Alert archive / Montana / Severe Thunderstorm Warnings

Severe Thunderstorm Warnings in Montana, 2025

549 severe thunderstorm warnings in 2025. 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 2025. Tap one for its archive.

Severe Thunderstorm Warnings: 549
Busiest month: July215 severe thunderstorm warnings
Busiest day: June 16, 202565 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.

184 of 549 severe thunderstorm warnings covering Montana in 2025 had a qualifying storm report inside them; 344 of 531 hail, wind and damage reports fell inside a warning, on average 26 minutes after it went out.

Montana, 2025

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
Severe thunderstorm warnings	549	184	66%	531	65%	26 min

Each office's whole area, 2025

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
NWS Billings, MT: severe thunderstorm warnings	260	77	70%	213	67%	27 min
NWS Missoula, MT: severe thunderstorm warnings	9	2	78%	12	17%	21 min
NWS Great Falls, MT: severe thunderstorm warnings	165	54	67%	192	55%	24 min
NWS Glasgow, MT: severe thunderstorm warnings	126	52	59%	124	78%	28 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
Apr 27, 4:37 PM MDT	Severe Thunderstorm Warning	BYZ	Custer, Powder River, Rosebud	38 min
Apr 27, 5:09 PM MDT	Severe Thunderstorm Warning	BYZ	Big Horn	18 min
Apr 27, 5:16 PM MDT	Severe Thunderstorm Warning	BYZ	Big Horn, Custer, Powder River, Rosebud	59 min
Apr 27, 6:05 PM MDT	Severe Thunderstorm Warning	BYZ	Custer, Powder River	55 min
Apr 27, 6:42 PM MDT	Severe Thunderstorm Warning	BYZ	Big Horn, Rosebud	28 min
Apr 27, 6:53 PM MDT	Severe Thunderstorm Warning	BYZ	Carter, Custer, Powder River	52 min
Apr 27, 7:44 PM MDT	Severe Thunderstorm Warning	BYZ	Carter, Custer, Powder River	61 min
Apr 27, 8:40 PM MDT	Severe Thunderstorm Warning	BYZ	Carter, Custer, Fallon	80 min
Apr 27, 9:56 PM MDT	Severe Thunderstorm Warning	BYZ	Carter	64 min
May 10, 3:05 PM MDT	Severe Thunderstorm Warning	TFX	Cascade	55 min
May 10, 3:53 PM MDT	Severe Thunderstorm Warning	TFX	Chouteau	52 min
May 10, 4:00 PM MDT	Severe Thunderstorm Warning	TFX	Broadwater, Jefferson, Lewis and Clark	60 min
May 10, 5:07 PM MDT	Severe Thunderstorm Warning	TFX	Blaine, Chouteau, Hill	68 min
May 10, 5:17 PM MDT	Severe Thunderstorm Warning	TFX	Blaine, Chouteau, Fergus	58 min
May 10, 5:21 PM MDT	Severe Thunderstorm Warning	TFX	Blaine, Chouteau, Fergus, Judith Basin	54 min
May 10, 5:48 PM MDT	Severe Thunderstorm Warning	TFX	Blaine, Hill	57 min
May 10, 5:59 PM MDT	Severe Thunderstorm Warning	GGW	Phillips	61 min
May 10, 6:13 PM MDT	Severe Thunderstorm Warning	TFX	Blaine, Fergus	62 min
May 10, 6:31 PM MDT	Severe Thunderstorm Warning	TFX	Fergus, Judith Basin	59 min
May 10, 6:41 PM MDT	Severe Thunderstorm Warning	TFX	Blaine	27 min
May 10, 6:57 PM MDT	Severe Thunderstorm Warning	GGW	Garfield, Petroleum, Phillips	63 min
May 10, 7:05 PM MDT	Severe Thunderstorm Warning	TFX	Cascade, Chouteau	55 min
May 10, 7:21 PM MDT	Severe Thunderstorm Warning	TFX	Fergus	24 min
May 10, 7:42 PM MDT	Severe Thunderstorm Warning	TFX	Blaine, Hill	37 min
May 10, 7:50 PM MDT	Severe Thunderstorm Warning	GGW	Garfield, McCone, Petroleum, Phillips, Valley	55 min
May 10, 8:43 PM MDT	Severe Thunderstorm Warning	GGW	Daniels, Garfield, McCone, Roosevelt, Valley	25 min
May 10, 10:22 PM MDT	Severe Thunderstorm Warning	GGW	Valley	23 min
May 10, 10:44 PM MDT	Severe Thunderstorm Warning Considerable damage threat	GGW	Valley	61 min
May 11, 2:44 PM MDT	Severe Thunderstorm Warning	TFX	Cascade, Chouteau, Pondera, Teton	46 min
May 11, 3:27 PM MDT	Severe Thunderstorm Warning	TFX	Cascade, Chouteau, Fergus, Hill, Judith Basin, Teton	63 min
May 11, 4:27 PM MDT	Severe Thunderstorm Warning	TFX	Blaine, Chouteau, Fergus, Hill	93 min
May 11, 5:56 PM MDT	Severe Thunderstorm Warning	TFX	Blaine, Chouteau, Fergus, Hill	58 min
May 11, 6:01 PM MDT	Severe Thunderstorm Warning	BYZ	Custer, Rosebud	29 min
May 11, 6:12 PM MDT	Severe Thunderstorm Warning	BYZ	Custer	48 min
May 11, 6:21 PM MDT	Severe Thunderstorm Warning	GGW	Phillips	54 min
May 11, 6:44 PM MDT	Severe Thunderstorm Warning	BYZ	Custer	31 min
May 11, 6:58 PM MDT	Severe Thunderstorm Warning	GGW	Dawson, Prairie, Wibaux	62 min
May 11, 7:01 PM MDT	Severe Thunderstorm Warning	MSO	Sanders	44 min
May 12, 12:27 AM MDT	Severe Thunderstorm Warning	MSO	Flathead	48 min
May 12, 4:06 PM MDT	Severe Thunderstorm Warning	TFX	Blaine, Hill	34 min
May 12, 8:24 PM MDT	Severe Thunderstorm Warning	GGW	Dawson, Garfield, McCone, Richland, Roosevelt, Valley	66 min
May 12, 8:27 PM MDT	Severe Thunderstorm Warning	GGW	Garfield	63 min
Jun 1, 3:55 PM MDT	Severe Thunderstorm Warning	TFX	Beaverhead	35 min
Jun 1, 4:52 PM MDT	Severe Thunderstorm Warning	TFX	Beaverhead, Madison	23 min
Jun 1, 5:14 PM MDT	Severe Thunderstorm Warning	TFX	Gallatin, Madison	42 min
Jun 10, 7:17 PM MDT	Severe Thunderstorm Warning	TFX	Glacier, Pondera	28 min
Jun 10, 7:30 PM MDT	Severe Thunderstorm Warning	TFX	Fergus	45 min
Jun 10, 7:42 PM MDT	Severe Thunderstorm Warning	TFX	Glacier, Pondera	33 min
Jun 10, 7:50 PM MDT	Severe Thunderstorm Warning	BYZ	Golden Valley, Musselshell	25 min
Jun 11, 5:15 PM MDT	Severe Thunderstorm Warning	BYZ	Powder River	29 min
Jun 11, 5:41 PM MDT	Severe Thunderstorm Warning	BYZ	Custer, Powder River, Rosebud	33 min
Jun 12, 3:57 PM MDT	Severe Thunderstorm Warning	BYZ	Big Horn, Treasure	48 min
Jun 12, 4:38 PM MDT	Severe Thunderstorm Warning	BYZ	Custer, Powder River	37 min
Jun 12, 5:37 PM MDT	Severe Thunderstorm Warning	BYZ	Powder River	53 min
Jun 13, 1:16 PM MDT	Severe Thunderstorm Warning	TFX	Broadwater, Gallatin	29 min
Jun 13, 1:39 PM MDT	Severe Thunderstorm Warning	TFX	Broadwater, Gallatin, Meagher	36 min
Jun 13, 2:16 PM MDT	Severe Thunderstorm Warning Considerable damage threat	BYZ	Wheatland	59 min
Jun 13, 2:18 PM MDT	Severe Thunderstorm Warning	BYZ	Park	42 min
