Alert archive / Montana / Severe Thunderstorm Warnings

Severe Thunderstorm Warnings in Montana, 2008

509 severe thunderstorm warnings in 2008. 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 2008. Tap one for its archive.

Severe Thunderstorm Warnings: 509
Busiest month: July210 severe thunderstorm warnings
Busiest day: June 26, 200835 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.

227 of 509 severe thunderstorm warnings covering Montana in 2008 had a qualifying storm report inside them; 317 of 416 hail, wind and damage reports fell inside a warning, on average 23 minutes after it went out.

Montana, 2008

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
Severe thunderstorm warnings	509	227	55%	416	76%	23 min

Each office's whole area, 2008

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
NWS Glasgow, MT: severe thunderstorm warnings	168	69	59%	132	77%	23 min
NWS Billings, MT: severe thunderstorm warnings	187	80	57%	140	79%	27 min
NWS Great Falls, MT: severe thunderstorm warnings	141	74	48%	141	72%	19 min
NWS Missoula, MT: severe thunderstorm warnings	38	11	71%	30	67%	17 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 29, 11:16 PM MDT	Severe Thunderstorm Warning	GGW	Garfield, McCone, Valley	38 min
May 6, 3:15 PM MDT	Severe Thunderstorm Warning	GGW	McCone	30 min
May 18, 5:39 PM MDT	Severe Thunderstorm Warning	GGW	Garfield, McCone, Prairie	66 min
May 18, 5:59 PM MDT	Severe Thunderstorm Warning	GGW	Dawson, Prairie	32 min
May 20, 5:52 PM MDT	Severe Thunderstorm Warning	TFX	Lewis and Clark	38 min
May 20, 6:15 PM MDT	Severe Thunderstorm Warning	MSO	Silver Bow	30 min
May 20, 6:43 PM MDT	Severe Thunderstorm Warning	TFX	Gallatin, Madison	47 min
May 20, 7:42 PM MDT	Severe Thunderstorm Warning	TFX	Cascade, Chouteau	48 min
May 20, 10:23 PM MDT	Severe Thunderstorm Warning	TFX	Blaine, Chouteau, Fergus, Hill	49 min
May 20, 11:21 PM MDT	Severe Thunderstorm Warning	MSO	Deer Lodge, Granite, Powell, Silver Bow	39 min
May 28, 4:36 PM MDT	Severe Thunderstorm Warning	TFX	Cascade, Meagher	39 min
May 29, 4:00 PM MDT	Severe Thunderstorm Warning	TFX	Hill, Liberty	30 min
May 29, 4:43 PM MDT	Severe Thunderstorm Warning	GGW	Dawson, Wibaux	33 min
May 29, 5:44 PM MDT	Severe Thunderstorm Warning	TFX	Blaine, Chouteau, Hill	46 min
May 30, 3:57 PM MDT	Severe Thunderstorm Warning	TFX	Blaine, Chouteau, Fergus	48 min
May 30, 4:59 PM MDT	Severe Thunderstorm Warning	TFX	Fergus, Judith Basin	46 min
May 30, 7:16 PM MDT	Severe Thunderstorm Warning	TFX	Jefferson, Lewis and Clark	31 min
May 31, 5:37 PM MDT	Severe Thunderstorm Warning	GGW	Valley	53 min
May 31, 7:51 PM MDT	Severe Thunderstorm Warning	TFX	Lewis and Clark	24 min
May 31, 10:01 PM MDT	Severe Thunderstorm Warning	GGW	Valley	59 min
Jun 1, 1:43 PM MDT	Severe Thunderstorm Warning	TFX	Fergus	47 min
Jun 1, 2:01 PM MDT	Severe Thunderstorm Warning	TFX	Cascade	44 min
Jun 1, 2:29 PM MDT	Severe Thunderstorm Warning	TFX	Fergus	46 min
Jun 1, 2:30 PM MDT	Severe Thunderstorm Warning	TFX	Fergus, Judith Basin	45 min
Jun 1, 2:42 PM MDT	Severe Thunderstorm Warning	BYZ	Powder River	33 min
Jun 1, 3:13 PM MDT	Severe Thunderstorm Warning	BYZ	Powder River	62 min
Jun 1, 3:48 PM MDT	Severe Thunderstorm Warning	BYZ	Musselshell	57 min
Jun 1, 4:12 PM MDT	Severe Thunderstorm Warning	BYZ	Carter, Powder River	63 min
Jun 1, 4:16 PM MDT	Severe Thunderstorm Warning	BYZ	Custer	59 min
Jun 1, 4:41 PM MDT	Severe Thunderstorm Warning	BYZ	Musselshell, Rosebud, Treasure, Yellowstone	64 min
Jun 1, 4:57 PM MDT	Severe Thunderstorm Warning	TFX	Fergus	48 min
Jun 1, 5:14 PM MDT	Severe Thunderstorm Warning	BYZ	Carter	61 min
Jun 1, 5:51 PM MDT	Severe Thunderstorm Warning	BYZ	Carter	39 min
Jun 1, 6:06 PM MDT	Severe Thunderstorm Warning	BYZ	Rosebud, Treasure	54 min
Jun 1, 6:57 PM MDT	Severe Thunderstorm Warning	BYZ	Rosebud	48 min
Jun 1, 7:41 PM MDT	Severe Thunderstorm Warning	BYZ	Custer, Rosebud	34 min
Jun 1, 8:15 PM MDT	Severe Thunderstorm Warning	BYZ	Yellowstone	39 min
Jun 2, 3:41 PM MDT	Severe Thunderstorm Warning	TFX	Chouteau, Hill	49 min
Jun 2, 4:07 PM MDT	Severe Thunderstorm Warning	BYZ	Stillwater, Sweet Grass	53 min
Jun 2, 4:47 PM MDT	Severe Thunderstorm Warning	BYZ	Carter	58 min
Jun 2, 5:04 PM MDT	Severe Thunderstorm Warning	TFX	Blaine, Hill	56 min
Jun 2, 5:39 PM MDT	Severe Thunderstorm Warning	TFX	Blaine, Chouteau, Fergus, Hill, Judith Basin, Liberty	53 min
Jun 2, 5:55 PM MDT	Severe Thunderstorm Warning	BYZ	Big Horn, Carbon, Yellowstone	47 min
Jun 2, 6:50 PM MDT	Severe Thunderstorm Warning	BYZ	Big Horn, Yellowstone	55 min
Jun 2, 7:42 PM MDT	Severe Thunderstorm Warning	BYZ	Big Horn	63 min
Jun 2, 8:43 PM MDT	Severe Thunderstorm Warning	BYZ	Big Horn, Rosebud	62 min
Jun 2, 9:42 PM MDT	Severe Thunderstorm Warning	BYZ	Big Horn, Powder River	33 min
Jun 10, 12:23 PM MDT	Severe Thunderstorm Warning	TFX	Cascade	67 min
Jun 10, 1:59 PM MDT	Severe Thunderstorm Warning	TFX	Judith Basin	46 min
Jun 10, 2:23 PM MDT	Severe Thunderstorm Warning	TFX	Chouteau	67 min
Jun 10, 2:29 PM MDT	Severe Thunderstorm Warning	BYZ	Golden Valley, Wheatland	61 min
