Alert archive / Montana / Severe Thunderstorm Warnings
Severe Thunderstorm Warnings in Montana, 1998
382 severe thunderstorm warnings in 1998. 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 1998. Tap one for its archive.
- Severe Thunderstorm Warnings
- 382
- Busiest month
- July229 severe thunderstorm warnings
- Busiest day
- July 5, 199849 severe thunderstorm warnings
Over time
By month
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 |
|---|---|---|---|---|
| May 20, 6:26 PM MDT | Severe Thunderstorm Warning | MSO | Flathead | 44 min |
| May 20, 7:24 PM MDT | Severe Thunderstorm Warning | BYZ | Custer | 61 min |
| May 21, 2:42 PM MDT | Severe Thunderstorm Warning | BYZ | Big Horn | 63 min |
| May 21, 3:15 PM MDT | Severe Thunderstorm Warning | BYZ | Treasure | 50 min |
| May 21, 4:02 PM MDT | Severe Thunderstorm Warning | BYZ | Treasure | 63 min |
| May 22, 3:42 PM MDT | Severe Thunderstorm Warning | TFX | Pondera, Teton | 58 min |
| May 22, 4:03 PM MDT | Severe Thunderstorm Warning | TFX | Chouteau, Fergus | 47 min |
| May 25, 3:56 PM MDT | Severe Thunderstorm Warning | MSO | Missoula | 59 min |
| May 25, 5:51 PM MDT | Severe Thunderstorm Warning | MSO | Missoula | 64 min |
| May 26, 4:05 PM MDT | Severe Thunderstorm Warning | MSO | Granite | 30 min |
| May 26, 4:28 PM MDT | Severe Thunderstorm Warning | MSO | Missoula | 32 min |
| May 26, 4:53 PM MDT | Severe Thunderstorm Warning | MSO | Missoula | 32 min |
| May 26, 5:18 PM MDT | Severe Thunderstorm Warning | MSO | Sanders | 47 min |
| May 26, 8:06 PM MDT | Severe Thunderstorm Warning | MSO | Lincoln | 64 min |
| May 27, 12:33 PM MDT | Severe Thunderstorm Warning | GGW | Valley | 47 min |
| May 29, 7:44 PM MDT | Severe Thunderstorm Warning | BYZ | Golden Valley, Musselshell | 61 min |
| May 30, 11:14 AM MDT | Severe Thunderstorm Warning | BYZ | Powder River, Rosebud | 61 min |
| May 30, 12:18 PM MDT | Severe Thunderstorm Warning | BYZ | Carter | 62 min |
| May 30, 12:56 PM MDT | Severe Thunderstorm Warning | BYZ | Carter | 59 min |
| Jun 1, 2:30 PM MDT | Severe Thunderstorm Warning | TFX | Cascade | 60 min |
| Jun 10, 5:19 PM MDT | Severe Thunderstorm Warning | GGW | Garfield | 61 min |
| Jun 13, 8:47 PM MDT | Severe Thunderstorm Warning | BYZ | Yellowstone | 63 min |
| Jun 13, 9:16 PM MDT | Severe Thunderstorm Warning | BYZ | Big Horn | 64 min |
| Jun 18, 8:40 PM MDT | Severe Thunderstorm Warning | MSO | Granite | 50 min |
| Jun 22, 4:39 PM MDT | Severe Thunderstorm Warning | TFX | Chouteau | 61 min |
| Jun 23, 11:54 AM MDT | Severe Thunderstorm Warning | TFX | Fergus | 51 min |
| Jun 23, 1:00 PM MDT | Severe Thunderstorm Warning | GGW | Petroleum | 55 min |
| Jun 23, 1:52 PM MDT | Severe Thunderstorm Warning | GGW | Valley | 63 min |