Jun 13, 3:08 PM MDT	Severe Thunderstorm Warning Considerable damage threat	BYZ	Golden Valley, Wheatland	67 min
Jun 13, 3:27 PM MDT	Severe Thunderstorm Warning	BYZ	Golden Valley, Sweet Grass, Wheatland	63 min
Jun 13, 3:29 PM MDT	Severe Thunderstorm Warning	TFX	Fergus	46 min
Jun 13, 3:38 PM MDT	Severe Thunderstorm Warning	GGW	Petroleum	67 min
Jun 13, 3:40 PM MDT	Severe Thunderstorm Warning	TFX	Chouteau, Hill	19 min
Jun 13, 4:01 PM MDT	Severe Thunderstorm Warning Considerable damage threat	BYZ	Golden Valley, Musselshell, Stillwater, Sweet Grass, Wheatland, Yellowstone	59 min
Jun 13, 4:07 PM MDT	Severe Thunderstorm Warning	TFX	Blaine, Hill	38 min
Jun 13, 4:11 PM MDT	Severe Thunderstorm Warning Considerable damage threat	BYZ	Golden Valley, Musselshell, Stillwater, Wheatland, Yellowstone	64 min
Jun 13, 4:14 PM MDT	Severe Thunderstorm Warning	TFX	Fergus	20 min
Jun 13, 4:20 PM MDT	Severe Thunderstorm Warning	TFX	Blaine, Hill	40 min
Jun 13, 4:39 PM MDT	Severe Thunderstorm Warning Considerable damage threat	GGW	Garfield, Petroleum	66 min
Jun 13, 5:11 PM MDT	Severe Thunderstorm Warning	BYZ	Golden Valley, Musselshell, Yellowstone	64 min
Jun 13, 5:12 PM MDT	Severe Thunderstorm Warning	BYZ	Stillwater, Sweet Grass	63 min
Jun 13, 5:55 PM MDT	Severe Thunderstorm Warning	BYZ	Musselshell, Yellowstone	29 min
Jun 13, 5:59 PM MDT	Severe Thunderstorm Warning Considerable damage threat	BYZ	Carbon, Stillwater, Yellowstone	46 min
Jun 13, 6:02 PM MDT	Severe Thunderstorm Warning Considerable damage threat	BYZ	Yellowstone	44 min
Jun 13, 6:32 PM MDT	Severe Thunderstorm Warning Considerable damage threat	BYZ	Big Horn, Treasure, Yellowstone	58 min
Jun 13, 6:46 PM MDT	Severe Thunderstorm Warning	BYZ	Big Horn, Carbon, Yellowstone	44 min
Jun 13, 7:04 PM MDT	Severe Thunderstorm Warning	BYZ	Carter, Powder River	56 min
Jun 13, 7:25 PM MDT	Severe Thunderstorm Warning Considerable damage threat	BYZ	Big Horn, Powder River, Rosebud, Treasure	65 min
Jun 13, 7:44 PM MDT	Severe Thunderstorm Warning	BYZ	Big Horn, Carbon	50 min
Jun 13, 7:45 PM MDT	Severe Thunderstorm Warning	BYZ	Big Horn, Rosebud, Treasure	60 min
Jun 13, 7:48 PM MDT	Severe Thunderstorm Warning	BYZ	Big Horn	38 min
Jun 13, 7:58 PM MDT	Severe Thunderstorm Warning	BYZ	Carter	32 min
Jun 13, 8:07 PM MDT	Severe Thunderstorm Warning	BYZ	Custer, Rosebud	53 min
Jun 13, 8:23 PM MDT	Severe Thunderstorm Warning	BYZ	Powder River	38 min
Jun 13, 8:25 PM MDT	Severe Thunderstorm Warning	BYZ	Big Horn, Powder River, Rosebud	65 min
Jun 13, 8:57 PM MDT	Severe Thunderstorm Warning	BYZ	Custer, Powder River, Rosebud	32 min
Jun 13, 9:05 PM MDT	Severe Thunderstorm Warning	BYZ	Big Horn, Rosebud	40 min
Jun 13, 9:05 PM MDT	Severe Thunderstorm Warning	BYZ	Carter	40 min
Jun 13, 9:17 PM MDT	Severe Thunderstorm Warning	BYZ	Carter, Custer, Powder River	35 min
Jun 13, 9:28 PM MDT	Severe Thunderstorm Warning	BYZ	Big Horn, Carter, Custer, Powder River, Rosebud	62 min
Jun 13, 9:34 PM MDT	Severe Thunderstorm Warning	BYZ	Big Horn, Rosebud	19 min
Jun 13, 9:41 PM MDT	Severe Thunderstorm Warning	BYZ	Carter, Fallon	49 min
Jun 13, 9:44 PM MDT	Severe Thunderstorm Warning	BYZ	Big Horn	61 min
Jun 13, 10:11 PM MDT	Severe Thunderstorm Warning	BYZ	Big Horn, Powder River, Rosebud	64 min
Jun 13, 10:18 PM MDT	Severe Thunderstorm Warning	BYZ	Fallon	12 min
Jun 13, 10:24 PM MDT	Severe Thunderstorm Warning	BYZ	Carter, Custer, Powder River	75 min
Jun 13, 10:27 PM MDT	Severe Thunderstorm Warning	BYZ	Fallon	33 min
Jun 14, 4:34 PM MDT	Severe Thunderstorm Warning	BYZ	Golden Valley, Stillwater, Sweet Grass	28 min
Jun 14, 5:18 PM MDT	Severe Thunderstorm Warning	BYZ	Golden Valley, Stillwater, Sweet Grass, Yellowstone	46 min
Jun 14, 5:44 PM MDT	Severe Thunderstorm Warning	TFX	Fergus	61 min
Jun 14, 6:26 PM MDT	Severe Thunderstorm Warning	TFX	Fergus, Judith Basin	49 min
Jun 14, 6:43 PM MDT	Severe Thunderstorm Warning	TFX	Fergus	47 min
Jun 14, 6:49 PM MDT	Severe Thunderstorm Warning	TFX	Fergus	43 min
Jun 14, 7:07 PM MDT	Severe Thunderstorm Warning Considerable damage threat	TFX	Fergus, Judith Basin	53 min
Jun 14, 7:39 PM MDT	Severe Thunderstorm Warning	TFX	Fergus	50 min
Jun 14, 7:55 PM MDT	Severe Thunderstorm Warning	BYZ	Powder River	43 min
Jun 14, 7:56 PM MDT	Severe Thunderstorm Warning Considerable damage threat	TFX	Blaine, Fergus	64 min
Jun 14, 8:22 PM MDT	Severe Thunderstorm Warning	BYZ	Carter, Powder River	39 min
Jun 14, 8:38 PM MDT	Severe Thunderstorm Warning	BYZ	Powder River	23 min
Jun 14, 10:23 PM MDT	Severe Thunderstorm Warning	BYZ	Wheatland	37 min
Jun 14, 10:58 PM MDT	Severe Thunderstorm Warning	BYZ	Wheatland	47 min
Jun 14, 11:21 PM MDT	Severe Thunderstorm Warning	TFX	Fergus, Judith Basin	39 min
Jun 14, 11:25 PM MDT	Severe Thunderstorm Warning	BYZ	Carter	26 min
Jun 14, 11:39 PM MDT	Severe Thunderstorm Warning	TFX	Judith Basin	36 min
Jun 14, 11:43 PM MDT	Severe Thunderstorm Warning	BYZ	Wheatland	16 min
Jun 15, 12:13 AM MDT	Severe Thunderstorm Warning	GGW	Garfield, Petroleum	62 min
Jun 15, 1:14 AM MDT	Severe Thunderstorm Warning	GGW	Garfield	61 min
Jun 15, 1:17 AM MDT	Severe Thunderstorm Warning	TFX	Fergus	42 min
Jun 15, 2:07 AM MDT	Severe Thunderstorm Warning	GGW	Dawson, McCone	53 min
Jun 15, 5:49 AM MDT	Severe Thunderstorm Warning	GGW	McCone, Prairie	26 min
Jun 15, 6:15 AM MDT	Severe Thunderstorm Warning	GGW	Dawson, Garfield, McCone, Prairie	60 min
Jun 15, 6:49 AM MDT	Severe Thunderstorm Warning	GGW	Garfield	56 min
Jun 15, 1:53 PM MDT	Severe Thunderstorm Warning	TFX	Judith Basin	25 min
Jun 15, 2:12 PM MDT	Severe Thunderstorm Warning Considerable damage threat	TFX	Fergus, Judith Basin	33 min
Jun 15, 2:23 PM MDT	Severe Thunderstorm Warning	TFX	Fergus	26 min
Jun 15, 2:33 PM MDT	Severe Thunderstorm Warning	TFX	Chouteau	27 min
Jun 15, 3:05 PM MDT	Severe Thunderstorm Warning	TFX	Fergus	25 min
