Warning	TFX	Broadwater	27 min
Jun 28, 4:54 PM MDT	Severe Thunderstorm Warning	TFX	Gallatin, Madison	38 min
Jun 28, 5:22 PM MDT	Severe Thunderstorm Warning	TFX	Fergus	53 min
Jun 28, 7:13 PM MDT	Severe Thunderstorm Warning	GGW	Garfield, Petroleum	62 min
Jun 28, 7:36 PM MDT	Severe Thunderstorm Warning	GGW	Garfield, Petroleum, Phillips, Valley	54 min
Jun 28, 8:01 PM MDT	Severe Thunderstorm Warning	GGW	Phillips	59 min
Jun 28, 10:20 PM MDT	Severe Thunderstorm Warning	TFX	Hill, Liberty, Toole	55 min
Jun 28, 11:13 PM MDT	Severe Thunderstorm Warning	TFX	Blaine, Hill, Liberty	77 min
Jun 29, 3:53 PM MDT	Severe Thunderstorm Warning	BYZ	Carter, Powder River	67 min
Jul 1, 5:54 PM MDT	Severe Thunderstorm Warning	BYZ	Custer	36 min
Jul 1, 6:27 PM MDT	Severe Thunderstorm Warning	BYZ	Carter, Custer	63 min
Jul 1, 7:23 PM MDT	Severe Thunderstorm Warning	BYZ	Carter, Custer, Powder River	67 min
Jul 1, 7:28 PM MDT	Severe Thunderstorm Warning	GGW	Daniels, Sheridan	62 min
Jul 1, 8:19 PM MDT	Severe Thunderstorm Warning	GGW	Roosevelt, Sheridan	43 min
Jul 1, 9:13 PM MDT	Severe Thunderstorm Warning	BYZ	Big Horn, Stillwater, Yellowstone	45 min
Jul 2, 2:44 PM MDT	Severe Thunderstorm Warning	GGW	Garfield, McCone	61 min
Jul 2, 2:45 PM MDT	Severe Thunderstorm Warning	GGW	Sheridan	60 min
Jul 2, 3:34 PM MDT	Severe Thunderstorm Warning	GGW	Dawson, McCone, Prairie	56 min
Jul 2, 3:40 PM MDT	Severe Thunderstorm Warning	GGW	Roosevelt, Sheridan	51 min
Jul 2, 3:48 PM MDT	Severe Thunderstorm Warning	GGW	Daniels, Roosevelt, Valley	57 min
Jul 2, 4:26 PM MDT	Severe Thunderstorm Warning	GGW	Dawson, Prairie	52 min
Jul 2, 5:12 PM MDT	Severe Thunderstorm Warning	GGW	Richland	63 min
Jul 2, 6:16 PM MDT	Severe Thunderstorm Warning	GGW	Wibaux	29 min
Jul 2, 6:28 PM MDT	Severe Thunderstorm Warning	TFX	Glacier	32 min
Jul 2, 6:59 PM MDT	Severe Thunderstorm Warning	TFX	Glacier	46 min
Jul 2, 7:44 PM MDT	Severe Thunderstorm Warning Considerable damage threat	TFX	Glacier	46 min
Jul 2, 8:25 PM MDT	Severe Thunderstorm Warning	TFX	Cascade, Chouteau, Judith Basin, Pondera, Teton	35 min
Jul 2, 8:29 PM MDT	Severe Thunderstorm Warning	TFX	Glacier, Toole	46 min
Jul 2, 9:14 PM MDT	Severe Thunderstorm Warning	TFX	Toole	44 min
Jul 3, 12:20 PM MDT	Severe Thunderstorm Warning	TFX	Beaverhead	40 min
Jul 3, 12:55 PM MDT	Severe Thunderstorm Warning Considerable damage threat	TFX	Beaverhead	65 min
Jul 3, 1:53 PM MDT	Severe Thunderstorm Warning	TFX	Beaverhead, Gallatin, Madison	52 min
Jul 3, 2:39 PM MDT	Severe Thunderstorm Warning	MSO	Ravalli	36 min
Jul 3, 3:14 PM MDT	Severe Thunderstorm Warning	MSO	Granite, Ravalli	31 min
Jul 3, 3:32 PM MDT	Severe Thunderstorm Warning	GGW	Garfield, Petroleum, Phillips, Valley	58 min
Jul 3, 4:15 PM MDT	Severe Thunderstorm Warning	BYZ	Stillwater, Sweet Grass	60 min
Jul 3, 4:25 PM MDT	Severe Thunderstorm Warning Destructive damage threat	GGW	Garfield, Phillips, Valley	65 min
Jul 3, 5:00 PM MDT	Severe Thunderstorm Warning Considerable damage threat	BYZ	Golden Valley, Musselshell, Stillwater, Yellowstone	60 min
Jul 3, 5:11 PM MDT	Severe Thunderstorm Warning	MSO	Flathead, Lake, Sanders	16 min
Jul 3, 5:14 PM MDT	Severe Thunderstorm Warning Considerable damage threat	GGW	Garfield, McCone, Prairie, Valley	61 min
Jul 3, 5:25 PM MDT	Severe Thunderstorm Warning Considerable damage threat	GGW	Garfield, Valley	50 min
Jul 3, 5:37 PM MDT	Severe Thunderstorm Warning Considerable damage threat	BYZ	Yellowstone	53 min
Jul 3, 5:59 PM MDT	Severe Thunderstorm Warning	BYZ	Yellowstone	31 min
Jul 3, 6:09 PM MDT	Severe Thunderstorm Warning	GGW	Dawson, Garfield, McCone, Prairie, Valley	66 min
Jul 3, 6:19 PM MDT	Severe Thunderstorm Warning	BYZ	Big Horn, Powder River, Rosebud	56 min
Jul 3, 6:30 PM MDT	Severe Thunderstorm Warning Considerable damage threat	BYZ	Big Horn, Yellowstone	60 min
Jul 3, 6:47 PM MDT	Severe Thunderstorm Warning Considerable damage threat	TFX	Jefferson, Lewis and Clark	28 min
Jul 3, 7:00 PM MDT	Severe Thunderstorm Warning Considerable damage threat	BYZ	Big Horn	30 min
Jul 3, 7:01 PM MDT	Severe Thunderstorm Warning	GGW	Dawson, McCone, Prairie, Richland, Wibaux	59 min
Jul 3, 7:09 PM MDT	Severe Thunderstorm Warning	BYZ	Powder River, Rosebud	66 min
Jul 3, 7:21 PM MDT	Severe Thunderstorm Warning Considerable damage threat	BYZ	Big Horn, Rosebud, Treasure	39 min
Jul 3, 7:26 PM MDT	Severe Thunderstorm Warning	BYZ	Big Horn, Rosebud	23 min
Jul 3, 7:53 PM MDT	Severe Thunderstorm Warning	BYZ	Custer, Powder River	67 min
Jul 3, 7:54 PM MDT	Severe Thunderstorm Warning Considerable damage threat	GGW	Dawson, Prairie, Wibaux	66 min