| Jun 23, 2:02 PM MDT | Severe Thunderstorm Warning | GGW | Garfield | 63 min |
| Jun 23, 3:06 PM MDT | Severe Thunderstorm Warning | GGW | Garfield | 64 min |
| Jun 23, 3:19 PM MDT | Severe Thunderstorm Warning | BYZ | Carter | 61 min |
| Jun 23, 3:25 PM MDT | Severe Thunderstorm Warning | BYZ | Custer | 65 min |
| Jun 23, 3:33 PM MDT | Severe Thunderstorm Warning | BYZ | Fallon | 62 min |
| Jun 23, 4:40 PM MDT | Severe Thunderstorm Warning | BYZ | Fallon | 50 min |
| Jun 23, 4:53 PM MDT | Severe Thunderstorm Warning | BYZ | Custer | 62 min |
| Jun 23, 5:27 PM MDT | Severe Thunderstorm Warning | BYZ | Fallon | 63 min |
| Jun 23, 6:23 PM MDT | Severe Thunderstorm Warning | GGW | Roosevelt | 62 min |
| Jun 23, 6:27 PM MDT | Severe Thunderstorm Warning | GGW | Daniels | 63 min |
| Jun 23, 6:40 PM MDT | Severe Thunderstorm Warning | GGW | Dawson | 60 min |
| Jun 23, 6:47 PM MDT | Severe Thunderstorm Warning | GGW | Richland | 63 min |
| Jun 23, 7:35 PM MDT | Severe Thunderstorm Warning | GGW | Valley | 60 min |
| Jun 23, 7:50 PM MDT | Severe Thunderstorm Warning | GGW | Roosevelt | 60 min |
| Jun 23, 8:51 PM MDT | Severe Thunderstorm Warning | GGW | Roosevelt | 64 min |
| Jun 30, 2:15 PM MDT | Severe Thunderstorm Warning | TFX | Lewis and Clark | 60 min |
| Jun 30, 4:23 PM MDT | Severe Thunderstorm Warning | TFX | Cascade, Lewis and Clark | 57 min |
| Jun 30, 5:12 PM MDT | Severe Thunderstorm Warning | TFX | Meagher | 48 min |
| Jun 30, 8:26 PM MDT | Severe Thunderstorm Warning | BYZ | Wheatland | 59 min |
| Jun 30, 9:14 PM MDT | Severe Thunderstorm Warning | BYZ | Golden Valley, Stillwater, Sweet Grass | 61 min |
| Jun 30, 11:05 PM MDT | Severe Thunderstorm Warning | MSO | Granite, Ravalli | 65 min |
| Jul 1, 2:10 PM MDT | Severe Thunderstorm Warning | TFX | Judith Basin | 35 min |
| Jul 1, 2:59 PM MDT | Severe Thunderstorm Warning | TFX | Fergus | 31 min |
| Jul 1, 3:29 PM MDT | Severe Thunderstorm Warning | TFX | Fergus | 36 min |
| Jul 1, 3:47 PM MDT | Severe Thunderstorm Warning | GGW | Phillips | 63 min |
| Jul 1, 4:05 PM MDT | Severe Thunderstorm Warning | TFX | Fergus | 50 min |
| Jul 1, 4:20 PM MDT | Severe Thunderstorm Warning | BYZ | Park, Sweet Grass | 60 min |
| Jul 1, 5:11 PM MDT | Severe Thunderstorm Warning | GGW | Petroleum | 59 min |
| Jul 1, 5:13 PM MDT | Severe Thunderstorm Warning | BYZ | Stillwater | 62 min |
| Jul 1, 5:42 PM MDT | Severe Thunderstorm Warning | BYZ | Wheatland | 63 min |
| Jul 1, 5:52 PM MDT | Severe Thunderstorm Warning | BYZ | Musselshell | 63 min |
| Jul 1, 6:10 PM MDT | Severe Thunderstorm Warning | GGW | Valley | 60 min |
| Jul 1, 6:18 PM MDT | Severe Thunderstorm Warning | BYZ | Carbon, Stillwater, Yellowstone | 62 min |