Jun 10, 2:29 PM MDT	Severe Thunderstorm Warning	TFX	Fergus	61 min
Jun 10, 2:57 PM MDT	Severe Thunderstorm Warning	BYZ	Golden Valley, Musselshell	63 min
Jun 10, 3:18 PM MDT	Severe Thunderstorm Warning	BYZ	Yellowstone	41 min
Jun 10, 3:44 PM MDT	Severe Thunderstorm Warning	BYZ	Big Horn, Carbon, Musselshell, Yellowstone	61 min
Jun 10, 3:57 PM MDT	Severe Thunderstorm Warning	BYZ	Musselshell, Yellowstone	53 min
Jun 10, 4:21 PM MDT	Severe Thunderstorm Warning	GGW	Garfield, Petroleum	39 min
Jun 10, 4:56 PM MDT	Severe Thunderstorm Warning	GGW	Garfield, Petroleum, Phillips	64 min
Jun 10, 5:35 PM MDT	Severe Thunderstorm Warning	GGW	Petroleum, Phillips	55 min
Jun 10, 6:07 PM MDT	Severe Thunderstorm Warning	GGW	Phillips	41 min
Jun 13, 2:09 PM MDT	Severe Thunderstorm Warning	GGW	Dawson, McCone, Richland	51 min
Jun 13, 2:19 PM MDT	Severe Thunderstorm Warning	GGW	Valley	56 min
Jun 13, 2:34 PM MDT	Severe Thunderstorm Warning	GGW	Phillips, Valley	56 min
Jun 13, 2:53 PM MDT	Severe Thunderstorm Warning	GGW	Daniels, Richland, Roosevelt, Valley	67 min
Jun 13, 3:33 PM MDT	Severe Thunderstorm Warning	GGW	McCone, Valley	42 min
Jun 14, 12:03 PM MDT	Severe Thunderstorm Warning	GGW	Daniels, Roosevelt, Sheridan	57 min
Jun 14, 12:20 PM MDT	Severe Thunderstorm Warning	GGW	Daniels, Sheridan	55 min
Jun 14, 12:54 PM MDT	Severe Thunderstorm Warning	GGW	Roosevelt, Sheridan	42 min
Jun 14, 1:23 PM MDT	Severe Thunderstorm Warning	GGW	Sheridan	34 min
Jun 16, 3:08 PM MDT	Severe Thunderstorm Warning	TFX	Fergus	52 min
Jun 16, 3:42 PM MDT	Severe Thunderstorm Warning	BYZ	Musselshell	50 min
Jun 16, 5:18 PM MDT	Severe Thunderstorm Warning	BYZ	Musselshell	36 min
Jun 16, 5:22 PM MDT	Severe Thunderstorm Warning	GGW	Garfield	38 min
Jun 16, 5:46 PM MDT	Severe Thunderstorm Warning	GGW	Phillips	48 min
Jun 16, 6:05 PM MDT	Severe Thunderstorm Warning	GGW	Garfield	40 min
Jun 16, 6:09 PM MDT	Severe Thunderstorm Warning	GGW	Garfield	51 min
Jun 16, 6:26 PM MDT	Severe Thunderstorm Warning	BYZ	Musselshell, Yellowstone	64 min
Jun 16, 6:55 PM MDT	Severe Thunderstorm Warning	GGW	Garfield	65 min
Jun 16, 7:46 PM MDT	Severe Thunderstorm Warning	BYZ	Big Horn	59 min
Jun 16, 8:02 PM MDT	Severe Thunderstorm Warning	GGW	Garfield	58 min
Jun 16, 8:17 PM MDT	Severe Thunderstorm Warning	GGW	Garfield	28 min
Jun 16, 8:34 PM MDT	Severe Thunderstorm Warning	BYZ	Big Horn, Rosebud	56 min
Jun 16, 10:49 PM MDT	Severe Thunderstorm Warning	BYZ	Powder River	26 min
Jun 16, 10:54 PM MDT	Severe Thunderstorm Warning	GGW	Valley	54 min
Jun 16, 11:14 PM MDT	Severe Thunderstorm Warning	BYZ	Carter, Powder River	31 min
Jun 17, 12:59 PM MDT	Severe Thunderstorm Warning	GGW	Wibaux	46 min
Jun 17, 3:42 PM MDT	Severe Thunderstorm Warning	GGW	Garfield, Petroleum	63 min
Jun 17, 5:09 PM MDT	Severe Thunderstorm Warning	TFX	Liberty, Toole	51 min
Jun 17, 5:47 PM MDT	Severe Thunderstorm Warning	TFX	Hill, Liberty	43 min
Jun 17, 5:54 PM MDT	Severe Thunderstorm Warning	TFX	Liberty, Toole	36 min
Jun 17, 5:57 PM MDT	Severe Thunderstorm Warning	TFX	Fergus	33 min
Jun 17, 6:29 PM MDT	Severe Thunderstorm Warning	TFX	Chouteau, Hill, Liberty	46 min
Jun 17, 6:29 PM MDT	Severe Thunderstorm Warning	TFX	Fergus	16 min
Jun 17, 6:55 PM MDT	Severe Thunderstorm Warning	BYZ	Golden Valley, Wheatland	65 min
Jun 17, 7:12 PM MDT	Severe Thunderstorm Warning	BYZ	Musselshell	63 min
Jun 17, 7:31 PM MDT	Severe Thunderstorm Warning	BYZ	Golden Valley, Musselshell	29 min
Jun 17, 8:03 PM MDT	Severe Thunderstorm Warning	BYZ	Musselshell, Treasure, Yellowstone	57 min
Jun 17, 8:05 PM MDT	Severe Thunderstorm Warning	BYZ	Golden Valley, Musselshell	31 min
Jun 17, 8:24 PM MDT	Severe Thunderstorm Warning	GGW	Petroleum	66 min
Jun 17, 8:33 PM MDT	Severe Thunderstorm Warning	BYZ	Musselshell, Treasure, Yellowstone	22 min
Jun 17, 8:44 PM MDT	Severe Thunderstorm Warning	BYZ	Golden Valley, Wheatland	15 min
Jun 17, 9:11 PM MDT	Severe Thunderstorm Warning	GGW	Garfield, Petroleum, Phillips	64 min
Jun 17, 10:05 PM MDT	Severe Thunderstorm Warning	TFX	Fergus	44 min
Jun 17, 10:07 PM MDT	Severe Thunderstorm Warning	BYZ	Yellowstone	23 min
Jun 17, 10:29 PM MDT	Severe Thunderstorm Warning	BYZ	Treasure, Yellowstone	61 min
Jun 17, 10:34 PM MDT	Severe Thunderstorm Warning	BYZ	Big Horn	41 min
Jun 17, 10:43 PM MDT	Severe Thunderstorm Warning	GGW	Phillips	47 min
Jun 17, 10:52 PM MDT	Severe Thunderstorm Warning	GGW	Valley	38 min
Jun 17, 11:09 PM MDT	Severe Thunderstorm Warning	BYZ	Big Horn, Rosebud, Treasure	66 min
Jun 17, 11:26 PM MDT	Severe Thunderstorm Warning	GGW	Valley	31 min
Jun 17, 11:29 PM MDT	Severe Thunderstorm Warning	BYZ	Treasure	31 min
Jun 17, 11:49 PM MDT	Severe Thunderstorm Warning	BYZ	Big Horn, Rosebud	56 min
Jun 18, 12:27 AM MDT	Severe Thunderstorm Warning	BYZ	Yellowstone	48 min
Jun 18, 12:41 AM MDT	Severe Thunderstorm Warning	BYZ	Powder River, Rosebud	64 min
Jun 18, 12:47 AM MDT	Severe Thunderstorm Warning	GGW	Daniels, Valley	43 min
Jun 18, 1:14 AM MDT	Severe Thunderstorm Warning	BYZ	Treasure, Yellowstone	61 min