Jul 3, 7:59 PM MDT	Severe Thunderstorm Warning Considerable damage threat	BYZ	Custer, Fallon	61 min
Jul 3, 7:59 PM MDT	Severe Thunderstorm Warning	BYZ	Big Horn, Custer, Rosebud	46 min
Jul 3, 8:40 PM MDT	Severe Thunderstorm Warning Considerable damage threat	BYZ	Carter, Custer, Powder River, Rosebud	65 min
Jul 3, 8:47 PM MDT	Severe Thunderstorm Warning Considerable damage threat	BYZ	Fallon	58 min
Jul 3, 8:53 PM MDT	Severe Thunderstorm Warning Considerable damage threat	GGW	Dawson, Richland, Wibaux	37 min
Jul 3, 9:14 PM MDT	Severe Thunderstorm Warning Considerable damage threat	BYZ	Fallon	61 min
Jul 3, 9:41 PM MDT	Severe Thunderstorm Warning	BYZ	Carter, Custer, Fallon	34 min
Jul 4, 3:48 PM MDT	Severe Thunderstorm Warning	TFX	Lewis and Clark	17 min
Jul 4, 4:06 PM MDT	Severe Thunderstorm Warning	MSO	Granite, Missoula, Powell	24 min
Jul 4, 4:29 PM MDT	Severe Thunderstorm Warning	MSO	Granite, Missoula, Powell	31 min
Jul 4, 5:09 PM MDT	Severe Thunderstorm Warning	TFX	Cascade	36 min
Jul 4, 5:49 PM MDT	Severe Thunderstorm Warning Considerable damage threat	GGW	Daniels, Roosevelt, Sheridan	56 min
Jul 4, 6:24 PM MDT	Severe Thunderstorm Warning	TFX	Fergus, Judith Basin	36 min
Jul 4, 6:40 PM MDT	Severe Thunderstorm Warning	TFX	Fergus	35 min
Jul 4, 6:52 PM MDT	Severe Thunderstorm Warning	BYZ	Wheatland	23 min
Jul 4, 7:13 PM MDT	Severe Thunderstorm Warning	BYZ	Golden Valley, Wheatland	47 min
Jul 4, 7:39 PM MDT	Severe Thunderstorm Warning	TFX	Fergus	66 min
Jul 4, 7:43 PM MDT	Severe Thunderstorm Warning	BYZ	Golden Valley, Musselshell	47 min
Jul 4, 8:18 PM MDT	Severe Thunderstorm Warning	GGW	Garfield, Petroleum	57 min
Jul 4, 9:29 PM MDT	Severe Thunderstorm Warning	BYZ	Rosebud	61 min
Jul 4, 9:47 PM MDT	Severe Thunderstorm Warning	GGW	Garfield	58 min
Jul 4, 10:41 PM MDT	Severe Thunderstorm Warning	GGW	Garfield, McCone, Prairie	64 min
Jul 5, 12:00 AM MDT	Severe Thunderstorm Warning	BYZ	Sweet Grass	45 min
Jul 5, 12:39 AM MDT	Severe Thunderstorm Warning Considerable damage threat	BYZ	Golden Valley, Stillwater, Sweet Grass	66 min
Jul 5, 12:46 AM MDT	Severe Thunderstorm Warning Considerable damage threat	BYZ	Custer, Rosebud	44 min
Jul 5, 1:05 AM MDT	Severe Thunderstorm Warning	GGW	Garfield, Petroleum	55 min
Jul 5, 1:30 AM MDT	Severe Thunderstorm Warning	BYZ	Custer	45 min
Jul 5, 1:39 AM MDT	Severe Thunderstorm Warning Considerable damage threat	BYZ	Stillwater, Yellowstone	66 min
Jul 5, 2:08 AM MDT	Severe Thunderstorm Warning	BYZ	Custer, Powder River	52 min
Jul 5, 2:41 AM MDT	Severe Thunderstorm Warning	BYZ	Big Horn, Yellowstone	64 min
Jul 5, 2:43 AM MDT	Severe Thunderstorm Warning Considerable damage threat	BYZ	Custer, Fallon	47 min
Jul 5, 2:47 AM MDT	Severe Thunderstorm Warning Considerable damage threat	BYZ	Fallon	58 min
Jul 5, 2:55 AM MDT	Severe Thunderstorm Warning Considerable damage threat	BYZ	Custer, Powder River	65 min
Jul 5, 3:38 AM MDT	Severe Thunderstorm Warning	BYZ	Big Horn, Treasure, Yellowstone	37 min
Jul 5, 3:43 AM MDT	Severe Thunderstorm Warning Considerable damage threat	BYZ	Fallon	47 min
Jul 5, 3:58 AM MDT	Severe Thunderstorm Warning Considerable damage threat	BYZ	Carter, Custer, Fallon	77 min
Jul 5, 4:14 AM MDT	Severe Thunderstorm Warning	BYZ	Big Horn, Rosebud, Treasure	61 min
Jul 5, 5:07 AM MDT	Severe Thunderstorm Warning Considerable damage threat	BYZ	Custer, Powder River, Rosebud	53 min
Jul 5, 5:15 AM MDT	Severe Thunderstorm Warning Considerable damage threat	BYZ	Carter, Fallon	30 min
Jul 5, 6:04 AM MDT	Severe Thunderstorm Warning	BYZ	Carter, Custer, Fallon	56 min
Jul 5, 6:27 AM MDT	Severe Thunderstorm Warning	BYZ	Carter, Powder River	28 min
Jul 5, 6:52 AM MDT	Severe Thunderstorm Warning	BYZ	Carter, Fallon, Powder River	53 min
Jul 5, 7:35 AM MDT	Severe Thunderstorm Warning	BYZ	Carter, Fallon	40 min
Jul 5, 2:52 PM MDT	Severe Thunderstorm Warning	TFX	Fergus	53 min
Jul 5, 3:29 PM MDT	Severe Thunderstorm Warning	GGW	Garfield, Petroleum, Phillips	61 min
Jul 5, 3:34 PM MDT	Severe Thunderstorm Warning	TFX	Fergus	56 min
Jul 5, 4:18 PM MDT	Severe Thunderstorm Warning	GGW	Phillips, Valley	57 min
Jul 5, 4:23 PM MDT	Severe Thunderstorm Warning Considerable damage threat	GGW	Garfield, Petroleum, Phillips	67 min
Jul 5, 5:24 PM MDT	Severe Thunderstorm Warning	GGW	Garfield	66 min
Jul 5, 5:44 PM MDT	Severe Thunderstorm Warning	GGW	Daniels, Roosevelt, Valley	61 min
Jul 5, 6:41 PM MDT	Severe Thunderstorm Warning	BYZ	Rosebud	64 min
Jul 5, 6:41 PM MDT	Severe Thunderstorm Warning	GGW	Daniels, Roosevelt, Sheridan, Valley	64 min