| Jul 1, 6:35 PM MDT | Severe Thunderstorm Warning | BYZ | Powder River | 50 min |
| Jul 1, 7:14 PM MDT | Severe Thunderstorm Warning | BYZ | Carter | 61 min |
| Jul 1, 7:18 PM MDT | Severe Thunderstorm Warning | BYZ | Yellowstone | 47 min |
| Jul 1, 7:28 PM MDT | Severe Thunderstorm Warning | BYZ | Powder River | 62 min |
| Jul 1, 7:59 PM MDT | Severe Thunderstorm Warning | GGW | Garfield | 61 min |
| Jul 1, 8:11 PM MDT | Severe Thunderstorm Warning | BYZ | Rosebud | 64 min |
| Jul 1, 9:41 PM MDT | Severe Thunderstorm Warning | BYZ | Custer | 64 min |
| Jul 1, 11:19 PM MDT | Severe Thunderstorm Warning | BYZ | Carter | 61 min |
| Jul 2, 6:10 PM MDT | Severe Thunderstorm Warning | MSO | Ravalli | 45 min |
| Jul 2, 8:28 PM MDT | Severe Thunderstorm Warning | TFX | Broadwater, Jefferson | 47 min |
| Jul 2, 9:02 PM MDT | Severe Thunderstorm Warning | TFX | Gallatin | 58 min |
| Jul 3, 3:14 PM MDT | Severe Thunderstorm Warning | MSO | Mineral, Missoula | 46 min |
| Jul 3, 3:39 PM MDT | Severe Thunderstorm Warning | MSO | Mineral, Missoula | 61 min |
| Jul 3, 4:19 PM MDT | Severe Thunderstorm Warning | MSO | Lake, Missoula, Sanders | 61 min |
| Jul 3, 5:20 PM MDT | Severe Thunderstorm Warning | MSO | Granite, Missoula, Powell | 45 min |
| Jul 3, 6:18 PM MDT | Severe Thunderstorm Warning | TFX | Pondera | 32 min |
| Jul 3, 6:21 PM MDT | Severe Thunderstorm Warning | MSO | Deer Lodge, Powell | 49 min |
| Jul 3, 6:33 PM MDT | Severe Thunderstorm Warning | TFX | Lewis and Clark | 32 min |
| Jul 3, 6:56 PM MDT | Severe Thunderstorm Warning | TFX | Jefferson | 34 min |
| Jul 3, 7:10 PM MDT | Severe Thunderstorm Warning | TFX | Glacier | 35 min |
| Jul 3, 7:22 PM MDT | Severe Thunderstorm Warning | TFX | Cascade, Lewis and Clark | 43 min |
| Jul 3, 7:48 PM MDT | Severe Thunderstorm Warning | TFX | Cascade | 47 min |
| Jul 3, 7:57 PM MDT | Severe Thunderstorm Warning | TFX | Chouteau, Teton | 48 min |
| Jul 3, 8:01 PM MDT | Severe Thunderstorm Warning | TFX | Lewis and Clark | 59 min |
| Jul 3, 8:06 PM MDT | Severe Thunderstorm Warning | TFX | Meagher | 29 min |
| Jul 3, 8:09 PM MDT | Severe Thunderstorm Warning | TFX | Fergus, Judith Basin | 61 min |
| Jul 3, 8:16 PM MDT | Severe Thunderstorm Warning | TFX | Liberty, Pondera, Toole | 64 min |
| Jul 3, 8:32 PM MDT | Severe Thunderstorm Warning | MSO | Powell | 33 min |
| Jul 3, 8:36 PM MDT | Severe Thunderstorm Warning | TFX | Cascade, Chouteau, Teton | 49 min |
| Jul 3, 8:36 PM MDT | Severe Thunderstorm Warning | TFX | Liberty, Pondera, Toole | 49 min |
| Jul 3, 8:39 PM MDT | Severe Thunderstorm Warning | TFX | Fergus, Judith Basin, Meagher | 51 min |
| Jul 3, 9:06 PM MDT | Severe Thunderstorm Warning | TFX | Broadwater, Jefferson | 49 min |