Jun 15, 3:23 PM MDT	Severe Thunderstorm Warning	TFX	Cascade, Chouteau, Teton	52 min
Jun 15, 3:23 PM MDT	Severe Thunderstorm Warning	TFX	Judith Basin	37 min
Jun 15, 3:49 PM MDT	Severe Thunderstorm Warning	TFX	Cascade, Chouteau, Teton	41 min
Jun 15, 3:56 PM MDT	Severe Thunderstorm Warning	TFX	Chouteau	64 min
Jun 15, 4:22 PM MDT	Severe Thunderstorm Warning Considerable damage threat	TFX	Cascade, Chouteau	38 min
Jun 15, 4:25 PM MDT	Severe Thunderstorm Warning	TFX	Fergus	21 min
Jun 15, 4:48 PM MDT	Severe Thunderstorm Warning	TFX	Cascade, Judith Basin, Meagher	27 min
Jun 15, 4:50 PM MDT	Severe Thunderstorm Warning	TFX	Blaine, Chouteau	55 min
Jun 15, 4:57 PM MDT	Severe Thunderstorm Warning Considerable damage threat	TFX	Blaine, Chouteau, Fergus	33 min
Jun 15, 5:07 PM MDT	Severe Thunderstorm Warning	TFX	Judith Basin, Meagher	23 min
Jun 15, 5:15 PM MDT	Severe Thunderstorm Warning	TFX	Fergus	35 min
Jun 15, 5:27 PM MDT	Severe Thunderstorm Warning	GGW	Phillips	63 min
Jun 15, 5:29 PM MDT	Severe Thunderstorm Warning	TFX	Chouteau, Fergus, Judith Basin	40 min
Jun 15, 5:41 PM MDT	Severe Thunderstorm Warning	TFX	Fergus, Judith Basin	64 min
Jun 15, 5:47 PM MDT	Severe Thunderstorm Warning	GGW	Sheridan	28 min
Jun 15, 6:04 PM MDT	Severe Thunderstorm Warning	BYZ	Golden Valley, Wheatland	41 min
Jun 15, 6:04 PM MDT	Severe Thunderstorm Warning Considerable damage threat	TFX	Fergus	26 min
Jun 15, 6:32 PM MDT	Severe Thunderstorm Warning	GGW	Petroleum	58 min
Jun 15, 6:38 PM MDT	Severe Thunderstorm Warning	GGW	Phillips, Valley	67 min
Jun 15, 6:49 PM MDT	Severe Thunderstorm Warning	BYZ	Stillwater, Sweet Grass	32 min
Jun 15, 6:53 PM MDT	Severe Thunderstorm Warning	TFX	Fergus	30 min
Jun 15, 6:54 PM MDT	Severe Thunderstorm Warning	BYZ	Golden Valley, Wheatland	36 min
Jun 15, 7:02 PM MDT	Severe Thunderstorm Warning	BYZ	Carbon, Stillwater	28 min
Jun 15, 7:03 PM MDT	Severe Thunderstorm Warning	BYZ	Golden Valley, Stillwater, Sweet Grass	27 min
Jun 15, 7:04 PM MDT	Severe Thunderstorm Warning	BYZ	Stillwater	26 min
Jun 15, 7:10 PM MDT	Severe Thunderstorm Warning	GGW	Phillips, Valley	65 min
Jun 15, 7:16 PM MDT	Severe Thunderstorm Warning Considerable damage threat	GGW	Garfield, Petroleum	59 min
Jun 15, 7:22 PM MDT	Severe Thunderstorm Warning	BYZ	Carbon, Stillwater	10 min
Jun 15, 7:27 PM MDT	Severe Thunderstorm Warning	BYZ	Golden Valley, Musselshell	44 min
Jun 15, 7:39 PM MDT	Severe Thunderstorm Warning	BYZ	Big Horn	51 min
Jun 15, 7:48 PM MDT	Severe Thunderstorm Warning Considerable damage threat	GGW	Dawson, Garfield, McCone, Richland, Roosevelt, Valley	57 min
Jun 15, 8:01 PM MDT	Severe Thunderstorm Warning	BYZ	Big Horn	44 min
Jun 15, 8:01 PM MDT	Severe Thunderstorm Warning Considerable damage threat	BYZ	Rosebud	44 min
Jun 15, 8:04 PM MDT	Severe Thunderstorm Warning	BYZ	Carbon, Stillwater	56 min
Jun 15, 8:06 PM MDT	Severe Thunderstorm Warning	GGW	Garfield	54 min
Jun 15, 8:10 PM MDT	Severe Thunderstorm Warning	BYZ	Golden Valley, Musselshell	54 min
Jun 15, 8:23 PM MDT	Severe Thunderstorm Warning	BYZ	Custer	44 min
Jun 15, 8:28 PM MDT	Severe Thunderstorm Warning	GGW	Prairie	62 min
Jun 15, 8:37 PM MDT	Severe Thunderstorm Warning Considerable damage threat	GGW	McCone, Richland, Roosevelt, Valley	68 min
Jun 15, 8:39 PM MDT	Severe Thunderstorm Warning	BYZ	Rosebud	44 min
Jun 15, 8:43 PM MDT	Severe Thunderstorm Warning	BYZ	Big Horn, Powder River, Rosebud	47 min
Jun 15, 8:55 PM MDT	Severe Thunderstorm Warning	GGW	Garfield, McCone, Prairie	65 min
Jun 15, 8:59 PM MDT	Severe Thunderstorm Warning	BYZ	Big Horn, Treasure, Yellowstone	46 min
Jun 15, 9:03 PM MDT	Severe Thunderstorm Warning	BYZ	Musselshell, Rosebud, Treasure, Yellowstone	25 min
Jun 15, 9:06 PM MDT	Severe Thunderstorm Warning	BYZ	Rosebud	24 min
Jun 15, 9:06 PM MDT	Severe Thunderstorm Warning	BYZ	Custer, Powder River	54 min
Jun 15, 9:22 PM MDT	Severe Thunderstorm Warning Considerable damage threat	BYZ	Custer, Rosebud	38 min
Jun 15, 9:30 PM MDT	Severe Thunderstorm Warning	BYZ	Powder River	36 min
Jun 15, 9:40 PM MDT	Severe Thunderstorm Warning	GGW	Daniels, Richland, Roosevelt, Sheridan	65 min
Jun 15, 9:41 PM MDT	Severe Thunderstorm Warning Considerable damage threat	BYZ	Big Horn, Custer, Powder River, Rosebud, Treasure	64 min
Jun 15, 9:47 PM MDT	Severe Thunderstorm Warning	BYZ	Carter, Fallon	58 min
Jun 15, 9:49 PM MDT	Severe Thunderstorm Warning Considerable damage threat	BYZ	Custer, Powder River	26 min
Jun 15, 9:57 PM MDT	Severe Thunderstorm Warning	GGW	Garfield, Prairie	63 min
Jun 15, 10:14 PM MDT	Severe Thunderstorm Warning Considerable damage threat	BYZ	Carter, Custer, Powder River	31 min
Jun 15, 10:14 PM MDT	Severe Thunderstorm Warning	BYZ	Custer, Powder River, Rosebud	46 min
Jun 15, 10:22 PM MDT	Severe Thunderstorm Warning Considerable damage threat	GGW	Dawson, Richland, Wibaux	68 min
Jun 15, 10:44 PM MDT	Severe Thunderstorm Warning	BYZ	Carter, Fallon	46 min
Jun 15, 10:48 PM MDT	Severe Thunderstorm Warning	GGW	Richland	42 min
Jun 15, 10:58 PM MDT	Severe Thunderstorm Warning	BYZ	Carter, Custer, Fallon	62 min
Jun 16, 12:39 AM MDT	Severe Thunderstorm Warning Considerable damage threat	BYZ	Fallon	66 min
Jun 16, 1:30 PM MDT	Severe Thunderstorm Warning	BYZ	Park, Sweet Grass, Wheatland	34 min
Jun 16, 1:30 PM MDT	Severe Thunderstorm Warning	TFX	Meagher	35 min
Jun 16, 2:59 PM MDT	Severe Thunderstorm Warning	BYZ	Carbon	46 min
Jun 16, 3:02 PM MDT	Severe Thunderstorm Warning	BYZ	Golden Valley, Wheatland	43 min
Jun 16, 3:07 PM MDT	Severe Thunderstorm Warning	BYZ	Park, Sweet Grass	38 min
Jun 16, 3:37 PM MDT	Severe Thunderstorm Warning	BYZ	Big Horn, Carbon	38 min
Jun 16, 3:38 PM MDT	Severe Thunderstorm Warning	BYZ	Golden Valley, Stillwater, Yellowstone	52 min
Jun 16, 3:42 PM MDT	Severe Thunderstorm Warning	BYZ	Sweet Grass	31 min
Jun 16, 3:43 PM MDT	Severe Thunderstorm Warning	BYZ	Carbon, Stillwater	47 min