Jul 5, 6:45 PM MDT	Severe Thunderstorm Warning	GGW	Garfield	60 min
Jul 5, 7:40 PM MDT	Severe Thunderstorm Warning	GGW	Daniels, Roosevelt, Sheridan	80 min
Jul 5, 7:59 PM MDT	Severe Thunderstorm Warning	GGW	Dawson, McCone, Prairie	61 min
Jul 5, 8:58 PM MDT	Severe Thunderstorm Warning	GGW	Dawson	62 min
Jul 6, 1:14 PM MDT	Severe Thunderstorm Warning	TFX	Fergus, Judith Basin	46 min
Jul 6, 2:55 PM MDT	Severe Thunderstorm Warning	GGW	Roosevelt, Sheridan	65 min
Jul 6, 3:09 PM MDT	Severe Thunderstorm Warning	TFX	Blaine	51 min
Jul 6, 3:16 PM MDT	Severe Thunderstorm Warning	GGW	Daniels, Roosevelt, Sheridan	33 min
Jul 6, 3:19 PM MDT	Severe Thunderstorm Warning	GGW	Richland, Roosevelt	56 min
Jul 6, 3:32 PM MDT	Severe Thunderstorm Warning	GGW	Roosevelt, Valley	58 min
Jul 6, 3:38 PM MDT	Severe Thunderstorm Warning	TFX	Fergus, Judith Basin	38 min
Jul 6, 3:54 PM MDT	Severe Thunderstorm Warning	TFX	Blaine	13 min
Jul 6, 3:58 PM MDT	Severe Thunderstorm Warning	TFX	Blaine	47 min
Jul 6, 4:06 PM MDT	Severe Thunderstorm Warning Considerable damage threat	GGW	Richland, Roosevelt	25 min
Jul 6, 4:11 PM MDT	Severe Thunderstorm Warning	BYZ	Big Horn, Carbon	51 min
Jul 6, 4:18 PM MDT	Severe Thunderstorm Warning	GGW	McCone, Roosevelt, Valley	57 min
Jul 6, 4:21 PM MDT	Severe Thunderstorm Warning	TFX	Chouteau, Hill	22 min
Jul 6, 4:27 PM MDT	Severe Thunderstorm Warning	TFX	Chouteau, Hill	48 min
Jul 6, 4:51 PM MDT	Severe Thunderstorm Warning	BYZ	Big Horn, Treasure	36 min
Jul 6, 4:54 PM MDT	Severe Thunderstorm Warning	TFX	Fergus, Judith Basin	36 min
Jul 6, 4:58 PM MDT	Severe Thunderstorm Warning	GGW	Phillips, Valley	62 min
Jul 6, 5:03 PM MDT	Severe Thunderstorm Warning	TFX	Blaine	57 min
Jul 6, 5:06 PM MDT	Severe Thunderstorm Warning Considerable damage threat	GGW	Dawson, McCone, Richland	54 min
Jul 6, 5:10 PM MDT	Severe Thunderstorm Warning Considerable damage threat	TFX	Blaine	35 min
Jul 6, 5:11 PM MDT	Severe Thunderstorm Warning	GGW	Phillips	64 min
Jul 6, 5:13 PM MDT	Severe Thunderstorm Warning	TFX	Hill	47 min
Jul 6, 5:18 PM MDT	Severe Thunderstorm Warning	GGW	Garfield	57 min
Jul 6, 5:25 PM MDT	Severe Thunderstorm Warning	TFX	Blaine	32 min
Jul 6, 5:43 PM MDT	Severe Thunderstorm Warning	BYZ	Golden Valley, Musselshell	62 min
Jul 6, 5:44 PM MDT	Severe Thunderstorm Warning	TFX	Hill	31 min
Jul 6, 5:46 PM MDT	Severe Thunderstorm Warning	BYZ	Golden Valley, Wheatland	42 min
Jul 6, 5:48 PM MDT	Severe Thunderstorm Warning	TFX	Fergus	42 min
Jul 6, 5:50 PM MDT	Severe Thunderstorm Warning	GGW	Valley	55 min
Jul 6, 5:51 PM MDT	Severe Thunderstorm Warning	BYZ	Rosebud	22 min
Jul 6, 5:54 PM MDT	Severe Thunderstorm Warning	GGW	Dawson, McCone, Richland	50 min
Jul 6, 6:03 PM MDT	Severe Thunderstorm Warning	GGW	Garfield	57 min
Jul 6, 6:09 PM MDT	Severe Thunderstorm Warning	GGW	Petroleum, Phillips	66 min
Jul 6, 6:14 PM MDT	Severe Thunderstorm Warning	GGW	Garfield, Phillips, Valley	61 min
Jul 6, 6:17 PM MDT	Severe Thunderstorm Warning	GGW	Valley	58 min
Jul 6, 6:21 PM MDT	Severe Thunderstorm Warning	TFX	Liberty, Pondera, Toole	54 min
Jul 6, 6:33 PM MDT	Severe Thunderstorm Warning	BYZ	Musselshell, Yellowstone	42 min
Jul 6, 6:33 PM MDT	Severe Thunderstorm Warning	TFX	Fergus, Judith Basin	42 min
Jul 6, 6:38 PM MDT	Severe Thunderstorm Warning	GGW	Garfield, McCone, Valley	67 min
Jul 6, 6:41 PM MDT	Severe Thunderstorm Warning Considerable damage threat	GGW	Garfield	64 min
Jul 6, 6:48 PM MDT	Severe Thunderstorm Warning	TFX	Broadwater, Lewis and Clark, Meagher	57 min
Jul 6, 6:56 PM MDT	Severe Thunderstorm Warning	TFX	Hill, Liberty	64 min
Jul 6, 7:04 PM MDT	Severe Thunderstorm Warning	GGW	Dawson	56 min
Jul 6, 7:09 PM MDT	Severe Thunderstorm Warning	GGW	Garfield, Phillips, Valley	66 min
Jul 6, 7:12 PM MDT	Severe Thunderstorm Warning	GGW	Phillips, Valley	28 min
Jul 6, 7:13 PM MDT	Severe Thunderstorm Warning	TFX	Chouteau, Hill, Liberty	62 min
Jul 6, 7:15 PM MDT	Severe Thunderstorm Warning	GGW	Garfield, McCone, Valley	42 min
Jul 6, 7:24 PM MDT	Severe Thunderstorm Warning	BYZ	Rosebud	51 min
Jul 6, 7:28 PM MDT	Severe Thunderstorm Warning	BYZ	Musselshell	62 min
Jul 6, 7:51 PM MDT	Severe Thunderstorm Warning	GGW	Dawson	54 min
Jul 6, 8:25 PM MDT	Severe Thunderstorm Warning	GGW	Garfield, McCone	42 min
Jul 6, 8:29 PM MDT	Severe Thunderstorm Warning	GGW	Dawson, Prairie	61 min
Jul 6, 9:34 PM MDT	Severe Thunderstorm Warning	GGW	Dawson, McCone, Prairie	23 min
Jul 7, 1:27 PM MDT	Severe Thunderstorm Warning	TFX	Glacier	63 min