| Jul 3, 9:26 PM MDT | Severe Thunderstorm Warning | TFX | Chouteau, Fergus, Hill, Judith Basin, Liberty | 49 min |
| Jul 3, 9:30 PM MDT | Severe Thunderstorm Warning | TFX | Broadwater, Meagher | 50 min |
| Jul 3, 10:03 PM MDT | Severe Thunderstorm Warning | BYZ | Powder River | 62 min |
| Jul 3, 10:06 PM MDT | Severe Thunderstorm Warning | GGW | Phillips | 64 min |
| Jul 3, 10:07 PM MDT | Severe Thunderstorm Warning | TFX | Chouteau, Fergus, Judith Basin | 58 min |
| Jul 3, 10:07 PM MDT | Severe Thunderstorm Warning | TFX | Blaine, Hill | 58 min |
| Jul 3, 10:40 PM MDT | Severe Thunderstorm Warning | TFX | Meagher | 50 min |
| Jul 3, 10:55 PM MDT | Severe Thunderstorm Warning | GGW | Garfield | 65 min |
| Jul 3, 11:09 PM MDT | Severe Thunderstorm Warning | GGW | Phillips | 61 min |
| Jul 3, 11:10 PM MDT | Severe Thunderstorm Warning | TFX | Judith Basin | 60 min |
| Jul 4, 12:15 AM MDT | Severe Thunderstorm Warning | TFX | Judith Basin | 45 min |
| Jul 4, 1:00 AM MDT | Severe Thunderstorm Warning | GGW | Phillips | 65 min |
| Jul 4, 1:43 AM MDT | Severe Thunderstorm Warning | GGW | Valley | 62 min |
| Jul 4, 2:52 AM MDT | Severe Thunderstorm Warning | GGW | Valley | 58 min |
| Jul 4, 2:42 PM MDT | Severe Thunderstorm Warning | TFX | Judith Basin | 63 min |
| Jul 4, 4:04 PM MDT | Severe Thunderstorm Warning | TFX | Gallatin, Madison | 61 min |
| Jul 4, 4:27 PM MDT | Severe Thunderstorm Warning | TFX | Fergus | 63 min |
| Jul 4, 4:47 PM MDT | Severe Thunderstorm Warning | TFX | Gallatin | 48 min |
| Jul 4, 4:54 PM MDT | Severe Thunderstorm Warning | GGW | Daniels | 61 min |
| Jul 4, 5:11 PM MDT | Severe Thunderstorm Warning | GGW | Valley | 64 min |
| Jul 4, 5:18 PM MDT | Severe Thunderstorm Warning | BYZ | Park, Sweet Grass | 47 min |
| Jul 4, 5:25 PM MDT | Severe Thunderstorm Warning | TFX | Cascade | 60 min |
| Jul 4, 5:29 PM MDT | Severe Thunderstorm Warning | TFX | Fergus | 51 min |
| Jul 4, 5:47 PM MDT | Severe Thunderstorm Warning | GGW | Daniels | 63 min |
| Jul 4, 5:47 PM MDT | Severe Thunderstorm Warning | TFX | Meagher | 63 min |
| Jul 4, 5:50 PM MDT | Severe Thunderstorm Warning | GGW | Petroleum | 65 min |
| Jul 4, 6:00 PM MDT | Severe Thunderstorm Warning | TFX | Toole | 65 min |
| Jul 4, 6:05 PM MDT | Severe Thunderstorm Warning | TFX | Pondera, Teton | 65 min |
| Jul 4, 6:09 PM MDT | Severe Thunderstorm Warning | MSO | Missoula | 31 min |
| Jul 4, 6:16 PM MDT | Severe Thunderstorm Warning | BYZ | Wheatland | 59 min |
| Jul 4, 6:32 PM MDT | Severe Thunderstorm Warning | GGW | Roosevelt | 63 min |
| Jul 4, 7:05 PM MDT | Severe Thunderstorm Warning | TFX | Chouteau, Pondera | 60 min |
| Jul 4, 7:06 PM MDT | Severe Thunderstorm Warning | BYZ | Carter | 64 min |