Jun 16, 4:20 PM MDT	Severe Thunderstorm Warning	BYZ	Big Horn, Carbon	40 min
Jun 16, 4:22 PM MDT	Severe Thunderstorm Warning	BYZ	Stillwater	38 min
Jun 16, 4:29 PM MDT	Severe Thunderstorm Warning Considerable damage threat	BYZ	Musselshell, Yellowstone	46 min
Jun 16, 4:38 PM MDT	Severe Thunderstorm Warning	BYZ	Big Horn, Carbon	46 min
Jun 16, 4:52 PM MDT	Severe Thunderstorm Warning	BYZ	Stillwater, Yellowstone	23 min
Jun 16, 4:59 PM MDT	Severe Thunderstorm Warning	BYZ	Big Horn, Carbon	46 min
Jun 16, 5:12 PM MDT	Severe Thunderstorm Warning Considerable damage threat	BYZ	Big Horn, Yellowstone	48 min
Jun 16, 5:15 PM MDT	Severe Thunderstorm Warning	BYZ	Yellowstone	30 min
Jun 16, 5:22 PM MDT	Severe Thunderstorm Warning	BYZ	Big Horn, Carbon	38 min
Jun 16, 5:49 PM MDT	Severe Thunderstorm Warning	BYZ	Big Horn	41 min
Jun 16, 5:57 PM MDT	Severe Thunderstorm Warning	BYZ	Big Horn, Yellowstone	37 min
Jun 16, 6:29 PM MDT	Severe Thunderstorm Warning	BYZ	Big Horn	46 min
Jun 16, 6:32 PM MDT	Severe Thunderstorm Warning	BYZ	Big Horn, Rosebud	43 min
Jun 18, 3:25 PM MDT	Severe Thunderstorm Warning	GGW	Sheridan	50 min
Jun 19, 3:48 PM MDT	Severe Thunderstorm Warning	TFX	Gallatin	27 min
Jun 19, 5:00 PM MDT	Severe Thunderstorm Warning	TFX	Beaverhead, Madison	30 min
Jun 19, 5:19 PM MDT	Severe Thunderstorm Warning	TFX	Broadwater	26 min
Jun 20, 3:23 PM MDT	Severe Thunderstorm Warning	TFX	Broadwater, Meagher	52 min
Jun 20, 3:41 PM MDT	Severe Thunderstorm Warning	BYZ	Custer	21 min
Jun 20, 3:45 PM MDT	Severe Thunderstorm Warning	BYZ	Custer	17 min
Jun 20, 3:48 PM MDT	Severe Thunderstorm Warning	GGW	Prairie	57 min
Jun 20, 3:59 PM MDT	Severe Thunderstorm Warning	GGW	Dawson, Prairie	61 min
Jun 20, 4:01 PM MDT	Severe Thunderstorm Warning	BYZ	Carter, Custer, Fallon, Powder River	59 min
Jun 20, 4:11 PM MDT	Severe Thunderstorm Warning	TFX	Judith Basin, Meagher	33 min
Jun 20, 4:41 PM MDT	Severe Thunderstorm Warning	BYZ	Wheatland	49 min
Jun 20, 4:52 PM MDT	Severe Thunderstorm Warning Considerable damage threat	BYZ	Carter, Fallon	53 min
Jun 20, 4:57 PM MDT	Severe Thunderstorm Warning	GGW	Dawson, Wibaux	39 min
Jun 24, 11:57 PM MDT	Severe Thunderstorm Warning	BYZ	Powder River	28 min
Jun 25, 2:31 PM MDT	Severe Thunderstorm Warning	GGW	Garfield, McCone	59 min
Jun 25, 3:44 PM MDT	Severe Thunderstorm Warning	GGW	Garfield, McCone	42 min
Jun 25, 3:55 PM MDT	Severe Thunderstorm Warning	GGW	Dawson, Prairie	65 min
Jun 25, 4:02 PM MDT	Severe Thunderstorm Warning	BYZ	Carter	58 min
Jun 25, 4:44 PM MDT	Severe Thunderstorm Warning	GGW	Dawson, Prairie, Wibaux	61 min
Jun 25, 4:57 PM MDT	Severe Thunderstorm Warning	BYZ	Carter, Fallon	63 min
Jun 26, 4:12 PM MDT	Severe Thunderstorm Warning	GGW	Daniels, Roosevelt, Sheridan	63 min
Jun 26, 5:55 PM MDT	Severe Thunderstorm Warning	GGW	Roosevelt, Sheridan	65 min
Jun 26, 6:34 PM MDT	Severe Thunderstorm Warning	GGW	Richland, Roosevelt	56 min
Jun 26, 6:43 PM MDT	Severe Thunderstorm Warning	BYZ	Carter	37 min
Jun 27, 1:05 PM MDT	Severe Thunderstorm Warning	TFX	Cascade, Chouteau	40 min
Jun 27, 4:18 PM MDT	Severe Thunderstorm Warning	GGW	Garfield, Petroleum, Phillips	57 min
Jun 27, 5:14 PM MDT	Severe Thunderstorm Warning	GGW	Garfield, Petroleum, Phillips	61 min
Jun 27, 5:45 PM MDT	Severe Thunderstorm Warning	GGW	Garfield, McCone, Phillips, Valley	60 min
Jun 27, 6:14 PM MDT	Severe Thunderstorm Warning	GGW	Garfield, McCone, Phillips, Valley	61 min
Jun 28, 2:23 PM MDT	Severe Thunderstorm Warning	BYZ	Carter	52 min
Jun 28, 7:36 PM MDT	Severe Thunderstorm Warning	BYZ	Big Horn, Rosebud	54 min
Jun 28, 8:29 PM MDT	Severe Thunderstorm Warning	BYZ	Big Horn, Powder River, Rosebud	61 min
Jun 28, 9:29 PM MDT	Severe Thunderstorm Warning	BYZ	Carter, Powder River	76 min
Jun 28, 11:05 PM MDT	Severe Thunderstorm Warning	BYZ	Carter	40 min
Jul 1, 2:18 PM MDT	Severe Thunderstorm Warning	TFX	Beaverhead	27 min
Jul 1, 3:43 PM MDT	Severe Thunderstorm Warning	TFX	Madison	32 min
Jul 1, 4:24 PM MDT	Severe Thunderstorm Warning	BYZ	Carter	51 min
Jul 1, 5:38 PM MDT	Severe Thunderstorm Warning	TFX	Gallatin	37 min
Jul 1, 5:57 PM MDT	Severe Thunderstorm Warning	TFX	Broadwater	48 min
Jul 2, 2:16 PM MDT	Severe Thunderstorm Warning	TFX	Beaverhead, Madison	44 min
Jul 2, 3:56 PM MDT	Severe Thunderstorm Warning	MSO	Ravalli	34 min
Jul 2, 6:45 PM MDT	Severe Thunderstorm Warning	GGW	Garfield, Petroleum, Phillips	60 min
Jul 2, 7:36 PM MDT	Severe Thunderstorm Warning	GGW	Garfield, Phillips, Valley	54 min
Jul 2, 8:09 PM MDT	Severe Thunderstorm Warning Considerable damage threat	GGW	Garfield, McCone, Phillips, Valley	66 min
Jul 2, 8:52 PM MDT	Severe Thunderstorm Warning	GGW	Dawson, McCone, Richland	53 min
Jul 2, 9:08 PM MDT	Severe Thunderstorm Warning	GGW	Daniels, Valley	38 min
Jul 3, 9:52 PM MDT	Severe Thunderstorm Warning Considerable damage threat	BYZ	Fallon	23 min
Jul 5, 1:23 PM MDT	Severe Thunderstorm Warning	TFX	Blaine, Fergus	52 min
Jul 5, 1:50 PM MDT	Severe Thunderstorm Warning	BYZ	Big Horn, Yellowstone	40 min
Jul 5, 2:20 PM MDT	Severe Thunderstorm Warning	BYZ	Big Horn	55 min
Jul 5, 2:31 PM MDT	Severe Thunderstorm Warning	BYZ	Big Horn, Musselshell, Rosebud, Treasure, Yellowstone	59 min
Jul 5, 2:57 PM MDT	Severe Thunderstorm Warning	GGW	Garfield, Petroleum	63 min
Jul 5, 3:13 PM MDT	Severe Thunderstorm Warning Considerable damage threat	BYZ	Big Horn, Rosebud, Treasure	62 min
Jul 5, 3:30 PM MDT	Severe Thunderstorm Warning Considerable damage threat	BYZ	Rosebud, Treasure	45 min
Jul 5, 4:11 PM MDT	Severe Thunderstorm Warning	BYZ	Big Horn, Custer, Powder River, Rosebud	64 min
Jul 5, 4:13 PM MDT	Severe Thunderstorm Warning	BYZ	Big Horn, Rosebud, Treasure	19 min
Jul 5, 4:15 PM MDT	Severe Thunderstorm Warning	BYZ	Custer, Rosebud	60 min
Jul 5, 5:16 PM MDT	Severe Thunderstorm Warning	BYZ	Carter, Custer, Powder River	59 min