Jun 18, 1:33 AM MDT	Severe Thunderstorm Warning	BYZ	Carter, Powder River	46 min
Jun 18, 3:58 AM MDT	Severe Thunderstorm Warning	BYZ	Big Horn, Rosebud, Treasure	62 min
Jun 18, 3:37 PM MDT	Severe Thunderstorm Warning	GGW	Richland, Roosevelt	23 min
Jun 18, 4:17 PM MDT	Severe Thunderstorm Warning	BYZ	Powder River	73 min
Jun 18, 7:49 PM MDT	Severe Thunderstorm Warning	BYZ	Big Horn, Carbon	56 min
Jun 18, 8:02 PM MDT	Severe Thunderstorm Warning	BYZ	Big Horn, Yellowstone	58 min
Jun 18, 8:42 PM MDT	Severe Thunderstorm Warning	BYZ	Big Horn	78 min
Jun 18, 8:53 PM MDT	Severe Thunderstorm Warning	BYZ	Big Horn, Treasure, Yellowstone	67 min
Jun 18, 9:58 PM MDT	Severe Thunderstorm Warning	BYZ	Big Horn, Rosebud	62 min
Jun 19, 2:25 PM MDT	Severe Thunderstorm Warning	BYZ	Powder River, Rosebud	51 min
Jun 19, 2:53 PM MDT	Severe Thunderstorm Warning	BYZ	Powder River	82 min
Jun 19, 3:21 PM MDT	Severe Thunderstorm Warning	BYZ	Powder River	34 min
Jun 19, 3:59 PM MDT	Severe Thunderstorm Warning	BYZ	Custer	61 min
Jun 19, 4:15 PM MDT	Severe Thunderstorm Warning	BYZ	Powder River	60 min
Jun 19, 8:25 PM MDT	Severe Thunderstorm Warning	BYZ	Powder River	65 min
Jun 21, 6:09 PM MDT	Severe Thunderstorm Warning	TFX	Beaverhead, Madison	51 min
Jun 22, 4:31 PM MDT	Severe Thunderstorm Warning	TFX	Beaverhead, Gallatin, Madison	89 min
Jun 22, 5:26 PM MDT	Severe Thunderstorm Warning	GGW	McCone, Prairie	64 min
Jun 22, 5:47 PM MDT	Severe Thunderstorm Warning	GGW	Daniels, Dawson, McCone, Richland, Roosevelt, Valley	58 min
Jun 22, 7:02 PM MDT	Severe Thunderstorm Warning	GGW	Dawson, Prairie	29 min
Jun 22, 7:08 PM MDT	Severe Thunderstorm Warning	BYZ	Big Horn	67 min
Jun 22, 7:11 PM MDT	Severe Thunderstorm Warning	GGW	Dawson, McCone, Richland, Roosevelt	64 min
Jun 22, 8:15 PM MDT	Severe Thunderstorm Warning	BYZ	Big Horn	60 min
Jun 22, 8:15 PM MDT	Severe Thunderstorm Warning	GGW	Dawson, Richland	36 min
Jun 22, 9:06 PM MDT	Severe Thunderstorm Warning	BYZ	Big Horn	54 min
Jun 22, 9:58 PM MDT	Severe Thunderstorm Warning	BYZ	Big Horn	62 min
Jun 23, 2:47 PM MDT	Severe Thunderstorm Warning	TFX	Blaine	28 min
Jun 23, 2:48 PM MDT	Severe Thunderstorm Warning	TFX	Fergus	27 min
Jun 23, 2:59 PM MDT	Severe Thunderstorm Warning	GGW	Petroleum	46 min
Jun 23, 3:30 PM MDT	Severe Thunderstorm Warning	GGW	Phillips	60 min
Jun 23, 4:11 PM MDT	Severe Thunderstorm Warning	BYZ	Musselshell	64 min
Jun 24, 5:15 AM MDT	Severe Thunderstorm Warning	TFX	Fergus	45 min
Jun 24, 1:13 PM MDT	Severe Thunderstorm Warning	GGW	Dawson, Richland, Wibaux	32 min
Jun 25, 2:48 PM MDT	Severe Thunderstorm Warning	TFX	Fergus	27 min
Jun 25, 3:08 PM MDT	Severe Thunderstorm Warning	GGW	Petroleum	67 min
Jun 25, 5:54 PM MDT	Severe Thunderstorm Warning	GGW	Valley	54 min
Jun 25, 6:05 PM MDT	Severe Thunderstorm Warning	BYZ	Stillwater, Sweet Grass	40 min
Jun 25, 6:57 PM MDT	Severe Thunderstorm Warning	GGW	Valley	53 min
Jun 25, 7:06 PM MDT	Severe Thunderstorm Warning	BYZ	Carbon, Stillwater	54 min
Jun 25, 7:12 PM MDT	Severe Thunderstorm Warning	BYZ	Powder River, Rosebud	48 min
Jun 25, 7:49 PM MDT	Severe Thunderstorm Warning	BYZ	Custer, Powder River, Rosebud	41 min
Jun 25, 7:53 PM MDT	Severe Thunderstorm Warning	BYZ	Carbon	37 min
Jun 25, 8:06 PM MDT	Severe Thunderstorm Warning	BYZ	Carbon, Golden Valley, Stillwater, Sweet Grass, Yellowstone	47 min
Jun 25, 8:26 PM MDT	Severe Thunderstorm Warning	BYZ	Big Horn, Carbon	64 min
Jun 25, 8:27 PM MDT	Severe Thunderstorm Warning	BYZ	Custer, Powder River	36 min
Jun 25, 8:47 PM MDT	Severe Thunderstorm Warning	BYZ	Golden Valley, Musselshell, Stillwater, Yellowstone	37 min
Jun 25, 9:13 PM MDT	Severe Thunderstorm Warning	GGW	Dawson, Prairie	62 min
Jun 25, 9:22 PM MDT	Severe Thunderstorm Warning	BYZ	Big Horn	53 min
Jun 25, 9:51 PM MDT	Severe Thunderstorm Warning	BYZ	Big Horn	46 min
Jun 25, 10:06 PM MDT	Severe Thunderstorm Warning	BYZ	Big Horn	54 min
Jun 25, 10:11 PM MDT	Severe Thunderstorm Warning	GGW	Dawson, Prairie	33 min
Jun 25, 10:25 PM MDT	Severe Thunderstorm Warning	BYZ	Big Horn, Rosebud	65 min
Jun 25, 10:46 PM MDT	Severe Thunderstorm Warning	GGW	Daniels, Sheridan	29 min
Jun 25, 10:57 PM MDT	Severe Thunderstorm Warning	BYZ	Big Horn	63 min
Jun 25, 11:09 PM MDT	Severe Thunderstorm Warning	BYZ	Powder River	66 min
Jun 26, 12:11 AM MDT	Severe Thunderstorm Warning	BYZ	Big Horn	59 min
Jun 26, 12:29 AM MDT	Severe Thunderstorm Warning	TFX	Fergus	61 min
Jun 26, 5:53 AM MDT	Severe Thunderstorm Warning	GGW	Phillips, Valley	67 min
Jun 26, 6:59 AM MDT	Severe Thunderstorm Warning	GGW	Valley	61 min
Jun 26, 9:12 AM MDT	Severe Thunderstorm Warning	GGW	Roosevelt, Valley	63 min
Jun 26, 9:51 AM MDT	Severe Thunderstorm Warning	GGW	Roosevelt, Sheridan	54 min
Jun 26, 10:35 AM MDT	Severe Thunderstorm Warning	GGW	Richland, Roosevelt	55 min
Jun 26, 11:40 AM MDT	Severe Thunderstorm Warning	GGW	Roosevelt	35 min
Jun 26, 12:05 PM MDT	Severe Thunderstorm Warning	GGW	Richland	22 min
Jun 26, 12:23 PM MDT	Severe Thunderstorm Warning	GGW	Dawson, Wibaux	67 min
Jun 26, 1:36 PM MDT	Severe Thunderstorm Warning	GGW	Wibaux	24 min