Jul 7, 2:38 PM MDT	Severe Thunderstorm Warning	TFX	Teton	52 min
Jul 7, 3:21 PM MDT	Severe Thunderstorm Warning Destructive damage threat	TFX	Pondera, Teton	24 min
Jul 7, 3:46 PM MDT	Severe Thunderstorm Warning	TFX	Toole	59 min
Jul 7, 3:56 PM MDT	Severe Thunderstorm Warning	TFX	Pondera, Teton	46 min
Jul 7, 4:09 PM MDT	Severe Thunderstorm Warning	TFX	Cascade, Teton	51 min
Jul 7, 4:39 PM MDT	Severe Thunderstorm Warning	TFX	Toole	51 min
Jul 7, 4:51 PM MDT	Severe Thunderstorm Warning	TFX	Cascade, Chouteau, Pondera, Teton	54 min
Jul 7, 5:05 PM MDT	Severe Thunderstorm Warning	BYZ	Golden Valley, Stillwater, Sweet Grass, Wheatland	55 min
Jul 7, 5:35 PM MDT	Severe Thunderstorm Warning	TFX	Cascade, Chouteau, Teton	55 min
Jul 7, 5:55 PM MDT	Severe Thunderstorm Warning	MSO	Powell	20 min
Jul 7, 5:58 PM MDT	Severe Thunderstorm Warning	BYZ	Golden Valley, Musselshell	47 min
Jul 7, 6:22 PM MDT	Severe Thunderstorm Warning Considerable damage threat	TFX	Chouteau, Fergus	53 min
Jul 7, 6:25 PM MDT	Severe Thunderstorm Warning	TFX	Lewis and Clark	65 min
Jul 7, 6:30 PM MDT	Severe Thunderstorm Warning Considerable damage threat	TFX	Blaine, Hill	32 min
Jul 7, 6:57 PM MDT	Severe Thunderstorm Warning	MSO	Granite, Ravalli	33 min
Jul 7, 7:01 PM MDT	Severe Thunderstorm Warning	MSO	Granite, Powell	29 min
Jul 7, 7:08 PM MDT	Severe Thunderstorm Warning	TFX	Chouteau, Fergus	31 min
Jul 7, 7:16 PM MDT	Severe Thunderstorm Warning Considerable damage threat	MSO	Granite, Missoula, Ravalli	44 min
Jul 7, 7:41 PM MDT	Severe Thunderstorm Warning Considerable damage threat	MSO	Flathead, Lake, Sanders	34 min
Jul 7, 7:48 PM MDT	Severe Thunderstorm Warning	TFX	Fergus	25 min
Jul 7, 7:55 PM MDT	Severe Thunderstorm Warning	MSO	Flathead, Lake	50 min
Jul 7, 7:56 PM MDT	Severe Thunderstorm Warning Considerable damage threat	MSO	Flathead, Lake, Sanders	49 min
Jul 7, 8:07 PM MDT	Severe Thunderstorm Warning Considerable damage threat	MSO	Lake	53 min
Jul 7, 8:13 PM MDT	Severe Thunderstorm Warning	TFX	Chouteau, Fergus	45 min
Jul 7, 8:17 PM MDT	Severe Thunderstorm Warning	TFX	Cascade	28 min
Jul 7, 8:24 PM MDT	Severe Thunderstorm Warning	TFX	Fergus, Judith Basin	51 min
Jul 7, 8:33 PM MDT	Severe Thunderstorm Warning	MSO	Missoula	32 min
Jul 7, 8:40 PM MDT	Severe Thunderstorm Warning	TFX	Cascade, Teton	23 min
Jul 7, 8:49 PM MDT	Severe Thunderstorm Warning	TFX	Cascade, Chouteau, Judith Basin	25 min
Jul 7, 8:51 PM MDT	Severe Thunderstorm Warning	MSO	Flathead, Lake	24 min
Jul 7, 9:02 PM MDT	Severe Thunderstorm Warning Considerable damage threat	MSO	Lake	28 min
Jul 7, 9:09 PM MDT	Severe Thunderstorm Warning	TFX	Cascade, Chouteau, Fergus, Judith Basin	51 min
Jul 7, 9:12 PM MDT	Severe Thunderstorm Warning	MSO	Flathead	33 min
Jul 7, 9:25 PM MDT	Severe Thunderstorm Warning Considerable damage threat	MSO	Flathead, Lake	50 min
Jul 7, 9:35 PM MDT	Severe Thunderstorm Warning Considerable damage threat	MSO	Flathead	25 min
Jul 8, 12:49 AM MDT	Severe Thunderstorm Warning	GGW	Garfield, Valley	41 min
Jul 8, 1:49 AM MDT	Severe Thunderstorm Warning	MSO	Lake	26 min
Jul 8, 2:48 PM MDT	Severe Thunderstorm Warning	TFX	Beaverhead, Madison	19 min
Jul 8, 2:49 PM MDT	Severe Thunderstorm Warning	MSO	Ravalli	26 min
Jul 8, 3:18 PM MDT	Severe Thunderstorm Warning	MSO	Mineral, Missoula	27 min
Jul 8, 3:33 PM MDT	Severe Thunderstorm Warning Considerable damage threat	MSO	Missoula	42 min
Jul 8, 3:55 PM MDT	Severe Thunderstorm Warning	MSO	Lake, Sanders	24 min
Jul 8, 4:08 PM MDT	Severe Thunderstorm Warning	TFX	Toole	22 min
Jul 8, 4:12 PM MDT	Severe Thunderstorm Warning	MSO	Lake	26 min
Jul 8, 4:16 PM MDT	Severe Thunderstorm Warning	MSO	Missoula	33 min
Jul 8, 4:37 PM MDT	Severe Thunderstorm Warning	MSO	Lake	23 min
Jul 8, 4:54 PM MDT	Severe Thunderstorm Warning	TFX	Pondera, Toole	51 min
Jul 8, 5:01 PM MDT	Severe Thunderstorm Warning	TFX	Broadwater, Jefferson, Lewis and Clark	14 min
Jul 8, 5:16 PM MDT	Severe Thunderstorm Warning	TFX	Lewis and Clark	43 min
Jul 8, 5:22 PM MDT	Severe Thunderstorm Warning Considerable damage threat	TFX	Liberty, Toole	38 min
Jul 8, 5:29 PM MDT	Severe Thunderstorm Warning Considerable damage threat	TFX	Liberty, Pondera, Toole	46 min
Jul 8, 5:41 PM MDT	Severe Thunderstorm Warning Considerable damage threat	TFX	Liberty, Toole	34 min
Jul 8, 5:56 PM MDT	Severe Thunderstorm Warning	TFX	Lewis and Clark	34 min
Jul 8, 6:13 PM MDT	Severe Thunderstorm Warning	TFX	Chouteau, Hill, Liberty	47 min
Jul 8, 6:13 PM MDT	Severe Thunderstorm Warning	TFX	Cascade	47 min
Jul 8, 6:14 PM MDT	Severe Thunderstorm Warning Considerable damage threat	TFX	Hill, Liberty	46 min