| Jul 4, 7:12 PM MDT | Severe Thunderstorm Warning | TFX | Toole | 58 min |
| Jul 4, 7:23 PM MDT | Severe Thunderstorm Warning | BYZ | Custer | 62 min |
| Jul 4, 8:10 PM MDT | Severe Thunderstorm Warning | BYZ | Golden Valley, Stillwater, Yellowstone | 60 min |
| Jul 4, 8:10 PM MDT | Severe Thunderstorm Warning | BYZ | Musselshell | 60 min |
| Jul 4, 8:19 PM MDT | Severe Thunderstorm Warning | GGW | Roosevelt | 61 min |
| Jul 4, 8:20 PM MDT | Severe Thunderstorm Warning | MSO | Sanders | 60 min |
| Jul 4, 8:21 PM MDT | Severe Thunderstorm Warning | BYZ | Custer | 64 min |
| Jul 4, 8:28 PM MDT | Severe Thunderstorm Warning | GGW | Richland | 62 min |
| Jul 4, 8:39 PM MDT | Severe Thunderstorm Warning | GGW | McCone | 66 min |
| Jul 4, 8:43 PM MDT | Severe Thunderstorm Warning | GGW | Prairie | 62 min |
| Jul 4, 9:19 PM MDT | Severe Thunderstorm Warning | MSO | Flathead, Sanders | 46 min |
| Jul 4, 9:20 PM MDT | Severe Thunderstorm Warning | GGW | Roosevelt | 50 min |
| Jul 4, 9:22 PM MDT | Severe Thunderstorm Warning | BYZ | Custer | 58 min |
| Jul 4, 9:22 PM MDT | Severe Thunderstorm Warning | GGW | Dawson | 63 min |
| Jul 4, 9:25 PM MDT | Severe Thunderstorm Warning | GGW | Richland | 65 min |
| Jul 4, 9:31 PM MDT | Severe Thunderstorm Warning | TFX | Glacier, Toole | 64 min |
| Jul 4, 9:41 PM MDT | Severe Thunderstorm Warning | BYZ | Yellowstone | 59 min |
| Jul 4, 9:49 PM MDT | Severe Thunderstorm Warning | BYZ | Rosebud | 61 min |
| Jul 4, 9:55 PM MDT | Severe Thunderstorm Warning | BYZ | Big Horn | 60 min |
| Jul 4, 10:00 PM MDT | Severe Thunderstorm Warning | GGW | Valley | 65 min |
| Jul 4, 10:24 PM MDT | Severe Thunderstorm Warning | BYZ | Custer | 61 min |
| Jul 4, 10:49 PM MDT | Severe Thunderstorm Warning | BYZ | Rosebud | 61 min |
| Jul 4, 10:56 PM MDT | Severe Thunderstorm Warning | BYZ | Big Horn, Treasure | 64 min |
| Jul 5, 1:00 PM MDT | Severe Thunderstorm Warning | GGW | Daniels | 65 min |
| Jul 5, 2:01 PM MDT | Severe Thunderstorm Warning | GGW | Daniels | 64 min |
| Jul 5, 3:45 PM MDT | Severe Thunderstorm Warning | TFX | Teton | 60 min |
| Jul 5, 3:47 PM MDT | Severe Thunderstorm Warning | GGW | Phillips | 63 min |
| Jul 5, 4:15 PM MDT | Severe Thunderstorm Warning | TFX | Toole | 45 min |
| Jul 5, 4:17 PM MDT | Severe Thunderstorm Warning | BYZ | Big Horn | 63 min |
| Jul 5, 4:45 PM MDT | Severe Thunderstorm Warning | BYZ | Powder River, Rosebud | 65 min |
| Jul 5, 4:48 PM MDT | Severe Thunderstorm Warning | GGW | Phillips | 47 min |
| Jul 5, 4:50 PM MDT | Severe Thunderstorm Warning | TFX | Teton | 60 min |
| Jul 5, 4:53 PM MDT | Severe Thunderstorm Warning | GGW | Roosevelt | 62 min |
| Jul 5, 5:00 PM MDT | Severe Thunderstorm Warning | TFX | Liberty, Toole | 65 min |