Jun 26, 3:29 PM MDT	Severe Thunderstorm Warning	GGW	Valley	61 min
Jun 26, 4:51 PM MDT	Severe Thunderstorm Warning	GGW	Daniels, Valley	54 min
Jun 26, 4:59 PM MDT	Severe Thunderstorm Warning	GGW	Dawson, McCone, Richland	61 min
Jun 26, 5:23 PM MDT	Severe Thunderstorm Warning	GGW	Dawson	67 min
Jun 26, 5:45 PM MDT	Severe Thunderstorm Warning	GGW	Daniels, Valley	45 min
Jun 26, 6:01 PM MDT	Severe Thunderstorm Warning	GGW	Dawson, Richland	29 min
Jun 26, 6:23 PM MDT	Severe Thunderstorm Warning	GGW	Dawson, Richland, Wibaux	67 min
Jun 26, 7:28 PM MDT	Severe Thunderstorm Warning	GGW	Wibaux	32 min
Jun 26, 10:33 PM MDT	Severe Thunderstorm Warning	BYZ	Custer	57 min
Jun 27, 12:06 AM MDT	Severe Thunderstorm Warning	BYZ	Carter	54 min
Jul 1, 1:34 PM MDT	Severe Thunderstorm Warning	TFX	Beaverhead, Madison	41 min
Jul 1, 2:19 PM MDT	Severe Thunderstorm Warning	TFX	Gallatin, Madison	41 min
Jul 1, 3:23 PM MDT	Severe Thunderstorm Warning	BYZ	Stillwater	37 min
Jul 1, 4:27 PM MDT	Severe Thunderstorm Warning	TFX	Lewis and Clark	48 min
Jul 1, 4:33 PM MDT	Severe Thunderstorm Warning	BYZ	Yellowstone	33 min
Jul 1, 6:43 PM MDT	Severe Thunderstorm Warning	MSO	Lincoln	30 min
Jul 1, 8:27 PM MDT	Severe Thunderstorm Warning	MSO	Powell	48 min
Jul 1, 9:10 PM MDT	Severe Thunderstorm Warning	MSO	Granite, Powell	44 min
Jul 4, 1:03 PM MDT	Severe Thunderstorm Warning	TFX	Glacier	27 min
Jul 4, 3:50 PM MDT	Severe Thunderstorm Warning	MSO	Flathead	25 min
Jul 4, 3:50 PM MDT	Severe Thunderstorm Warning	TFX	Pondera	40 min
Jul 4, 3:56 PM MDT	Severe Thunderstorm Warning	TFX	Lewis and Clark	49 min
Jul 4, 4:10 PM MDT	Severe Thunderstorm Warning	TFX	Chouteau, Fergus, Judith Basin	50 min
Jul 4, 4:10 PM MDT	Severe Thunderstorm Warning	TFX	Judith Basin, Meagher	25 min
Jul 4, 4:27 PM MDT	Severe Thunderstorm Warning	MSO	Powell	26 min
Jul 4, 4:37 PM MDT	Severe Thunderstorm Warning	MSO	Flathead	38 min
Jul 4, 4:38 PM MDT	Severe Thunderstorm Warning	TFX	Judith Basin	67 min
Jul 4, 4:48 PM MDT	Severe Thunderstorm Warning	TFX	Pondera, Teton	42 min
Jul 4, 4:57 PM MDT	Severe Thunderstorm Warning	TFX	Glacier	48 min
Jul 4, 4:58 PM MDT	Severe Thunderstorm Warning	MSO	Flathead, Lake, Missoula, Sanders	47 min
Jul 4, 5:06 PM MDT	Severe Thunderstorm Warning	TFX	Cascade, Meagher	39 min
Jul 4, 5:08 PM MDT	Severe Thunderstorm Warning	TFX	Cascade, Lewis and Clark	52 min
Jul 4, 5:13 PM MDT	Severe Thunderstorm Warning	TFX	Glacier, Pondera	47 min
Jul 4, 5:18 PM MDT	Severe Thunderstorm Warning	TFX	Fergus	40 min
Jul 4, 5:23 PM MDT	Severe Thunderstorm Warning	TFX	Fergus, Judith Basin	34 min
Jul 4, 5:26 PM MDT	Severe Thunderstorm Warning	TFX	Pondera, Toole	49 min
Jul 4, 5:38 PM MDT	Severe Thunderstorm Warning	TFX	Cascade, Lewis and Clark, Teton	52 min
Jul 4, 5:40 PM MDT	Severe Thunderstorm Warning	MSO	Flathead, Lake, Missoula, Powell	48 min
Jul 4, 5:45 PM MDT	Severe Thunderstorm Warning	TFX	Cascade, Meagher	45 min
Jul 4, 5:52 PM MDT	Severe Thunderstorm Warning	TFX	Glacier	38 min
Jul 4, 5:57 PM MDT	Severe Thunderstorm Warning	TFX	Lewis and Clark, Teton	63 min
Jul 4, 6:02 PM MDT	Severe Thunderstorm Warning	TFX	Chouteau, Fergus, Judith Basin	43 min
Jul 4, 6:07 PM MDT	Severe Thunderstorm Warning	TFX	Cascade, Judith Basin	38 min
Jul 4, 6:12 PM MDT	Severe Thunderstorm Warning	TFX	Glacier, Pondera, Teton, Toole	48 min
Jul 4, 6:27 PM MDT	Severe Thunderstorm Warning	TFX	Cascade, Chouteau, Judith Basin, Lewis and Clark, Teton	48 min
Jul 4, 6:28 PM MDT	Severe Thunderstorm Warning	GGW	Petroleum	43 min
Jul 4, 6:29 PM MDT	Severe Thunderstorm Warning	TFX	Glacier	31 min
Jul 4, 6:32 PM MDT	Severe Thunderstorm Warning	TFX	Lewis and Clark	43 min
Jul 4, 6:47 PM MDT	Severe Thunderstorm Warning	TFX	Chouteau, Judith Basin	25 min
Jul 4, 6:54 PM MDT	Severe Thunderstorm Warning	GGW	Garfield, Petroleum, Phillips	66 min
Jul 4, 6:58 PM MDT	Severe Thunderstorm Warning	TFX	Cascade, Chouteau, Fergus, Judith Basin, Teton	47 min
Jul 4, 7:00 PM MDT	Severe Thunderstorm Warning	TFX	Chouteau, Pondera, Teton	45 min
Jul 4, 7:04 PM MDT	Severe Thunderstorm Warning	TFX	Pondera, Teton, Toole	28 min
Jul 4, 7:27 PM MDT	Severe Thunderstorm Warning	MSO	Deer Lodge, Granite, Powell	48 min
Jul 4, 7:38 PM MDT	Severe Thunderstorm Warning	TFX	Chouteau, Lewis and Clark, Liberty, Pondera, Teton, Toole	52 min
Jul 4, 7:42 PM MDT	Severe Thunderstorm Warning	TFX	Blaine, Chouteau, Hill, Liberty	63 min
Jul 4, 7:57 PM MDT	Severe Thunderstorm Warning	GGW	Garfield, Phillips, Valley	24 min
Jul 4, 8:08 PM MDT	Severe Thunderstorm Warning	GGW	Garfield, Phillips, Valley	37 min
Jul 4, 8:08 PM MDT	Severe Thunderstorm Warning	TFX	Hill, Liberty	67 min
Jul 4, 8:10 PM MDT	Severe Thunderstorm Warning	MSO	Deer Lodge, Granite, Powell	50 min
Jul 4, 8:21 PM MDT	Severe Thunderstorm Warning	TFX	Lewis and Clark	39 min
Jul 4, 8:27 PM MDT	Severe Thunderstorm Warning	MSO	Deer Lodge, Granite, Powell	48 min
Jul 4, 8:36 PM MDT	Severe Thunderstorm Warning	TFX	Blaine, Hill	39 min
Jul 4, 8:43 PM MDT	Severe Thunderstorm Warning	TFX	Chouteau, Hill	32 min