Jul 8, 6:49 PM MDT	Severe Thunderstorm Warning	TFX	Chouteau	26 min
Jul 8, 6:56 PM MDT	Severe Thunderstorm Warning	TFX	Chouteau, Hill	49 min
Jul 8, 7:00 PM MDT	Severe Thunderstorm Warning	MSO	Granite	30 min
Jul 8, 7:03 PM MDT	Severe Thunderstorm Warning	TFX	Chouteau, Hill, Liberty	27 min
Jul 8, 7:05 PM MDT	Severe Thunderstorm Warning	TFX	Fergus, Judith Basin	40 min
Jul 8, 7:07 PM MDT	Severe Thunderstorm Warning	MSO	Granite, Ravalli	23 min
Jul 8, 7:08 PM MDT	Severe Thunderstorm Warning	TFX	Chouteau, Fergus	31 min
Jul 8, 7:13 PM MDT	Severe Thunderstorm Warning	TFX	Hill	47 min
Jul 8, 7:21 PM MDT	Severe Thunderstorm Warning	MSO	Ravalli	39 min
Jul 8, 7:23 PM MDT	Severe Thunderstorm Warning Considerable damage threat	TFX	Chouteau, Hill, Liberty	37 min
Jul 8, 7:28 PM MDT	Severe Thunderstorm Warning Considerable damage threat	MSO	Missoula, Powell	32 min
Jul 8, 7:54 PM MDT	Severe Thunderstorm Warning Considerable damage threat	TFX	Blaine, Chouteau, Hill	51 min
Jul 8, 7:56 PM MDT	Severe Thunderstorm Warning	MSO	Powell	19 min
Jul 8, 8:22 PM MDT	Severe Thunderstorm Warning Considerable damage threat	GGW	Garfield, Petroleum, Phillips	53 min
Jul 8, 8:22 PM MDT	Severe Thunderstorm Warning Considerable damage threat	TFX	Blaine, Hill	53 min
Jul 8, 8:23 PM MDT	Severe Thunderstorm Warning Considerable damage threat	MSO	Granite, Missoula, Ravalli	37 min
Jul 8, 8:26 PM MDT	Severe Thunderstorm Warning Considerable damage threat	TFX	Blaine, Fergus	34 min
Jul 8, 8:41 PM MDT	Severe Thunderstorm Warning Considerable damage threat	TFX	Blaine, Hill	64 min
Jul 8, 8:50 PM MDT	Severe Thunderstorm Warning Considerable damage threat	MSO	Missoula	25 min
Jul 8, 8:55 PM MDT	Severe Thunderstorm Warning	GGW	Garfield, Petroleum	65 min
Jul 8, 8:58 PM MDT	Severe Thunderstorm Warning Considerable damage threat	TFX	Blaine	32 min
Jul 8, 9:08 PM MDT	Severe Thunderstorm Warning Destructive damage threat	TFX	Blaine	37 min
Jul 8, 9:09 PM MDT	Severe Thunderstorm Warning Considerable damage threat	MSO	Missoula, Powell	36 min
Jul 8, 9:11 PM MDT	Severe Thunderstorm Warning	GGW	Garfield, Petroleum, Phillips, Valley	64 min
Jul 8, 9:15 PM MDT	Severe Thunderstorm Warning Destructive damage threat	GGW	Phillips, Valley	60 min
Jul 8, 9:17 PM MDT	Severe Thunderstorm Warning	TFX	Lewis and Clark, Teton	9 min
Jul 8, 9:52 PM MDT	Severe Thunderstorm Warning	GGW	Garfield	53 min
Jul 8, 10:07 PM MDT	Severe Thunderstorm Warning Destructive damage threat	GGW	Daniels, Garfield, McCone, Phillips, Roosevelt, Valley	53 min
Jul 8, 10:41 PM MDT	Severe Thunderstorm Warning Considerable damage threat	GGW	Dawson, Garfield, McCone, Prairie, Valley	64 min
Jul 8, 10:48 PM MDT	Severe Thunderstorm Warning	GGW	Daniels, Dawson, Garfield, McCone, Richland, Roosevelt and 1 more	57 min
Jul 8, 11:30 PM MDT	Severe Thunderstorm Warning	TFX	Fergus	15 min
Jul 8, 11:41 PM MDT	Severe Thunderstorm Warning Considerable damage threat	GGW	Daniels, Dawson, McCone, Richland, Roosevelt, Sheridan and 1 more	64 min
Jul 9, 12:17 AM MDT	Severe Thunderstorm Warning Considerable damage threat	BYZ	Custer, Rosebud	28 min
Jul 9, 12:19 AM MDT	Severe Thunderstorm Warning	GGW	Garfield, McCone, Prairie	28 min
Jul 9, 12:38 AM MDT	Severe Thunderstorm Warning	GGW	Daniels, Dawson, McCone, Prairie, Richland, Roosevelt and 2 more	52 min
Jul 9, 1:23 AM MDT	Severe Thunderstorm Warning	GGW	Dawson, Richland, Roosevelt, Wibaux	37 min
Jul 9, 2:14 AM MDT	Severe Thunderstorm Warning	GGW	Garfield, McCone, Prairie	46 min
Jul 9, 2:48 AM MDT	Severe Thunderstorm Warning	GGW	Dawson, McCone, Prairie	22 min
Jul 9, 2:47 PM MDT	Severe Thunderstorm Warning	MSO	Ravalli	31 min
Jul 9, 3:36 PM MDT	Severe Thunderstorm Warning	MSO	Granite, Missoula, Ravalli	39 min
Jul 9, 3:44 PM MDT	Severe Thunderstorm Warning	MSO	Lake, Sanders	46 min
Jul 9, 3:45 PM MDT	Severe Thunderstorm Warning	MSO	Deer Lodge, Granite	30 min
Jul 9, 4:34 PM MDT	Severe Thunderstorm Warning	MSO	Flathead, Lake	24 min
Jul 9, 4:36 PM MDT	Severe Thunderstorm Warning	MSO	Powell	10 min
Jul 9, 5:01 PM MDT	Severe Thunderstorm Warning	MSO	Flathead, Lake	44 min
Jul 9, 5:05 PM MDT	Severe Thunderstorm Warning Considerable damage threat	MSO	Flathead, Lake	40 min
Jul 9, 5:43 PM MDT	Severe Thunderstorm Warning	TFX	Cascade, Chouteau, Teton	46 min
Jul 9, 5:46 PM MDT	Severe Thunderstorm Warning	TFX	Chouteau, Hill, Liberty	59 min
Jul 9, 5:52 PM MDT	Severe Thunderstorm Warning	BYZ	Wheatland	38 min
Jul 9, 6:26 PM MDT	Severe Thunderstorm Warning	BYZ	Golden Valley, Wheatland	34 min