| Jul 5, 5:01 PM MDT | Severe Thunderstorm Warning | BYZ | Big Horn, Yellowstone | 64 min |
| Jul 5, 5:05 PM MDT | Severe Thunderstorm Warning | GGW | Valley | 65 min |
| Jul 5, 5:15 PM MDT | Severe Thunderstorm Warning | BYZ | Big Horn | 65 min |
| Jul 5, 5:26 PM MDT | Severe Thunderstorm Warning | BYZ | Powder River | 64 min |
| Jul 5, 5:37 PM MDT | Severe Thunderstorm Warning | TFX | Chouteau | 63 min |
| Jul 5, 5:49 PM MDT | Severe Thunderstorm Warning | BYZ | Powder River | 66 min |
| Jul 5, 5:49 PM MDT | Severe Thunderstorm Warning | GGW | Roosevelt | 66 min |
| Jul 5, 5:55 PM MDT | Severe Thunderstorm Warning | BYZ | Stillwater | 65 min |
| Jul 5, 6:00 PM MDT | Severe Thunderstorm Warning | TFX | Hill | 60 min |
| Jul 5, 6:05 PM MDT | Severe Thunderstorm Warning | TFX | Liberty | 25 min |
| Jul 5, 6:19 PM MDT | Severe Thunderstorm Warning | BYZ | Big Horn | 61 min |
| Jul 5, 6:35 PM MDT | Severe Thunderstorm Warning | BYZ | Carbon, Yellowstone | 60 min |
| Jul 5, 6:40 PM MDT | Severe Thunderstorm Warning | TFX | Chouteau | 65 min |
| Jul 5, 6:43 PM MDT | Severe Thunderstorm Warning | GGW | Daniels | 47 min |
| Jul 5, 7:02 PM MDT | Severe Thunderstorm Warning | TFX | Hill | 63 min |
| Jul 5, 7:16 PM MDT | Severe Thunderstorm Warning | BYZ | Big Horn, Yellowstone | 64 min |
| Jul 5, 7:19 PM MDT | Severe Thunderstorm Warning | BYZ | Yellowstone | 61 min |
| Jul 5, 7:21 PM MDT | Severe Thunderstorm Warning | GGW | Daniels | 64 min |
| Jul 5, 7:30 PM MDT | Severe Thunderstorm Warning | BYZ | Powder River | 65 min |
| Jul 5, 7:36 PM MDT | Severe Thunderstorm Warning | GGW | Roosevelt | 64 min |
| Jul 5, 7:38 PM MDT | Severe Thunderstorm Warning | GGW | Sheridan | 62 min |
| Jul 5, 7:50 PM MDT | Severe Thunderstorm Warning | BYZ | Big Horn, Treasure, Yellowstone | 65 min |
| Jul 5, 8:00 PM MDT | Severe Thunderstorm Warning | TFX | Blaine | 65 min |
| Jul 5, 8:15 PM MDT | Severe Thunderstorm Warning | GGW | Valley | 65 min |
| Jul 5, 8:29 PM MDT | Severe Thunderstorm Warning | BYZ | Big Horn | 61 min |
| Jul 5, 8:33 PM MDT | Severe Thunderstorm Warning | GGW | Roosevelt | 62 min |
| Jul 5, 8:55 PM MDT | Severe Thunderstorm Warning | BYZ | Rosebud, Treasure | 60 min |
| Jul 5, 9:09 PM MDT | Severe Thunderstorm Warning | GGW | Sheridan | 66 min |
| Jul 5, 9:29 PM MDT | Severe Thunderstorm Warning | GGW | Roosevelt | 46 min |
| Jul 5, 9:30 PM MDT | Severe Thunderstorm Warning | BYZ | Big Horn | 65 min |
| Jul 5, 9:52 PM MDT | Severe Thunderstorm Warning | BYZ | Custer, Rosebud | 63 min |
| Jul 5, 10:04 PM MDT | Severe Thunderstorm Warning | TFX | Fergus | 56 min |
| Jul 5, 10:57 PM MDT | Severe Thunderstorm Warning | TFX | Blaine, Fergus | 63 min |
| Jul 6, 10:58 AM MDT | Severe Thunderstorm Warning | GGW | Valley | 62 min |