Jul 4, 9:15 PM MDT	Severe Thunderstorm Warning	GGW	Garfield, McCone	35 min
Jul 4, 9:15 PM MDT	Severe Thunderstorm Warning	TFX	Blaine, Hill	45 min
Jul 4, 9:57 PM MDT	Severe Thunderstorm Warning	MSO	Deer Lodge, Silver Bow	48 min
Jul 4, 10:40 PM MDT	Severe Thunderstorm Warning	GGW	Garfield	65 min
Jul 5, 3:52 PM MDT	Severe Thunderstorm Warning	BYZ	Rosebud, Treasure	41 min
Jul 5, 5:19 PM MDT	Severe Thunderstorm Warning	BYZ	Powder River, Rosebud	56 min
Jul 5, 6:09 PM MDT	Severe Thunderstorm Warning	BYZ	Powder River	66 min
Jul 5, 7:11 PM MDT	Severe Thunderstorm Warning	BYZ	Powder River	19 min
Jul 5, 7:22 PM MDT	Severe Thunderstorm Warning	BYZ	Big Horn, Rosebud	53 min
Jul 5, 7:34 PM MDT	Severe Thunderstorm Warning	BYZ	Powder River, Rosebud	56 min
Jul 6, 1:46 PM MDT	Severe Thunderstorm Warning	BYZ	Custer, Powder River, Rosebud	59 min
Jul 6, 2:44 PM MDT	Severe Thunderstorm Warning	BYZ	Custer, Powder River, Rosebud	45 min
Jul 6, 3:30 PM MDT	Severe Thunderstorm Warning	BYZ	Powder River, Rosebud	60 min
Jul 6, 4:28 PM MDT	Severe Thunderstorm Warning	BYZ	Custer, Powder River, Rosebud	62 min
Jul 6, 5:35 PM MDT	Severe Thunderstorm Warning	BYZ	Carter	55 min
Jul 6, 6:24 PM MDT	Severe Thunderstorm Warning	BYZ	Carter	48 min
Jul 6, 6:40 PM MDT	Severe Thunderstorm Warning	BYZ	Big Horn, Powder River, Rosebud	65 min
Jul 6, 7:45 PM MDT	Severe Thunderstorm Warning	BYZ	Rosebud	32 min
Jul 7, 10:20 PM MDT	Severe Thunderstorm Warning	TFX	Blaine, Hill	70 min
Jul 7, 11:22 PM MDT	Severe Thunderstorm Warning	GGW	Phillips	38 min
Jul 10, 12:17 AM MDT	Severe Thunderstorm Warning	GGW	Daniels, Sheridan	58 min
Jul 10, 9:34 PM MDT	Severe Thunderstorm Warning	GGW	Roosevelt, Sheridan	21 min
Jul 16, 3:18 PM MDT	Severe Thunderstorm Warning	BYZ	Carbon, Stillwater	42 min
Jul 16, 5:59 PM MDT	Severe Thunderstorm Warning	BYZ	Big Horn	61 min
Jul 16, 6:51 PM MDT	Severe Thunderstorm Warning	BYZ	Big Horn, Powder River, Rosebud	54 min
Jul 16, 8:05 PM MDT	Severe Thunderstorm Warning	GGW	Petroleum, Phillips	27 min
Jul 16, 8:18 PM MDT	Severe Thunderstorm Warning	BYZ	Powder River	57 min
Jul 17, 11:24 PM MDT	Severe Thunderstorm Warning	TFX	Cascade, Judith Basin, Meagher	36 min
Jul 18, 2:06 AM MDT	Severe Thunderstorm Warning	TFX	Hill, Liberty	24 min
Jul 18, 3:11 AM MDT	Severe Thunderstorm Warning	TFX	Hill	34 min
Jul 18, 3:48 AM MDT	Severe Thunderstorm Warning	TFX	Hill	42 min
Jul 18, 12:00 PM MDT	Severe Thunderstorm Warning	GGW	Phillips	60 min
Jul 18, 1:21 PM MDT	Severe Thunderstorm Warning	BYZ	Custer, Rosebud	54 min
Jul 18, 1:30 PM MDT	Severe Thunderstorm Warning	BYZ	Carter, Fallon	45 min
Jul 18, 1:51 PM MDT	Severe Thunderstorm Warning	BYZ	Yellowstone	39 min
Jul 18, 2:12 PM MDT	Severe Thunderstorm Warning	GGW	Garfield, Phillips	45 min
Jul 18, 2:13 PM MDT	Severe Thunderstorm Warning	BYZ	Custer	62 min
Jul 18, 2:29 PM MDT	Severe Thunderstorm Warning	BYZ	Big Horn	61 min
Jul 18, 2:52 PM MDT	Severe Thunderstorm Warning	BYZ	Big Horn	53 min
Jul 18, 2:59 PM MDT	Severe Thunderstorm Warning	BYZ	Big Horn	61 min
Jul 18, 3:11 PM MDT	Severe Thunderstorm Warning	BYZ	Carter, Custer, Fallon	64 min
Jul 18, 3:12 PM MDT	Severe Thunderstorm Warning	BYZ	Big Horn	48 min
Jul 18, 3:42 PM MDT	Severe Thunderstorm Warning	BYZ	Big Horn, Rosebud	63 min
Jul 18, 3:49 PM MDT	Severe Thunderstorm Warning	TFX	Gallatin	41 min
Jul 18, 3:52 PM MDT	Severe Thunderstorm Warning	BYZ	Big Horn	28 min
Jul 18, 4:12 PM MDT	Severe Thunderstorm Warning	BYZ	Carter, Fallon	33 min
Jul 18, 4:33 PM MDT	Severe Thunderstorm Warning	BYZ	Powder River, Rosebud	72 min
Jul 18, 5:39 PM MDT	Severe Thunderstorm Warning	BYZ	Powder River	54 min
Jul 19, 6:25 AM MDT	Severe Thunderstorm Warning	GGW	Valley	53 min
Jul 19, 9:49 AM MDT	Severe Thunderstorm Warning	GGW	Daniels	56 min
Jul 19, 10:32 AM MDT	Severe Thunderstorm Warning	GGW	Daniels, Roosevelt, Sheridan	58 min
Jul 19, 11:30 AM MDT	Severe Thunderstorm Warning	GGW	Roosevelt, Sheridan	60 min
Jul 19, 12:10 PM MDT	Severe Thunderstorm Warning	GGW	Richland, Roosevelt	65 min
Jul 19, 12:29 PM MDT	Severe Thunderstorm Warning	GGW	Roosevelt, Sheridan	16 min
Jul 19, 4:11 PM MDT	Severe Thunderstorm Warning	GGW	Daniels	64 min
Jul 19, 5:11 PM MDT	Severe Thunderstorm Warning	GGW	Daniels, Roosevelt, Sheridan	64 min
Jul 19, 6:07 PM MDT	Severe Thunderstorm Warning	GGW	Daniels, Sheridan	41 min
Jul 20, 4:42 PM MDT	Severe Thunderstorm Warning	GGW	Dawson, Wibaux	48 min
Jul 20, 5:16 PM MDT	Severe Thunderstorm Warning	GGW	Wibaux	29 min
Jul 22, 2:11 PM MDT	Severe Thunderstorm Warning	MSO	Ravalli	64 min
Jul 22, 3:04 PM MDT	Severe Thunderstorm Warning	TFX	Gallatin	26 min
Jul 22, 3:20 PM MDT	Severe Thunderstorm Warning	BYZ	Park	31 min
Jul 22, 3:38 PM MDT	Severe Thunderstorm Warning	TFX	Beaverhead, Madison	67 min
Jul 22, 4:48 PM MDT	Severe Thunderstorm Warning	GGW	Richland	33 min
Jul 22, 4:52 PM MDT	Severe Thunderstorm Warning	BYZ	Powder River	53 min
Jul 22, 4:53 PM MDT	Severe Thunderstorm Warning	TFX	Gallatin, Madison	67 min
Jul 22, 4:57 PM MDT	Severe Thunderstorm Warning	GGW	McCone, Roosevelt	63 min