Jul 9, 6:31 PM MDT	Severe Thunderstorm Warning	TFX	Blaine, Chouteau, Fergus, Judith Basin	59 min
Jul 9, 6:33 PM MDT	Severe Thunderstorm Warning	TFX	Cascade, Judith Basin	20 min
Jul 9, 6:35 PM MDT	Severe Thunderstorm Warning Considerable damage threat	TFX	Chouteau, Hill	55 min
Jul 9, 6:48 PM MDT	Severe Thunderstorm Warning	MSO	Lake, Missoula	14 min
Jul 9, 6:58 PM MDT	Severe Thunderstorm Warning Considerable damage threat	BYZ	Golden Valley, Musselshell, Wheatland	32 min
Jul 9, 6:58 PM MDT	Severe Thunderstorm Warning	TFX	Blaine, Chouteau, Hill	77 min
Jul 9, 7:00 PM MDT	Severe Thunderstorm Warning Considerable damage threat	TFX	Fergus	60 min
Jul 9, 7:06 PM MDT	Severe Thunderstorm Warning Considerable damage threat	TFX	Blaine, Chouteau, Fergus, Judith Basin	54 min
Jul 9, 7:20 PM MDT	Severe Thunderstorm Warning Considerable damage threat	GGW	Garfield, Petroleum	55 min
Jul 9, 7:27 PM MDT	Severe Thunderstorm Warning Considerable damage threat	BYZ	Musselshell	48 min
Jul 9, 7:41 PM MDT	Severe Thunderstorm Warning	GGW	Garfield, Petroleum, Phillips, Valley	64 min
Jul 9, 7:49 PM MDT	Severe Thunderstorm Warning	MSO	Granite, Missoula, Ravalli	26 min
Jul 9, 7:53 PM MDT	Severe Thunderstorm Warning	GGW	Phillips	67 min
Jul 9, 8:08 PM MDT	Severe Thunderstorm Warning Considerable damage threat	GGW	Garfield, Petroleum	67 min
Jul 9, 8:12 PM MDT	Severe Thunderstorm Warning	BYZ	Musselshell, Rosebud	63 min
Jul 9, 8:39 PM MDT	Severe Thunderstorm Warning	BYZ	Golden Valley, Musselshell	51 min
Jul 9, 8:49 PM MDT	Severe Thunderstorm Warning Considerable damage threat	GGW	Phillips, Valley	20 min
Jul 9, 8:59 PM MDT	Severe Thunderstorm Warning	BYZ	Musselshell, Rosebud, Treasure, Yellowstone	31 min
Jul 9, 9:07 PM MDT	Severe Thunderstorm Warning	GGW	Garfield	53 min
Jul 9, 9:14 PM MDT	Severe Thunderstorm Warning Considerable damage threat	BYZ	Rosebud	61 min
Jul 9, 9:17 PM MDT	Severe Thunderstorm Warning	BYZ	Musselshell	28 min
Jul 9, 9:17 PM MDT	Severe Thunderstorm Warning	GGW	Garfield, Petroleum	43 min
Jul 9, 9:27 PM MDT	Severe Thunderstorm Warning Considerable damage threat	BYZ	Rosebud, Treasure	63 min
Jul 9, 9:27 PM MDT	Severe Thunderstorm Warning	GGW	Garfield, McCone, Valley	63 min
Jul 9, 9:30 PM MDT	Severe Thunderstorm Warning	GGW	Valley	45 min
Jul 9, 9:40 PM MDT	Severe Thunderstorm Warning Considerable damage threat	BYZ	Musselshell, Rosebud, Treasure, Yellowstone	35 min
Jul 9, 9:45 PM MDT	Severe Thunderstorm Warning Considerable damage threat	GGW	Daniels, Garfield, McCone, Roosevelt, Valley	60 min
Jul 9, 9:54 PM MDT	Severe Thunderstorm Warning Considerable damage threat	GGW	Garfield, McCone, Prairie, Valley	66 min
Jul 9, 10:11 PM MDT	Severe Thunderstorm Warning Considerable damage threat	BYZ	Rosebud, Treasure	64 min
Jul 9, 10:30 PM MDT	Severe Thunderstorm Warning Considerable damage threat	GGW	Dawson, Garfield, McCone, Prairie, Richland, Wibaux	60 min
Jul 9, 10:36 PM MDT	Severe Thunderstorm Warning Considerable damage threat	GGW	Daniels, McCone, Richland, Roosevelt, Sheridan, Valley	54 min
Jul 9, 10:57 PM MDT	Severe Thunderstorm Warning Considerable damage threat	BYZ	Custer	63 min
Jul 9, 11:23 PM MDT	Severe Thunderstorm Warning	GGW	Daniels, McCone, Richland, Roosevelt, Sheridan	67 min
Jul 9, 11:27 PM MDT	Severe Thunderstorm Warning Considerable damage threat	GGW	Dawson, McCone, Prairie, Richland, Wibaux	63 min
Jul 9, 11:59 PM MDT	Severe Thunderstorm Warning Considerable damage threat	BYZ	Custer, Fallon	61 min
Jul 10, 12:20 AM MDT	Severe Thunderstorm Warning	GGW	Roosevelt, Sheridan	28 min
Jul 10, 12:24 AM MDT	Severe Thunderstorm Warning Considerable damage threat	GGW	Dawson, Prairie, Wibaux	51 min
Jul 10, 12:59 AM MDT	Severe Thunderstorm Warning Considerable damage threat	BYZ	Fallon	18 min
Jul 10, 7:31 PM MDT	Severe Thunderstorm Warning	BYZ	Powder River	44 min
Jul 10, 8:09 PM MDT	Severe Thunderstorm Warning	BYZ	Carter, Powder River	66 min
Jul 13, 1:30 PM MDT	Severe Thunderstorm Warning	TFX	Broadwater, Jefferson	45 min
Jul 13, 2:03 PM MDT	Severe Thunderstorm Warning	TFX	Beaverhead, Madison	27 min
Jul 13, 3:21 PM MDT	Severe Thunderstorm Warning	TFX	Broadwater, Gallatin, Jefferson, Madison	39 min
Jul 13, 3:42 PM MDT	Severe Thunderstorm Warning Considerable damage threat	BYZ	Carbon, Stillwater, Yellowstone	63 min
Jul 13, 3:46 PM MDT	Severe Thunderstorm Warning	TFX	Fergus, Judith Basin	44 min
Jul 13, 4:12 PM MDT	Severe Thunderstorm Warning	TFX	Madison	51 min
Jul 13, 4:30 PM MDT	Severe Thunderstorm Warning	TFX	Fergus	60 min