Jul 5, 6:13 PM MDT	Severe Thunderstorm Warning	BYZ	Carter, Powder River	62 min
Jul 5, 7:14 PM MDT	Severe Thunderstorm Warning	BYZ	Carter	28 min
Jul 5, 7:51 PM MDT	Severe Thunderstorm Warning	GGW	Garfield, Petroleum, Phillips	54 min
Jul 5, 7:57 PM MDT	Severe Thunderstorm Warning	TFX	Fergus	33 min
Jul 6, 8:58 PM MDT	Severe Thunderstorm Warning	GGW	Sheridan	62 min
Jul 9, 5:25 PM MDT	Severe Thunderstorm Warning	TFX	Cascade, Fergus, Judith Basin	50 min
Jul 13, 10:04 PM MDT	Severe Thunderstorm Warning	TFX	Liberty, Toole	41 min
Jul 13, 10:58 PM MDT	Severe Thunderstorm Warning	TFX	Hill, Liberty	62 min
Jul 13, 11:56 PM MDT	Severe Thunderstorm Warning	TFX	Blaine, Hill	64 min
Jul 17, 3:39 PM MDT	Severe Thunderstorm Warning	TFX	Hill	51 min
Jul 17, 3:48 PM MDT	Severe Thunderstorm Warning	TFX	Pondera, Teton	57 min
Jul 17, 4:05 PM MDT	Severe Thunderstorm Warning	TFX	Blaine	55 min
Jul 17, 4:29 PM MDT	Severe Thunderstorm Warning	TFX	Hill, Liberty	25 min
Jul 17, 4:34 PM MDT	Severe Thunderstorm Warning Considerable damage threat	TFX	Chouteau, Pondera, Teton	56 min
Jul 17, 4:53 PM MDT	Severe Thunderstorm Warning Considerable damage threat	TFX	Blaine	46 min
Jul 17, 5:38 PM MDT	Severe Thunderstorm Warning Considerable damage threat	TFX	Blaine	44 min
Jul 17, 5:47 PM MDT	Severe Thunderstorm Warning Considerable damage threat	GGW	Phillips	58 min
Jul 17, 6:19 PM MDT	Severe Thunderstorm Warning	TFX	Chouteau, Fergus	56 min
Jul 17, 6:42 PM MDT	Severe Thunderstorm Warning	GGW	Garfield, Petroleum, Phillips	63 min
Jul 17, 7:09 PM MDT	Severe Thunderstorm Warning	TFX	Fergus	51 min
Jul 17, 7:42 PM MDT	Severe Thunderstorm Warning Considerable damage threat	GGW	Garfield, Phillips, Valley	63 min
Jul 17, 7:47 PM MDT	Severe Thunderstorm Warning	GGW	Garfield, Petroleum	58 min
Jul 17, 8:42 PM MDT	Severe Thunderstorm Warning	GGW	Garfield, Petroleum	33 min
Jul 17, 8:45 PM MDT	Severe Thunderstorm Warning	GGW	Garfield, Prairie	60 min
Jul 17, 8:56 PM MDT	Severe Thunderstorm Warning Considerable damage threat	BYZ	Musselshell, Rosebud	45 min
Jul 17, 9:32 PM MDT	Severe Thunderstorm Warning	GGW	Garfield, McCone, Valley	58 min
Jul 17, 9:44 PM MDT	Severe Thunderstorm Warning	GGW	Garfield, McCone, Prairie	30 min
Jul 19, 6:50 AM MDT	Severe Thunderstorm Warning	GGW	Dawson, McCone	55 min
Jul 19, 4:24 PM MDT	Severe Thunderstorm Warning	BYZ	Carter, Powder River	66 min
Jul 19, 4:40 PM MDT	Severe Thunderstorm Warning	GGW	Dawson, McCone, Prairie	65 min
Jul 19, 5:03 PM MDT	Severe Thunderstorm Warning	BYZ	Carter	27 min
Jul 19, 5:29 PM MDT	Severe Thunderstorm Warning	BYZ	Carter, Powder River	61 min
Jul 19, 5:43 PM MDT	Severe Thunderstorm Warning Considerable damage threat	GGW	Dawson, McCone, Prairie	62 min
Jul 19, 5:44 PM MDT	Severe Thunderstorm Warning	GGW	Prairie	61 min
Jul 19, 5:50 PM MDT	Severe Thunderstorm Warning Considerable damage threat	BYZ	Custer	40 min
Jul 19, 6:30 PM MDT	Severe Thunderstorm Warning Considerable damage threat	BYZ	Custer, Fallon	60 min
Jul 19, 6:44 PM MDT	Severe Thunderstorm Warning Considerable damage threat	GGW	Dawson, Prairie, Wibaux	61 min
Jul 19, 7:00 PM MDT	Severe Thunderstorm Warning	GGW	Daniels, Valley	60 min
Jul 19, 7:22 PM MDT	Severe Thunderstorm Warning Considerable damage threat	BYZ	Fallon	53 min
Jul 19, 7:30 PM MDT	Severe Thunderstorm Warning	GGW	Daniels, Valley	60 min
Jul 19, 7:59 PM MDT	Severe Thunderstorm Warning	BYZ	Custer, Fallon	46 min
Jul 19, 8:12 PM MDT	Severe Thunderstorm Warning	BYZ	Carter, Fallon	63 min
Jul 19, 9:14 PM MDT	Severe Thunderstorm Warning	BYZ	Carter, Fallon	44 min
Jul 20, 3:48 PM MDT	Severe Thunderstorm Warning Considerable damage threat	GGW	Garfield, McCone, Prairie	57 min
Jul 20, 5:22 PM MDT	Severe Thunderstorm Warning	GGW	Prairie	53 min
Jul 20, 5:26 PM MDT	Severe Thunderstorm Warning	BYZ	Custer	38 min
Jul 20, 6:08 PM MDT	Severe Thunderstorm Warning Considerable damage threat	BYZ	Custer	24 min
Jul 20, 6:10 PM MDT	Severe Thunderstorm Warning Destructive damage threat	GGW	Prairie, Wibaux	65 min
Jul 20, 6:22 PM MDT	Severe Thunderstorm Warning Considerable damage threat	BYZ	Big Horn	31 min
Jul 20, 6:31 PM MDT	Severe Thunderstorm Warning Considerable damage threat	BYZ	Carter, Custer, Fallon	48 min
Jul 20, 6:37 PM MDT	Severe Thunderstorm Warning	BYZ	Big Horn, Rosebud	38 min
Jul 20, 6:42 PM MDT	Severe Thunderstorm Warning	GGW	Wibaux	52 min
Jul 20, 6:48 PM MDT	Severe Thunderstorm Warning	BYZ	Big Horn	42 min
Jul 20, 7:17 PM MDT	Severe Thunderstorm Warning Considerable damage threat	BYZ	Carter, Custer, Fallon	58 min
Jul 20, 7:28 PM MDT	Severe Thunderstorm Warning	BYZ	Rosebud	47 min
Jul 20, 8:12 PM MDT	Severe Thunderstorm Warning Considerable damage threat	BYZ	Carter, Fallon	33 min
Jul 20, 8:14 PM MDT	Severe Thunderstorm Warning	BYZ	Powder River	46 min
Jul 20, 8:42 PM MDT	Severe Thunderstorm Warning	BYZ	Carter	33 min
Jul 20, 8:54 PM MDT	Severe Thunderstorm Warning	BYZ	Powder River	51 min
Jul 20, 9:51 PM MDT	Severe Thunderstorm Warning	BYZ	Carter, Fallon	54 min
Jul 21, 2:54 PM MDT	Severe Thunderstorm Warning	BYZ	Big Horn, Powder River	37 min
Jul 21, 4:00 PM MDT	Severe Thunderstorm Warning	BYZ	Big Horn, Rosebud	60 min
Jul 21, 4:06 PM MDT	Severe Thunderstorm Warning	TFX	Meagher	39 min
Jul 21, 4:15 PM MDT	Severe Thunderstorm Warning	BYZ	Powder River	45 min
Jul 21, 4:18 PM MDT	Severe Thunderstorm Warning	BYZ	Big Horn	39 min
Jul 21, 4:32 PM MDT	Severe Thunderstorm Warning Considerable damage threat	BYZ	Big Horn, Custer, Powder River, Rosebud, Treasure	58 min
Jul 21, 4:44 PM MDT	Severe Thunderstorm Warning	TFX	Judith Basin, Meagher	46 min
Jul 21, 4:56 PM MDT	Severe Thunderstorm Warning	BYZ	Wheatland	41 min
Jul 21, 5:17 PM MDT	Severe Thunderstorm Warning	TFX	Broadwater, Jefferson, Lewis and Clark	43 min
Jul 21, 5:28 PM MDT	Severe Thunderstorm Warning	BYZ	Custer, Powder River, Rosebud	62 min