Jul 22, 5:44 PM MDT	Severe Thunderstorm Warning	BYZ	Carter, Powder River	61 min
Jul 22, 5:55 PM MDT	Severe Thunderstorm Warning	BYZ	Golden Valley, Stillwater, Sweet Grass	54 min
Jul 22, 5:59 PM MDT	Severe Thunderstorm Warning	TFX	Gallatin	48 min
Jul 22, 6:15 PM MDT	Severe Thunderstorm Warning	BYZ	Park	60 min
Jul 22, 6:24 PM MDT	Severe Thunderstorm Warning	GGW	Richland, Roosevelt	66 min
Jul 22, 7:00 PM MDT	Severe Thunderstorm Warning	GGW	Roosevelt, Sheridan	24 min
Jul 22, 7:09 PM MDT	Severe Thunderstorm Warning	GGW	Daniels, Roosevelt, Sheridan	66 min
Jul 22, 7:20 PM MDT	Severe Thunderstorm Warning	GGW	Sheridan	55 min
Jul 22, 7:38 PM MDT	Severe Thunderstorm Warning	GGW	Daniels, Sheridan	52 min
Jul 22, 7:59 PM MDT	Severe Thunderstorm Warning	GGW	McCone, Valley	61 min
Jul 22, 8:13 PM MDT	Severe Thunderstorm Warning	GGW	Daniels, Roosevelt, Sheridan	62 min
Jul 22, 8:51 PM MDT	Severe Thunderstorm Warning	GGW	Daniels, Sheridan	39 min
Jul 22, 8:55 PM MDT	Severe Thunderstorm Warning	BYZ	Big Horn, Yellowstone	65 min
Jul 22, 9:14 PM MDT	Severe Thunderstorm Warning	GGW	Daniels	46 min
Jul 22, 9:34 PM MDT	Severe Thunderstorm Warning	BYZ	Big Horn	26 min
Jul 22, 9:35 PM MDT	Severe Thunderstorm Warning	GGW	Roosevelt	55 min
Jul 22, 9:54 PM MDT	Severe Thunderstorm Warning	BYZ	Big Horn, Rosebud, Treasure, Yellowstone	66 min
Jul 22, 10:28 PM MDT	Severe Thunderstorm Warning	GGW	Roosevelt	37 min
Jul 22, 10:58 PM MDT	Severe Thunderstorm Warning	BYZ	Big Horn, Custer, Powder River, Rosebud	62 min
Jul 22, 11:35 PM MDT	Severe Thunderstorm Warning	GGW	Daniels, Sheridan	55 min
Jul 22, 11:56 PM MDT	Severe Thunderstorm Warning	BYZ	Custer, Powder River, Rosebud	49 min
Jul 23, 12:09 AM MDT	Severe Thunderstorm Warning	GGW	McCone, Prairie	66 min
Jul 23, 12:28 AM MDT	Severe Thunderstorm Warning	GGW	Daniels, Sheridan	62 min
Jul 23, 12:48 AM MDT	Severe Thunderstorm Warning	GGW	Dawson, McCone	42 min
Jul 23, 1:21 AM MDT	Severe Thunderstorm Warning	GGW	Dawson, Richland	54 min
Jul 23, 6:44 PM MDT	Severe Thunderstorm Warning	MSO	Ravalli	32 min
Jul 23, 7:59 PM MDT	Severe Thunderstorm Warning	TFX	Chouteau	39 min
Jul 23, 8:16 PM MDT	Severe Thunderstorm Warning	BYZ	Stillwater, Sweet Grass	37 min
Jul 23, 8:16 PM MDT	Severe Thunderstorm Warning	MSO	Missoula	29 min
Jul 23, 8:54 PM MDT	Severe Thunderstorm Warning	TFX	Cascade, Lewis and Clark	51 min
Jul 23, 9:36 PM MDT	Severe Thunderstorm Warning	TFX	Cascade, Lewis and Clark, Meagher	54 min
Jul 23, 10:19 PM MDT	Severe Thunderstorm Warning	TFX	Pondera, Teton	41 min
Jul 23, 10:25 PM MDT	Severe Thunderstorm Warning	TFX	Cascade, Judith Basin, Meagher	50 min
Jul 23, 10:55 PM MDT	Severe Thunderstorm Warning	TFX	Pondera, Toole	50 min
Jul 23, 11:45 PM MDT	Severe Thunderstorm Warning	TFX	Toole	30 min
Jul 24, 12:28 PM MDT	Severe Thunderstorm Warning	GGW	Phillips	62 min
Jul 24, 1:21 PM MDT	Severe Thunderstorm Warning	GGW	Phillips, Valley	39 min
Jul 24, 2:00 PM MDT	Severe Thunderstorm Warning	GGW	Garfield, Phillips, Valley	60 min
Jul 24, 3:32 PM MDT	Severe Thunderstorm Warning	GGW	Garfield, Petroleum	36 min
Jul 24, 3:42 PM MDT	Severe Thunderstorm Warning	GGW	Phillips, Valley	32 min
Jul 24, 4:26 PM MDT	Severe Thunderstorm Warning	GGW	Phillips, Valley	49 min
Jul 24, 6:44 PM MDT	Severe Thunderstorm Warning	GGW	Richland, Roosevelt, Sheridan	52 min
Jul 24, 8:22 PM MDT	Severe Thunderstorm Warning	BYZ	Carter, Powder River	53 min
Jul 26, 8:55 AM MDT	Severe Thunderstorm Warning	TFX	Glacier, Pondera, Toole	50 min
Jul 26, 10:34 AM MDT	Severe Thunderstorm Warning	TFX	Toole	41 min
Jul 26, 11:48 AM MDT	Severe Thunderstorm Warning	TFX	Toole	42 min
Jul 26, 12:20 PM MDT	Severe Thunderstorm Warning	TFX	Hill, Liberty, Toole	40 min
Jul 26, 1:57 PM MDT	Severe Thunderstorm Warning	TFX	Blaine, Hill	48 min
Jul 26, 2:16 PM MDT	Severe Thunderstorm Warning	TFX	Blaine, Hill	59 min
Jul 26, 3:17 PM MDT	Severe Thunderstorm Warning	TFX	Blaine	58 min
Jul 26, 3:49 PM MDT	Severe Thunderstorm Warning	TFX	Fergus	26 min
Jul 26, 3:57 PM MDT	Severe Thunderstorm Warning	GGW	Petroleum	40 min
Jul 26, 4:14 PM MDT	Severe Thunderstorm Warning	TFX	Blaine	31 min
Jul 26, 4:34 PM MDT	Severe Thunderstorm Warning	GGW	Phillips	56 min
Jul 26, 4:39 PM MDT	Severe Thunderstorm Warning	GGW	Phillips	66 min
Jul 26, 5:01 PM MDT	Severe Thunderstorm Warning	BYZ	Powder River	26 min
Jul 26, 5:27 PM MDT	Severe Thunderstorm Warning	GGW	Phillips	63 min
Jul 26, 6:25 PM MDT	Severe Thunderstorm Warning	GGW	Garfield, Petroleum	37 min
Jul 26, 6:29 PM MDT	Severe Thunderstorm Warning	GGW	Garfield, Phillips, Valley	61 min
Jul 26, 6:41 PM MDT	Severe Thunderstorm Warning	GGW	Roosevelt, Valley	64 min
Jul 26, 7:55 PM MDT	Severe Thunderstorm Warning	GGW	Roosevelt	50 min
Jul 26, 8:29 PM MDT	Severe Thunderstorm Warning	GGW	Dawson, McCone, Richland	61 min
Jul 26, 8:52 PM MDT	Severe Thunderstorm Warning	GGW	Richland	53 min
Jul 26, 8:57 PM MDT	Severe Thunderstorm Warning	GGW	Dawson, McCone, Prairie	63 min
Jul 26, 9:16 PM MDT	Severe Thunderstorm Warning	BYZ	Yellowstone	59 min
Jul 26, 9:21 PM MDT	Severe Thunderstorm Warning	GGW	Richland	54 min