Jul 13, 7:35 PM MDT	Severe Thunderstorm Warning Considerable damage threat	GGW	Garfield, Valley	55 min
Jul 13, 8:26 PM MDT	Severe Thunderstorm Warning	BYZ	Custer, Rosebud	42 min
Jul 13, 8:26 PM MDT	Severe Thunderstorm Warning Considerable damage threat	GGW	Garfield, McCone, Valley	64 min
Jul 13, 9:07 PM MDT	Severe Thunderstorm Warning Considerable damage threat	GGW	Dawson, Garfield, McCone, Prairie, Richland, Roosevelt and 1 more	53 min
Jul 14, 3:43 PM MDT	Severe Thunderstorm Warning	BYZ	Big Horn, Carbon	47 min
Jul 14, 4:27 PM MDT	Severe Thunderstorm Warning	BYZ	Big Horn, Carbon	63 min
Jul 14, 6:39 PM MDT	Severe Thunderstorm Warning	BYZ	Golden Valley, Musselshell	27 min
Jul 14, 7:00 PM MDT	Severe Thunderstorm Warning	GGW	Petroleum	60 min
Jul 15, 12:13 PM MDT	Severe Thunderstorm Warning	TFX	Cascade, Chouteau, Judith Basin, Meagher, Pondera, Teton	62 min
Jul 15, 12:54 PM MDT	Severe Thunderstorm Warning	TFX	Cascade, Chouteau, Fergus, Judith Basin, Meagher	66 min
Jul 15, 1:12 PM MDT	Severe Thunderstorm Warning	TFX	Cascade, Chouteau, Judith Basin	63 min
Jul 15, 1:17 PM MDT	Severe Thunderstorm Warning	BYZ	Wheatland	58 min
Jul 15, 2:12 PM MDT	Severe Thunderstorm Warning	TFX	Blaine, Chouteau, Hill	20 min
Jul 15, 3:04 PM MDT	Severe Thunderstorm Warning	BYZ	Yellowstone	56 min
Jul 15, 4:30 PM MDT	Severe Thunderstorm Warning	MSO	Deer Lodge, Silver Bow	15 min
Jul 15, 4:55 PM MDT	Severe Thunderstorm Warning Considerable damage threat	BYZ	Big Horn, Rosebud, Treasure	50 min
Jul 15, 5:43 PM MDT	Severe Thunderstorm Warning Considerable damage threat	BYZ	Big Horn, Custer, Powder River, Rosebud	62 min
Jul 15, 8:47 PM MDT	Severe Thunderstorm Warning	GGW	Dawson, Richland, Wibaux	58 min
Jul 15, 9:04 PM MDT	Severe Thunderstorm Warning	GGW	Dawson, Prairie, Wibaux	56 min
Jul 15, 9:33 PM MDT	Severe Thunderstorm Warning	GGW	Dawson, Richland	57 min
Jul 15, 10:03 PM MDT	Severe Thunderstorm Warning	GGW	Richland, Wibaux	27 min
Jul 18, 2:25 AM MDT	Severe Thunderstorm Warning	TFX	Glacier	50 min
Jul 18, 3:05 AM MDT	Severe Thunderstorm Warning Considerable damage threat	TFX	Glacier, Toole	25 min
Jul 18, 3:25 AM MDT	Severe Thunderstorm Warning Destructive damage threat	TFX	Glacier, Hill, Liberty, Toole	50 min
Jul 18, 4:11 AM MDT	Severe Thunderstorm Warning	TFX	Hill, Liberty, Toole	49 min
Jul 18, 11:31 AM MDT	Severe Thunderstorm Warning	TFX	Glacier, Pondera, Toole	44 min
Jul 18, 12:07 PM MDT	Severe Thunderstorm Warning	TFX	Liberty, Pondera, Toole	38 min
Jul 18, 12:41 PM MDT	Severe Thunderstorm Warning	TFX	Glacier, Liberty, Pondera, Toole	49 min
Jul 18, 4:01 PM MDT	Severe Thunderstorm Warning	GGW	Phillips, Valley	59 min
Jul 18, 4:05 PM MDT	Severe Thunderstorm Warning	GGW	Phillips, Valley	55 min
Jul 18, 4:29 PM MDT	Severe Thunderstorm Warning Considerable damage threat	GGW	Phillips, Valley	61 min
Jul 18, 4:53 PM MDT	Severe Thunderstorm Warning	GGW	Dawson, McCone, Richland	36 min
Jul 18, 4:58 PM MDT	Severe Thunderstorm Warning Considerable damage threat	GGW	Garfield, McCone	62 min
Jul 18, 5:00 PM MDT	Severe Thunderstorm Warning Considerable damage threat	GGW	Garfield, McCone, Roosevelt, Valley	50 min
Jul 18, 5:29 PM MDT	Severe Thunderstorm Warning	GGW	Daniels, Roosevelt, Sheridan, Valley	61 min
Jul 18, 6:24 PM MDT	Severe Thunderstorm Warning	GGW	Daniels, Valley	51 min
Jul 18, 6:28 PM MDT	Severe Thunderstorm Warning	GGW	Daniels, Roosevelt, Sheridan	62 min
Jul 18, 7:42 PM MDT	Severe Thunderstorm Warning	GGW	Roosevelt, Sheridan	63 min
Jul 18, 8:07 PM MDT	Severe Thunderstorm Warning Considerable damage threat	GGW	Richland, Roosevelt, Sheridan	45 min
Jul 24, 1:38 PM MDT	Severe Thunderstorm Warning	TFX	Jefferson	37 min
Jul 24, 2:22 PM MDT	Severe Thunderstorm Warning	TFX	Cascade	23 min
Jul 24, 2:44 PM MDT	Severe Thunderstorm Warning	TFX	Cascade, Judith Basin	46 min
Jul 24, 4:53 PM MDT	Severe Thunderstorm Warning	TFX	Meagher	25 min
Jul 24, 5:51 PM MDT	Severe Thunderstorm Warning	BYZ	Golden Valley, Musselshell, Stillwater, Yellowstone	54 min
Jul 24, 6:23 PM MDT	Severe Thunderstorm Warning	BYZ	Stillwater, Yellowstone	67 min
Jul 24, 6:53 PM MDT	Severe Thunderstorm Warning	BYZ	Big Horn, Rosebud	34 min
Jul 24, 7:15 PM MDT	Severe Thunderstorm Warning Considerable damage threat	BYZ	Big Horn, Yellowstone	60 min
Jul 24, 7:59 PM MDT	Severe Thunderstorm Warning	BYZ	Big Horn	61 min
Aug 4, 2:16 PM MDT	Severe Thunderstorm Warning	TFX	Broadwater, Gallatin, Meagher	29 min
Aug 4, 3:41 PM MDT	Severe Thunderstorm Warning	TFX	Blaine, Chouteau, Fergus	34 min