Jul 21, 5:34 PM MDT	Severe Thunderstorm Warning Considerable damage threat	BYZ	Golden Valley, Wheatland	41 min
Jul 21, 6:24 PM MDT	Severe Thunderstorm Warning Considerable damage threat	BYZ	Custer, Rosebud	66 min
Jul 21, 6:48 PM MDT	Severe Thunderstorm Warning	GGW	Dawson, Prairie	57 min
Jul 21, 6:59 PM MDT	Severe Thunderstorm Warning	BYZ	Wheatland	46 min
Jul 21, 7:44 PM MDT	Severe Thunderstorm Warning Considerable damage threat	BYZ	Wheatland	46 min
Jul 21, 8:25 PM MDT	Severe Thunderstorm Warning Considerable damage threat	BYZ	Golden Valley, Wheatland	50 min
Jul 21, 9:13 PM MDT	Severe Thunderstorm Warning	BYZ	Golden Valley, Musselshell	47 min
Jul 21, 9:41 PM MDT	Severe Thunderstorm Warning	BYZ	Golden Valley, Musselshell	42 min
Jul 21, 9:58 PM MDT	Severe Thunderstorm Warning Considerable damage threat	BYZ	Musselshell	49 min
Jul 21, 10:03 PM MDT	Severe Thunderstorm Warning	BYZ	Yellowstone	57 min
Jul 21, 10:59 PM MDT	Severe Thunderstorm Warning	BYZ	Treasure, Yellowstone	38 min
Jul 23, 2:27 PM MDT	Severe Thunderstorm Warning	BYZ	Yellowstone	48 min
Jul 23, 3:09 PM MDT	Severe Thunderstorm Warning	BYZ	Powder River	66 min
Jul 23, 3:15 PM MDT	Severe Thunderstorm Warning	BYZ	Yellowstone	19 min
Jul 25, 2:01 PM MDT	Severe Thunderstorm Warning	TFX	Beaverhead	28 min
Jul 25, 3:23 PM MDT	Severe Thunderstorm Warning	TFX	Beaverhead	37 min
Jul 25, 4:31 PM MDT	Severe Thunderstorm Warning	GGW	Prairie	59 min
Jul 25, 4:33 PM MDT	Severe Thunderstorm Warning	BYZ	Custer	26 min
Jul 25, 5:21 PM MDT	Severe Thunderstorm Warning	GGW	Prairie	54 min
Jul 25, 5:52 PM MDT	Severe Thunderstorm Warning	BYZ	Custer, Fallon	53 min
Jul 25, 6:38 PM MDT	Severe Thunderstorm Warning	BYZ	Fallon	37 min
Jul 26, 4:44 PM MDT	Severe Thunderstorm Warning	TFX	Chouteau, Hill, Liberty, Toole	33 min
Jul 26, 5:13 PM MDT	Severe Thunderstorm Warning	TFX	Judith Basin	47 min
Jul 26, 5:18 PM MDT	Severe Thunderstorm Warning	BYZ	Golden Valley, Musselshell, Wheatland	42 min
Jul 26, 5:23 PM MDT	Severe Thunderstorm Warning	GGW	Phillips, Valley	52 min
Jul 26, 5:56 PM MDT	Severe Thunderstorm Warning	BYZ	Golden Valley, Musselshell	64 min
Jul 26, 5:59 PM MDT	Severe Thunderstorm Warning	GGW	Valley	61 min
Jul 26, 6:44 PM MDT	Severe Thunderstorm Warning	GGW	Phillips	61 min
Jul 26, 6:49 PM MDT	Severe Thunderstorm Warning	GGW	McCone, Roosevelt, Valley	56 min
Jul 26, 6:59 PM MDT	Severe Thunderstorm Warning	GGW	Garfield, Petroleum, Phillips	61 min
Jul 26, 7:13 PM MDT	Severe Thunderstorm Warning	TFX	Blaine	47 min
Jul 26, 7:17 PM MDT	Severe Thunderstorm Warning	GGW	Phillips	43 min
Jul 26, 7:41 PM MDT	Severe Thunderstorm Warning	BYZ	Carter	49 min
Jul 26, 7:53 PM MDT	Severe Thunderstorm Warning	GGW	Phillips	67 min
Jul 26, 7:59 PM MDT	Severe Thunderstorm Warning	GGW	Garfield, Petroleum, Phillips	61 min
Jul 26, 8:13 PM MDT	Severe Thunderstorm Warning	BYZ	Carter	28 min
Jul 26, 8:17 PM MDT	Severe Thunderstorm Warning	TFX	Blaine	23 min
Jul 26, 8:36 PM MDT	Severe Thunderstorm Warning Considerable damage threat	GGW	Garfield, McCone, Phillips, Valley	54 min
Jul 26, 9:08 PM MDT	Severe Thunderstorm Warning	GGW	Phillips, Valley	37 min
Jul 26, 9:15 PM MDT	Severe Thunderstorm Warning	MSO	Missoula, Ravalli	30 min
Jul 26, 9:23 PM MDT	Severe Thunderstorm Warning Considerable damage threat	GGW	Daniels, Garfield, McCone, Phillips, Prairie, Roosevelt and 1 more	52 min
Jul 26, 9:41 PM MDT	Severe Thunderstorm Warning Considerable damage threat	TFX	Hill	46 min
Jul 26, 9:46 PM MDT	Severe Thunderstorm Warning	MSO	Lake, Missoula	29 min
Jul 26, 10:54 PM MDT	Severe Thunderstorm Warning	GGW	Dawson, Garfield, McCone, Prairie, Richland, Roosevelt and 2 more	81 min
Jul 27, 12:11 AM MDT	Severe Thunderstorm Warning	GGW	Daniels, Richland, Roosevelt, Sheridan	64 min
Jul 27, 7:07 PM MDT	Severe Thunderstorm Warning	TFX	Glacier, Toole	38 min
Jul 27, 7:57 PM MDT	Severe Thunderstorm Warning	BYZ	Wheatland	37 min
Jul 27, 8:10 PM MDT	Severe Thunderstorm Warning	TFX	Hill, Liberty, Toole	65 min
Jul 27, 9:14 PM MDT	Severe Thunderstorm Warning	TFX	Hill, Liberty	61 min
Jul 28, 1:09 AM MDT	Severe Thunderstorm Warning	GGW	Phillips, Valley	66 min
Jul 28, 3:31 AM MDT	Severe Thunderstorm Warning	GGW	Dawson, Richland	59 min
Jul 28, 4:11 AM MDT	Severe Thunderstorm Warning Considerable damage threat	GGW	Dawson, Richland, Wibaux	64 min
Jul 28, 8:13 AM MDT	Severe Thunderstorm Warning	GGW	Dawson, Prairie, Wibaux	62 min
Jul 28, 8:22 AM MDT	Severe Thunderstorm Warning	BYZ	Custer, Fallon	53 min
Jul 28, 9:13 AM MDT	Severe Thunderstorm Warning	BYZ	Fallon	62 min
Jul 28, 2:13 PM MDT	Severe Thunderstorm Warning	TFX	Lewis and Clark, Teton	62 min
Jul 28, 2:39 PM MDT	Severe Thunderstorm Warning	TFX	Broadwater, Jefferson, Lewis and Clark	36 min
Jul 28, 2:43 PM MDT	Severe Thunderstorm Warning	TFX	Fergus, Judith Basin	47 min
Jul 28, 3:05 PM MDT	Severe Thunderstorm Warning	TFX	Fergus, Judith Basin	19 min
Jul 28, 3:11 PM MDT	Severe Thunderstorm Warning	TFX	Broadwater, Meagher	29 min
Jul 28, 3:12 PM MDT	Severe Thunderstorm Warning	TFX	Cascade, Lewis and Clark, Teton	63 min
Jul 28, 3:51 PM MDT	Severe Thunderstorm Warning	TFX	Cascade, Judith Basin, Meagher	54 min
Jul 28, 3:56 PM MDT	Severe Thunderstorm Warning	TFX	Fergus	64 min
Jul 28, 4:03 PM MDT	Severe Thunderstorm Warning	TFX	Cascade, Meagher	42 min
Jul 28, 4:09 PM MDT	Severe Thunderstorm Warning	TFX	Judith Basin	51 min
Jul 28, 4:18 PM MDT	Severe Thunderstorm Warning	TFX	Meagher	29 min
Jul 28, 4:38 PM MDT	Severe Thunderstorm Warning Considerable damage threat	TFX	Cascade, Judith Basin	52 min
Jul 28, 4:38 PM MDT	Severe Thunderstorm Warning	TFX	Judith Basin, Meagher	26 min
Jul 28, 4:51 PM MDT	Severe Thunderstorm Warning	TFX	Fergus, Judith Basin	54 min
Jul 28, 5:09 PM MDT	Severe Thunderstorm Warning	TFX	Chouteau, Fergus	51 min
Jul 28, 5:15 PM MDT	Severe Thunderstorm Warning	TFX	Fergus	60 min