Jul 26, 9:32 PM MDT	Severe Thunderstorm Warning	GGW	Dawson, McCone, Richland	58 min
Jul 26, 9:48 PM MDT	Severe Thunderstorm Warning	BYZ	Big Horn, Yellowstone	57 min
Jul 26, 9:50 PM MDT	Severe Thunderstorm Warning	GGW	Dawson, Richland, Wibaux	55 min
Jul 26, 9:53 PM MDT	Severe Thunderstorm Warning	GGW	Dawson, McCone, Prairie	67 min
Jul 26, 10:21 PM MDT	Severe Thunderstorm Warning	BYZ	Custer, Fallon	54 min
Jul 26, 10:22 PM MDT	Severe Thunderstorm Warning	GGW	Prairie	53 min
Jul 26, 10:37 PM MDT	Severe Thunderstorm Warning	BYZ	Big Horn, Rosebud, Treasure	53 min
Jul 26, 10:39 PM MDT	Severe Thunderstorm Warning	GGW	Dawson, Prairie, Wibaux	66 min
Jul 26, 11:09 PM MDT	Severe Thunderstorm Warning	BYZ	Custer, Fallon	66 min
Jul 26, 11:09 PM MDT	Severe Thunderstorm Warning	GGW	Wibaux	66 min
Jul 27, 12:15 AM MDT	Severe Thunderstorm Warning	BYZ	Fallon	30 min
Jul 27, 1:12 AM MDT	Severe Thunderstorm Warning	BYZ	Carter, Custer, Fallon	30 min
Jul 27, 1:27 AM MDT	Severe Thunderstorm Warning	GGW	Garfield	63 min
Jul 27, 2:07 AM MDT	Severe Thunderstorm Warning	GGW	Garfield, Valley	25 min
Jul 27, 4:46 AM MDT	Severe Thunderstorm Warning	TFX	Chouteau	33 min
Jul 28, 1:31 AM MDT	Severe Thunderstorm Warning	TFX	Fergus	44 min
Jul 28, 1:55 AM MDT	Severe Thunderstorm Warning	GGW	Garfield	65 min
Jul 28, 2:38 AM MDT	Severe Thunderstorm Warning	BYZ	Rosebud	38 min
Jul 28, 2:57 AM MDT	Severe Thunderstorm Warning	GGW	Garfield	63 min
Jul 28, 3:04 AM MDT	Severe Thunderstorm Warning	GGW	Roosevelt, Valley	56 min
Jul 28, 4:05 AM MDT	Severe Thunderstorm Warning	GGW	McCone, Richland, Roosevelt	55 min
Jul 28, 4:57 AM MDT	Severe Thunderstorm Warning	GGW	Richland, Roosevelt, Sheridan	48 min
Jul 30, 5:04 PM MDT	Severe Thunderstorm Warning	GGW	Daniels, Sheridan	56 min
Aug 1, 11:44 PM MDT	Severe Thunderstorm Warning	GGW	Dawson, Richland	61 min
Aug 2, 12:19 AM MDT	Severe Thunderstorm Warning	GGW	Richland, Roosevelt	56 min
Aug 2, 5:34 PM MDT	Severe Thunderstorm Warning	TFX	Broadwater, Meagher	41 min
Aug 2, 7:28 PM MDT	Severe Thunderstorm Warning	GGW	Phillips	47 min
Aug 2, 9:11 PM MDT	Severe Thunderstorm Warning	BYZ	Musselshell	64 min
Aug 2, 9:57 PM MDT	Severe Thunderstorm Warning	BYZ	Musselshell, Rosebud, Treasure, Yellowstone	63 min
Aug 2, 10:23 PM MDT	Severe Thunderstorm Warning	BYZ	Carter, Powder River	30 min
Aug 2, 10:51 PM MDT	Severe Thunderstorm Warning	BYZ	Custer, Rosebud	54 min
Aug 2, 11:33 PM MDT	Severe Thunderstorm Warning	GGW	Dawson, McCone, Prairie	57 min
Aug 2, 11:41 PM MDT	Severe Thunderstorm Warning	BYZ	Custer, Fallon	64 min
Aug 3, 12:20 AM MDT	Severe Thunderstorm Warning	GGW	Dawson, Prairie, Wibaux	55 min
Aug 3, 12:31 AM MDT	Severe Thunderstorm Warning	GGW	Dawson, McCone, Prairie	28 min
Aug 3, 1:13 AM MDT	Severe Thunderstorm Warning	GGW	Wibaux	32 min
Aug 3, 9:21 PM MDT	Severe Thunderstorm Warning	BYZ	Big Horn	54 min
Aug 3, 9:56 PM MDT	Severe Thunderstorm Warning	BYZ	Custer, Powder River, Rosebud	64 min
Aug 3, 10:12 PM MDT	Severe Thunderstorm Warning	BYZ	Big Horn, Rosebud	63 min
Aug 3, 11:00 PM MDT	Severe Thunderstorm Warning	BYZ	Carter, Custer, Fallon	60 min
Aug 3, 11:09 PM MDT	Severe Thunderstorm Warning	BYZ	Powder River, Rosebud	66 min
Aug 3, 11:28 PM MDT	Severe Thunderstorm Warning	BYZ	Carter, Powder River	62 min
Aug 4, 12:27 AM MDT	Severe Thunderstorm Warning	BYZ	Carter, Powder River	63 min
Aug 4, 1:27 AM MDT	Severe Thunderstorm Warning	BYZ	Carter	48 min
Aug 5, 4:23 PM MDT	Severe Thunderstorm Warning	BYZ	Carter	67 min
Aug 5, 4:50 PM MDT	Severe Thunderstorm Warning	BYZ	Carter	25 min
Aug 5, 4:55 PM MDT	Severe Thunderstorm Warning	BYZ	Custer, Powder River	65 min
Aug 5, 5:03 PM MDT	Severe Thunderstorm Warning	BYZ	Powder River	57 min
Aug 5, 5:23 PM MDT	Severe Thunderstorm Warning	BYZ	Carter	33 min
Aug 5, 5:45 PM MDT	Severe Thunderstorm Warning	BYZ	Powder River	60 min
Aug 5, 5:55 PM MDT	Severe Thunderstorm Warning	BYZ	Carter, Powder River	30 min
Aug 5, 6:05 PM MDT	Severe Thunderstorm Warning	BYZ	Powder River	55 min
Aug 5, 6:51 PM MDT	Severe Thunderstorm Warning	BYZ	Carter, Powder River	46 min
Aug 5, 7:04 PM MDT	Severe Thunderstorm Warning	BYZ	Musselshell, Rosebud	56 min
Aug 5, 7:37 PM MDT	Severe Thunderstorm Warning	BYZ	Rosebud, Treasure	53 min
Aug 5, 8:21 PM MDT	Severe Thunderstorm Warning	BYZ	Rosebud, Treasure	54 min
Aug 7, 4:33 PM MDT	Severe Thunderstorm Warning	TFX	Cascade, Chouteau	27 min
Aug 7, 8:43 PM MDT	Severe Thunderstorm Warning	TFX	Blaine	47 min
Aug 8, 2:52 PM MDT	Severe Thunderstorm Warning	TFX	Beaverhead, Gallatin, Madison	53 min
Aug 8, 3:43 PM MDT	Severe Thunderstorm Warning	TFX	Gallatin, Madison	47 min
Aug 8, 4:29 PM MDT	Severe Thunderstorm Warning	TFX	Gallatin	46 min
Aug 8, 4:36 PM MDT	Severe Thunderstorm Warning	BYZ	Park	54 min
Aug 8, 5:01 PM MDT	Severe Thunderstorm Warning	TFX	Cascade	44 min
Aug 8, 5:54 PM MDT	Severe Thunderstorm Warning	TFX	Chouteau	36 min
Aug 8, 6:22 PM MDT	Severe Thunderstorm Warning	TFX	Blaine, Hill	53 min
Aug 9, 11:45 AM MDT	Severe Thunderstorm Warning	MSO	Granite, Missoula, Ravalli	30 min