Aug 4, 4:55 PM MDT	Severe Thunderstorm Warning	GGW	Garfield, Petroleum, Phillips, Valley	65 min
Aug 4, 6:25 PM MDT	Severe Thunderstorm Warning	GGW	Daniels, Roosevelt, Sheridan, Valley	65 min
Aug 12, 2:40 PM MDT	Severe Thunderstorm Warning	MSO	Mineral, Sanders	35 min
Aug 12, 3:16 PM MDT	Severe Thunderstorm Warning	MSO	Flathead, Lincoln, Sanders	29 min
Aug 12, 3:26 PM MDT	Severe Thunderstorm Warning	MSO	Mineral, Sanders	34 min
Aug 12, 3:31 PM MDT	Severe Thunderstorm Warning	MSO	Mineral, Missoula, Sanders	29 min
Aug 12, 3:45 PM MDT	Severe Thunderstorm Warning	TFX	Glacier	30 min
Aug 12, 4:22 PM MDT	Severe Thunderstorm Warning	MSO	Deer Lodge, Granite	53 min
Aug 12, 5:27 PM MDT	Severe Thunderstorm Warning	GGW	Phillips	63 min
Aug 12, 5:32 PM MDT	Severe Thunderstorm Warning	TFX	Glacier	28 min
Aug 12, 7:13 PM MDT	Severe Thunderstorm Warning	TFX	Cascade, Pondera, Teton	32 min
Aug 12, 7:36 PM MDT	Severe Thunderstorm Warning	TFX	Hill	54 min
Aug 12, 8:27 PM MDT	Severe Thunderstorm Warning	TFX	Blaine, Hill	48 min
Aug 13, 12:46 PM MDT	Severe Thunderstorm Warning	TFX	Meagher	29 min
Aug 13, 5:09 PM MDT	Severe Thunderstorm Warning Considerable damage threat	BYZ	Big Horn, Yellowstone	51 min
Aug 17, 2:21 PM MDT	Severe Thunderstorm Warning	BYZ	Carter	24 min
Aug 17, 5:21 PM MDT	Severe Thunderstorm Warning	GGW	Sheridan	54 min
Aug 17, 6:12 PM MDT	Severe Thunderstorm Warning	GGW	Roosevelt, Sheridan	30 min
Aug 17, 6:57 PM MDT	Severe Thunderstorm Warning	GGW	Richland	63 min
Aug 23, 4:21 PM MDT	Severe Thunderstorm Warning	MSO	Powell	39 min
Aug 23, 8:35 PM MDT	Severe Thunderstorm Warning	TFX	Glacier	25 min
Aug 23, 9:34 PM MDT	Severe Thunderstorm Warning	TFX	Glacier, Pondera	41 min
Aug 24, 9:57 PM MDT	Severe Thunderstorm Warning	TFX	Gallatin	30 min
Aug 24, 10:26 PM MDT	Severe Thunderstorm Warning	TFX	Gallatin, Meagher	25 min
Aug 25, 2:52 PM MDT	Severe Thunderstorm Warning	MSO	Mineral, Missoula, Sanders	38 min
Aug 25, 4:35 PM MDT	Severe Thunderstorm Warning	MSO	Lake, Missoula, Sanders	40 min
Aug 25, 4:39 PM MDT	Severe Thunderstorm Warning	TFX	Beaverhead	25 min
Aug 25, 4:47 PM MDT	Severe Thunderstorm Warning	TFX	Beaverhead	43 min
Aug 25, 5:06 PM MDT	Severe Thunderstorm Warning	TFX	Broadwater	24 min
Aug 25, 5:37 PM MDT	Severe Thunderstorm Warning	TFX	Teton	53 min
Aug 25, 5:51 PM MDT	Severe Thunderstorm Warning	TFX	Meagher	24 min
Aug 25, 6:24 PM MDT	Severe Thunderstorm Warning Considerable damage threat	TFX	Teton	66 min
Aug 25, 6:24 PM MDT	Severe Thunderstorm Warning	TFX	Cascade, Lewis and Clark	36 min
Aug 25, 6:37 PM MDT	Severe Thunderstorm Warning	TFX	Cascade	38 min
Aug 25, 7:22 PM MDT	Severe Thunderstorm Warning	TFX	Cascade, Lewis and Clark, Teton	23 min
Aug 25, 7:31 PM MDT	Severe Thunderstorm Warning	TFX	Cascade, Teton	11 min
Aug 26, 2:29 PM MDT	Severe Thunderstorm Warning	BYZ	Big Horn	61 min
Aug 26, 4:51 PM MDT	Severe Thunderstorm Warning	BYZ	Carter	39 min
Sep 3, 9:48 PM MDT	Severe Thunderstorm Warning	TFX	Glacier, Pondera, Teton, Toole	57 min
Sep 3, 10:48 PM MDT	Severe Thunderstorm Warning	TFX	Glacier, Pondera, Toole	57 min
Sep 4, 12:57 AM MDT	Severe Thunderstorm Warning Considerable damage threat	TFX	Chouteau, Hill, Liberty, Toole	63 min
Sep 4, 2:02 AM MDT	Severe Thunderstorm Warning	TFX	Chouteau, Hill, Liberty	58 min
Sep 4, 2:53 AM MDT	Severe Thunderstorm Warning	TFX	Blaine, Chouteau, Hill	82 min
Sep 7, 4:02 PM MDT	Severe Thunderstorm Warning	BYZ	Big Horn, Carbon, Stillwater, Yellowstone	28 min
Sep 7, 4:28 PM MDT	Severe Thunderstorm Warning	BYZ	Big Horn, Golden Valley, Musselshell, Yellowstone	62 min
Sep 7, 5:28 PM MDT	Severe Thunderstorm Warning Considerable damage threat	TFX	Broadwater, Cascade, Jefferson, Lewis and Clark, Meagher	32 min
Sep 7, 5:57 PM MDT	Severe Thunderstorm Warning Considerable damage threat	TFX	Broadwater, Cascade, Chouteau, Judith Basin, Meagher, Teton	33 min
Sep 7, 6:32 PM MDT	Severe Thunderstorm Warning Considerable damage threat	TFX	Cascade, Chouteau, Judith Basin, Meagher	28 min
Sep 7, 8:32 PM MDT	Severe Thunderstorm Warning	GGW	Phillips	58 min
Sep 22, 3:51 PM MDT	Severe Thunderstorm Warning	BYZ	Big Horn, Custer, Powder River, Rosebud	39 min
Sep 29, 2:42 PM MDT	Severe Thunderstorm Warning	MSO	Granite	33 min
Oct 2, 5:15 PM MDT	Severe Thunderstorm Warning	BYZ	Carter	45 min

By county

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

15 more counties

The busiest days

Days with the most alerts issued, by UTC date.

Nearby

Alerts in force now Tornadoes on record The radar archive 2021 2023

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.