Jul 28, 5:48 PM MDT	Severe Thunderstorm Warning	TFX	Fergus	42 min
Jul 28, 5:53 PM MDT	Severe Thunderstorm Warning	BYZ	Golden Valley, Musselshell	52 min
Jul 28, 6:44 PM MDT	Severe Thunderstorm Warning Considerable damage threat	BYZ	Golden Valley, Musselshell	46 min
Jul 28, 7:29 PM MDT	Severe Thunderstorm Warning Considerable damage threat	BYZ	Musselshell	44 min
Jul 28, 8:14 PM MDT	Severe Thunderstorm Warning	BYZ	Rosebud	46 min
Jul 28, 9:20 PM MDT	Severe Thunderstorm Warning	BYZ	Yellowstone	25 min
Jul 28, 9:26 PM MDT	Severe Thunderstorm Warning	BYZ	Stillwater, Yellowstone	32 min
Jul 28, 9:39 PM MDT	Severe Thunderstorm Warning Considerable damage threat	BYZ	Custer	45 min
Jul 28, 9:41 PM MDT	Severe Thunderstorm Warning Considerable damage threat	GGW	Dawson, McCone, Prairie	64 min
Jul 28, 9:44 PM MDT	Severe Thunderstorm Warning	BYZ	Yellowstone	37 min
Jul 28, 9:57 PM MDT	Severe Thunderstorm Warning	BYZ	Yellowstone	24 min
Jul 28, 10:06 PM MDT	Severe Thunderstorm Warning	GGW	Dawson, McCone, Prairie	39 min
Jul 28, 10:20 PM MDT	Severe Thunderstorm Warning	BYZ	Big Horn, Yellowstone	55 min
Jul 28, 10:22 PM MDT	Severe Thunderstorm Warning	BYZ	Carbon	38 min
Jul 28, 10:38 PM MDT	Severe Thunderstorm Warning Considerable damage threat	GGW	Dawson, McCone, Prairie, Richland, Wibaux	67 min
Jul 28, 10:54 PM MDT	Severe Thunderstorm Warning	BYZ	Carbon, Yellowstone	19 min
Jul 28, 11:14 PM MDT	Severe Thunderstorm Warning Considerable damage threat	BYZ	Big Horn, Yellowstone	55 min
Jul 28, 11:48 PM MDT	Severe Thunderstorm Warning	BYZ	Fallon	29 min
Jul 29, 12:08 AM MDT	Severe Thunderstorm Warning	BYZ	Big Horn, Treasure	52 min
Jul 29, 12:56 AM MDT	Severe Thunderstorm Warning	BYZ	Big Horn, Rosebud, Treasure	52 min
Jul 29, 1:49 PM MDT	Severe Thunderstorm Warning	TFX	Fergus	56 min
Jul 29, 2:17 PM MDT	Severe Thunderstorm Warning	BYZ	Rosebud	52 min
Jul 29, 2:20 PM MDT	Severe Thunderstorm Warning	GGW	Garfield	55 min
Jul 29, 2:38 PM MDT	Severe Thunderstorm Warning	BYZ	Rosebud	37 min
Jul 29, 3:08 PM MDT	Severe Thunderstorm Warning	BYZ	Custer, Rosebud	67 min
Jul 29, 3:31 PM MDT	Severe Thunderstorm Warning	GGW	Garfield, Prairie	59 min
Jul 29, 4:17 PM MDT	Severe Thunderstorm Warning	BYZ	Custer	49 min
Jul 29, 4:22 PM MDT	Severe Thunderstorm Warning	TFX	Madison	26 min
Jul 29, 4:26 PM MDT	Severe Thunderstorm Warning	BYZ	Park	49 min
Jul 29, 4:34 PM MDT	Severe Thunderstorm Warning	BYZ	Custer, Rosebud	41 min
Jul 29, 4:35 PM MDT	Severe Thunderstorm Warning	BYZ	Wheatland	24 min
Jul 29, 4:42 PM MDT	Severe Thunderstorm Warning	TFX	Blaine	52 min
Jul 29, 4:51 PM MDT	Severe Thunderstorm Warning	TFX	Blaine, Fergus	54 min
Jul 29, 4:52 PM MDT	Severe Thunderstorm Warning	BYZ	Golden Valley, Sweet Grass	53 min
Jul 29, 5:06 PM MDT	Severe Thunderstorm Warning Destructive damage threat	BYZ	Custer	54 min
Jul 29, 5:06 PM MDT	Severe Thunderstorm Warning	BYZ	Park	39 min
Jul 29, 5:11 PM MDT	Severe Thunderstorm Warning	BYZ	Custer, Rosebud	32 min
Jul 29, 5:13 PM MDT	Severe Thunderstorm Warning	BYZ	Custer	55 min
Jul 29, 5:27 PM MDT	Severe Thunderstorm Warning	BYZ	Stillwater, Sweet Grass	22 min
Jul 29, 5:40 PM MDT	Severe Thunderstorm Warning	BYZ	Big Horn, Rosebud	25 min
Jul 29, 5:54 PM MDT	Severe Thunderstorm Warning Considerable damage threat	BYZ	Carter, Custer, Powder River	66 min
Jul 29, 6:50 PM MDT	Severe Thunderstorm Warning Considerable damage threat	BYZ	Carter	55 min
Jul 29, 7:09 PM MDT	Severe Thunderstorm Warning	TFX	Gallatin	36 min
Jul 29, 7:36 PM MDT	Severe Thunderstorm Warning	BYZ	Carter, Powder River	39 min
Jul 29, 7:39 PM MDT	Severe Thunderstorm Warning Considerable damage threat	BYZ	Carter	66 min
Jul 29, 8:05 PM MDT	Severe Thunderstorm Warning	BYZ	Carter, Powder River	24 min
Jul 29, 8:37 PM MDT	Severe Thunderstorm Warning Considerable damage threat	BYZ	Carter	39 min
Jul 29, 9:00 PM MDT	Severe Thunderstorm Warning	BYZ	Big Horn	30 min
Jul 31, 3:57 PM MDT	Severe Thunderstorm Warning	BYZ	Park, Sweet Grass	52 min
Jul 31, 5:28 PM MDT	Severe Thunderstorm Warning	MSO	Granite, Missoula, Powell	32 min
Jul 31, 7:22 PM MDT	Severe Thunderstorm Warning	TFX	Broadwater, Jefferson, Lewis and Clark, Meagher	53 min
Jul 31, 8:10 PM MDT	Severe Thunderstorm Warning	GGW	Garfield	65 min
Jul 31, 8:38 PM MDT	Severe Thunderstorm Warning	BYZ	Powder River	42 min
Jul 31, 9:03 PM MDT	Severe Thunderstorm Warning	TFX	Cascade	42 min
Aug 1, 2:31 PM MDT	Severe Thunderstorm Warning	TFX	Judith Basin	44 min
Aug 1, 3:42 PM MDT	Severe Thunderstorm Warning	TFX	Fergus, Judith Basin	35 min
Aug 1, 5:10 PM MDT	Severe Thunderstorm Warning	TFX	Fergus, Judith Basin	35 min
Aug 1, 8:04 PM MDT	Severe Thunderstorm Warning	TFX	Chouteau, Hill, Liberty	26 min
Aug 1, 9:34 PM MDT	Severe Thunderstorm Warning	TFX	Blaine	26 min
Aug 1, 9:39 PM MDT	Severe Thunderstorm Warning	GGW	Phillips	66 min
Aug 1, 9:56 PM MDT	Severe Thunderstorm Warning	TFX	Blaine	34 min
Aug 4, 3:40 PM MDT	Severe Thunderstorm Warning	MSO	Granite	50 min
Aug 4, 3:54 PM MDT	Severe Thunderstorm Warning	MSO	Deer Lodge, Granite	36 min
Aug 4, 4:41 PM MDT	Severe Thunderstorm Warning	GGW	Garfield	64 min
Aug 4, 4:49 PM MDT	Severe Thunderstorm Warning	TFX	Broadwater, Jefferson, Lewis and Clark	26 min
Aug 4, 5:40 PM MDT	Severe Thunderstorm Warning	GGW	Garfield	36 min
Aug 4, 5:45 PM MDT	Severe Thunderstorm Warning Considerable damage threat	BYZ	Rosebud	60 min
Aug 4, 6:19 PM MDT	Severe Thunderstorm Warning	TFX	Chouteau, Fergus, Judith Basin	26 min
Aug 4, 6:41 PM MDT	Severe Thunderstorm Warning	TFX	Chouteau	36 min
Aug 4, 6:44 PM MDT	Severe Thunderstorm Warning Considerable damage threat	BYZ	Rosebud	61 min
Aug 4, 6:50 PM MDT	Severe Thunderstorm Warning	TFX	Blaine, Hill	40 min
Aug 4, 6:56 PM MDT	Severe Thunderstorm Warning	TFX	Cascade	34 min
Aug 4, 7:14 PM MDT	Severe Thunderstorm Warning	TFX	Hill	46 min
Aug 4, 7:24 PM MDT	Severe Thunderstorm Warning	TFX	Blaine, Hill	51 min