Aug 9, 12:15 PM MDT	Severe Thunderstorm Warning	MSO	Granite, Missoula, Ravalli	16 min
Aug 9, 12:32 PM MDT	Severe Thunderstorm Warning	MSO	Granite, Missoula, Powell	28 min
Aug 9, 12:40 PM MDT	Severe Thunderstorm Warning	TFX	Beaverhead, Madison	65 min
Aug 9, 1:15 PM MDT	Severe Thunderstorm Warning	TFX	Gallatin, Madison	46 min
Aug 9, 1:42 PM MDT	Severe Thunderstorm Warning	TFX	Beaverhead	63 min
Aug 9, 2:00 PM MDT	Severe Thunderstorm Warning	TFX	Cascade, Lewis and Clark	45 min
Aug 9, 2:13 PM MDT	Severe Thunderstorm Warning	BYZ	Park	60 min
Aug 9, 2:33 PM MDT	Severe Thunderstorm Warning	TFX	Lewis and Clark	42 min
Aug 9, 2:34 PM MDT	Severe Thunderstorm Warning	TFX	Gallatin, Madison	56 min
Aug 9, 2:52 PM MDT	Severe Thunderstorm Warning	TFX	Cascade, Teton	38 min
Aug 9, 2:54 PM MDT	Severe Thunderstorm Warning	TFX	Beaverhead	66 min
Aug 9, 3:00 PM MDT	Severe Thunderstorm Warning	TFX	Pondera, Teton	45 min
Aug 9, 3:31 PM MDT	Severe Thunderstorm Warning	TFX	Glacier, Pondera, Toole	59 min
Aug 9, 3:35 PM MDT	Severe Thunderstorm Warning	TFX	Cascade, Chouteau, Liberty, Pondera, Teton, Toole	55 min
Aug 9, 3:59 PM MDT	Severe Thunderstorm Warning	TFX	Beaverhead, Madison	46 min
Aug 9, 4:05 PM MDT	Severe Thunderstorm Warning	TFX	Blaine	55 min
Aug 9, 4:44 PM MDT	Severe Thunderstorm Warning	TFX	Gallatin, Madison	61 min
Aug 9, 5:11 PM MDT	Severe Thunderstorm Warning	TFX	Beaverhead	49 min
Aug 9, 5:30 PM MDT	Severe Thunderstorm Warning	MSO	Granite, Missoula, Powell	45 min
Aug 9, 5:51 PM MDT	Severe Thunderstorm Warning	TFX	Blaine, Hill	54 min
Aug 9, 5:51 PM MDT	Severe Thunderstorm Warning	TFX	Madison	39 min
Aug 9, 5:59 PM MDT	Severe Thunderstorm Warning	GGW	Phillips	49 min
Aug 9, 6:06 PM MDT	Severe Thunderstorm Warning	TFX	Blaine	54 min
Aug 9, 6:30 PM MDT	Severe Thunderstorm Warning	TFX	Gallatin, Madison	60 min
Aug 9, 6:38 PM MDT	Severe Thunderstorm Warning	GGW	Garfield, Phillips, Valley	67 min
Aug 9, 6:48 PM MDT	Severe Thunderstorm Warning	TFX	Blaine, Hill	57 min
Aug 9, 7:05 PM MDT	Severe Thunderstorm Warning	GGW	Garfield, Petroleum, Phillips	34 min
Aug 9, 7:38 PM MDT	Severe Thunderstorm Warning	GGW	Garfield	67 min
Aug 9, 8:30 PM MDT	Severe Thunderstorm Warning	GGW	Garfield	29 min
Aug 9, 9:57 PM MDT	Severe Thunderstorm Warning	GGW	Garfield, McCone, Prairie	48 min
Aug 9, 11:53 PM MDT	Severe Thunderstorm Warning	TFX	Gallatin	15 min
Aug 10, 1:00 PM MDT	Severe Thunderstorm Warning	BYZ	Carter	60 min
Aug 10, 1:58 PM MDT	Severe Thunderstorm Warning	BYZ	Carter	31 min
Aug 10, 2:54 PM MDT	Severe Thunderstorm Warning	BYZ	Carter, Powder River	64 min
Aug 10, 3:34 PM MDT	Severe Thunderstorm Warning	GGW	Wibaux	43 min
Aug 10, 3:55 PM MDT	Severe Thunderstorm Warning	GGW	Daniels, Valley	65 min
Aug 10, 4:06 PM MDT	Severe Thunderstorm Warning	BYZ	Custer, Powder River	44 min
Aug 10, 4:34 PM MDT	Severe Thunderstorm Warning	GGW	Richland	56 min
Aug 10, 5:27 PM MDT	Severe Thunderstorm Warning	GGW	Richland	53 min
Aug 10, 5:45 PM MDT	Severe Thunderstorm Warning	GGW	Daniels, Sheridan	50 min
Aug 10, 6:25 PM MDT	Severe Thunderstorm Warning	GGW	Sheridan	65 min
Aug 10, 6:53 PM MDT	Severe Thunderstorm Warning	GGW	Daniels, Roosevelt, Sheridan	67 min
Aug 10, 7:33 PM MDT	Severe Thunderstorm Warning	GGW	Roosevelt, Sheridan	57 min
Aug 10, 8:26 PM MDT	Severe Thunderstorm Warning	GGW	Roosevelt, Sheridan	27 min
Aug 10, 9:26 PM MDT	Severe Thunderstorm Warning	GGW	Valley	64 min
Aug 11, 12:45 AM MDT	Severe Thunderstorm Warning	GGW	Daniels, Roosevelt, Valley	39 min
Aug 19, 1:30 PM MDT	Severe Thunderstorm Warning	MSO	Missoula, Sanders	30 min
Aug 19, 2:00 PM MDT	Severe Thunderstorm Warning	TFX	Lewis and Clark	45 min
Aug 19, 2:03 PM MDT	Severe Thunderstorm Warning	MSO	Lake, Missoula, Sanders	42 min
Aug 19, 2:32 PM MDT	Severe Thunderstorm Warning	TFX	Glacier	43 min
Aug 19, 5:47 PM MDT	Severe Thunderstorm Warning	TFX	Blaine, Hill	58 min
Aug 19, 6:47 PM MDT	Severe Thunderstorm Warning	MSO	Granite, Missoula, Powell	43 min
Aug 21, 4:38 PM MDT	Severe Thunderstorm Warning	GGW	Richland	20 min
Aug 21, 8:00 PM MDT	Severe Thunderstorm Warning	GGW	Dawson, Prairie, Wibaux	60 min
Aug 30, 11:48 PM MDT	Severe Thunderstorm Warning	MSO	Deer Lodge, Granite, Powell	42 min
Aug 31, 12:07 AM MDT	Severe Thunderstorm Warning	TFX	Cascade, Chouteau, Teton	38 min
Aug 31, 12:24 AM MDT	Severe Thunderstorm Warning	MSO	Deer Lodge, Granite, Powell	25 min
Aug 31, 12:48 AM MDT	Severe Thunderstorm Warning	TFX	Chouteau, Liberty, Pondera, Teton	42 min
Aug 31, 3:53 AM MDT	Severe Thunderstorm Warning	MSO	Deer Lodge, Powell	41 min
Aug 31, 2:07 PM MDT	Severe Thunderstorm Warning	MSO	Powell, Silver Bow	8 min
Aug 31, 3:19 PM MDT	Severe Thunderstorm Warning	MSO	Deer Lodge, Powell	13 min
Aug 31, 3:37 PM MDT	Severe Thunderstorm Warning	TFX	Beaverhead	38 min
Aug 31, 3:49 PM MDT	Severe Thunderstorm Warning	MSO	Silver Bow	41 min
Aug 31, 4:01 PM MDT	Severe Thunderstorm Warning	TFX	Cascade, Judith Basin, Meagher	44 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 2007 2009

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.