Aug 4, 7:45 PM MDT	Severe Thunderstorm Warning	BYZ	Rosebud	32 min
Aug 5, 1:53 AM MDT	Severe Thunderstorm Warning	BYZ	Carter, Powder River	67 min
Aug 5, 2:58 AM MDT	Severe Thunderstorm Warning Considerable damage threat	BYZ	Carter	41 min
Aug 5, 3:22 AM MDT	Severe Thunderstorm Warning Considerable damage threat	BYZ	Carter	38 min
Aug 5, 5:11 AM MDT	Severe Thunderstorm Warning	TFX	Fergus	54 min
Aug 5, 5:26 AM MDT	Severe Thunderstorm Warning	GGW	Petroleum	54 min
Aug 5, 5:55 PM MDT	Severe Thunderstorm Warning	GGW	Daniels, Roosevelt, Valley	65 min
Aug 7, 3:06 AM MDT	Severe Thunderstorm Warning	TFX	Fergus	69 min
Aug 7, 4:14 AM MDT	Severe Thunderstorm Warning	GGW	Garfield, Petroleum, Phillips	43 min
Aug 7, 6:16 AM MDT	Severe Thunderstorm Warning	GGW	Dawson	59 min
Aug 7, 6:42 AM MDT	Severe Thunderstorm Warning	GGW	Dawson, McCone, Prairie	63 min
Aug 7, 7:40 AM MDT	Severe Thunderstorm Warning	GGW	Dawson, Prairie, Richland, Wibaux	65 min
Aug 7, 3:27 PM MDT	Severe Thunderstorm Warning	TFX	Fergus	18 min
Aug 7, 3:28 PM MDT	Severe Thunderstorm Warning	GGW	Garfield, Petroleum	62 min
Aug 7, 4:29 PM MDT	Severe Thunderstorm Warning	GGW	Garfield, Petroleum	61 min
Aug 7, 5:04 PM MDT	Severe Thunderstorm Warning Considerable damage threat	BYZ	Stillwater, Yellowstone	46 min
Aug 7, 5:43 PM MDT	Severe Thunderstorm Warning	GGW	McCone, Valley	62 min
Aug 7, 5:50 PM MDT	Severe Thunderstorm Warning Considerable damage threat	BYZ	Big Horn, Yellowstone	26 min
Aug 7, 6:16 PM MDT	Severe Thunderstorm Warning Considerable damage threat	BYZ	Big Horn, Treasure, Yellowstone	53 min
Aug 7, 6:24 PM MDT	Severe Thunderstorm Warning	GGW	Dawson, McCone, Richland	66 min
Aug 7, 6:29 PM MDT	Severe Thunderstorm Warning	BYZ	Musselshell, Rosebud, Treasure, Yellowstone	40 min
Aug 7, 6:42 PM MDT	Severe Thunderstorm Warning	GGW	McCone, Richland, Roosevelt, Valley	63 min
Aug 7, 7:08 PM MDT	Severe Thunderstorm Warning Considerable damage threat	BYZ	Rosebud, Treasure	47 min
Aug 7, 7:30 PM MDT	Severe Thunderstorm Warning	GGW	Dawson, McCone, Richland, Roosevelt, Wibaux	60 min
Aug 7, 7:43 PM MDT	Severe Thunderstorm Warning	GGW	Daniels, Richland, Roosevelt, Sheridan	47 min
Aug 7, 7:54 PM MDT	Severe Thunderstorm Warning Considerable damage threat	BYZ	Custer, Rosebud	67 min
Aug 7, 8:26 PM MDT	Severe Thunderstorm Warning Considerable damage threat	GGW	Dawson, Garfield, McCone, Prairie, Wibaux	64 min
Aug 7, 9:00 PM MDT	Severe Thunderstorm Warning Considerable damage threat	BYZ	Custer, Fallon	75 min
Aug 7, 9:19 PM MDT	Severe Thunderstorm Warning	BYZ	Custer	21 min
Aug 7, 9:28 PM MDT	Severe Thunderstorm Warning Considerable damage threat	BYZ	Carter, Fallon	47 min
Aug 7, 10:10 PM MDT	Severe Thunderstorm Warning Considerable damage threat	BYZ	Carter, Fallon	22 min
Aug 16, 6:46 PM MDT	Severe Thunderstorm Warning	TFX	Blaine, Hill	44 min
Aug 17, 5:17 PM MDT	Severe Thunderstorm Warning	TFX	Fergus	88 min
Aug 17, 6:06 PM MDT	Severe Thunderstorm Warning	GGW	Petroleum, Phillips	54 min
Aug 17, 6:59 PM MDT	Severe Thunderstorm Warning	GGW	Garfield, Petroleum, Phillips	61 min
Aug 17, 8:48 PM MDT	Severe Thunderstorm Warning	BYZ	Powder River	42 min
Aug 17, 10:11 PM MDT	Severe Thunderstorm Warning	BYZ	Custer	49 min
Aug 18, 8:07 PM MDT	Severe Thunderstorm Warning	TFX	Cascade, Chouteau, Teton	38 min
Aug 19, 9:50 PM MDT	Severe Thunderstorm Warning	TFX	Cascade, Chouteau, Lewis and Clark, Teton	55 min
Aug 19, 10:43 PM MDT	Severe Thunderstorm Warning	TFX	Cascade, Chouteau, Teton	50 min
Aug 19, 11:02 PM MDT	Severe Thunderstorm Warning Considerable damage threat	TFX	Chouteau, Liberty, Pondera, Teton, Toole	88 min
Aug 19, 11:28 PM MDT	Severe Thunderstorm Warning	TFX	Hill, Liberty, Toole	92 min
Aug 20, 12:26 AM MDT	Severe Thunderstorm Warning	TFX	Chouteau, Hill, Liberty	79 min
Aug 20, 2:44 PM MDT	Severe Thunderstorm Warning	TFX	Pondera, Toole	46 min
Aug 20, 3:08 PM MDT	Severe Thunderstorm Warning	TFX	Pondera, Toole	52 min
Aug 20, 3:23 PM MDT	Severe Thunderstorm Warning	TFX	Liberty, Toole	52 min
Aug 20, 3:25 PM MDT	Severe Thunderstorm Warning	TFX	Pondera	35 min
Aug 20, 3:55 PM MDT	Severe Thunderstorm Warning	TFX	Liberty, Pondera, Toole	50 min
Aug 20, 4:13 PM MDT	Severe Thunderstorm Warning	TFX	Hill, Liberty	62 min
Aug 20, 5:09 PM MDT	Severe Thunderstorm Warning	TFX	Chouteau, Hill	47 min
Aug 20, 5:11 PM MDT	Severe Thunderstorm Warning	TFX	Chouteau, Fergus	64 min
Aug 20, 5:44 PM MDT	Severe Thunderstorm Warning Destructive damage threat	TFX	Blaine, Hill	76 min
Aug 20, 6:09 PM MDT	Severe Thunderstorm Warning	TFX	Fergus	81 min
Aug 20, 7:13 PM MDT	Severe Thunderstorm Warning	GGW	Garfield, Petroleum, Phillips	62 min
Aug 20, 8:09 PM MDT	Severe Thunderstorm Warning	GGW	Garfield, Petroleum, Phillips	25 min
Aug 21, 3:50 AM MDT	Severe Thunderstorm Warning	GGW	Dawson, McCone, Prairie	55 min
Aug 21, 4:39 AM MDT	Severe Thunderstorm Warning	GGW	Dawson, Richland, Wibaux	51 min
Sep 10, 8:37 PM MDT	Severe Thunderstorm Warning	BYZ	Carter, Powder River	38 min
Sep 11, 4:49 PM MDT	Severe Thunderstorm Warning	GGW	Daniels, Valley	56 min
Sep 12, 3:37 PM MDT	Severe Thunderstorm Warning	TFX	Blaine	35 min
Sep 12, 5:57 PM MDT	Severe Thunderstorm Warning	GGW	Phillips	43 min
Sep 14, 7:00 PM MDT	Severe Thunderstorm Warning	TFX	Lewis and Clark	60 min
Sep 14, 7:32 PM MDT	Severe Thunderstorm Warning	TFX	Broadwater, Jefferson, Lewis and Clark	43 min
Sep 14, 7:53 PM MDT	Severe Thunderstorm Warning	TFX	Broadwater, Gallatin, Meagher	52 min
Sep 14, 8:12 PM MDT	Severe Thunderstorm Warning	TFX	Cascade, Meagher	63 min
Dec 26, 12:23 PM MST	Severe Thunderstorm Warning	TFX	Cascade, Chouteau, Teton	38 min

By county

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

13 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 2024 2026

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.