| Jul 6, 11:23 AM MDT | Severe Thunderstorm Warning | GGW | McCone | 62 min |
| Jul 6, 1:48 PM MDT | Severe Thunderstorm Warning | GGW | Valley | 67 min |
| Jul 6, 1:56 PM MDT | Severe Thunderstorm Warning | GGW | Richland | 64 min |
| Jul 6, 2:50 PM MDT | Severe Thunderstorm Warning | GGW | Daniels | 65 min |
| Jul 6, 3:22 PM MDT | Severe Thunderstorm Warning | GGW | McCone | 63 min |
| Jul 6, 3:31 PM MDT | Severe Thunderstorm Warning | GGW | Prairie | 64 min |
| Jul 6, 3:35 PM MDT | Severe Thunderstorm Warning | GGW | Valley | 65 min |
| Jul 6, 3:56 PM MDT | Severe Thunderstorm Warning | BYZ | Carter | 49 min |
| Jul 6, 4:02 PM MDT | Severe Thunderstorm Warning | GGW | Dawson | 63 min |
| Jul 6, 4:10 PM MDT | Severe Thunderstorm Warning | GGW | Richland | 65 min |
| Jul 6, 4:40 PM MDT | Severe Thunderstorm Warning | GGW | Valley | 60 min |
| Jul 6, 4:44 PM MDT | Severe Thunderstorm Warning | GGW | Dawson | 61 min |
| Jul 6, 4:56 PM MDT | Severe Thunderstorm Warning | GGW | Prairie | 49 min |
| Jul 6, 5:16 PM MDT | Severe Thunderstorm Warning | BYZ | Custer, Fallon | 64 min |
| Jul 6, 6:22 PM MDT | Severe Thunderstorm Warning | BYZ | Fallon | 23 min |
| Jul 8, 1:22 PM MDT | Severe Thunderstorm Warning | GGW | Roosevelt | 63 min |
| Jul 8, 2:17 PM MDT | Severe Thunderstorm Warning | TFX | Glacier, Pondera | 43 min |
| Jul 8, 2:41 PM MDT | Severe Thunderstorm Warning | TFX | Teton | 59 min |
| Jul 8, 3:33 PM MDT | Severe Thunderstorm Warning | GGW | Daniels | 62 min |
| Jul 8, 3:42 PM MDT | Severe Thunderstorm Warning | TFX | Teton | 58 min |
| Jul 9, 12:10 AM MDT | Severe Thunderstorm Warning | GGW | Valley | 60 min |
| Jul 9, 6:30 AM MDT | Severe Thunderstorm Warning | MSO | Lincoln, Sanders | 60 min |
| Jul 9, 3:35 PM MDT | Severe Thunderstorm Warning | GGW | Garfield | 55 min |
| Jul 9, 6:10 PM MDT | Severe Thunderstorm Warning | GGW | Wibaux | 60 min |
| Jul 10, 12:49 AM MDT | Severe Thunderstorm Warning | MSO | Lincoln | 66 min |
| Jul 10, 4:31 PM MDT | Severe Thunderstorm Warning | BYZ | Yellowstone | 64 min |
| Jul 10, 4:54 PM MDT | Severe Thunderstorm Warning | TFX | Pondera, Teton | 61 min |
| Jul 10, 5:16 PM MDT | Severe Thunderstorm Warning | MSO | Missoula | 64 min |
| Jul 10, 5:19 PM MDT | Severe Thunderstorm Warning | TFX | Chouteau | 61 min |
| Jul 10, 5:44 PM MDT | Severe Thunderstorm Warning | TFX | Cascade | 31 min |
| Jul 10, 5:49 PM MDT | Severe Thunderstorm Warning | MSO | Granite, Missoula | 31 min |
| Jul 10, 6:02 PM MDT | Severe Thunderstorm Warning | MSO | Lake, Missoula, Sanders | 33 min |
| Jul 10, 6:16 PM MDT | Severe Thunderstorm Warning | MSO | Granite, Missoula | 34 min |
| Jul 10, 6:25 PM MDT | Severe Thunderstorm Warning | TFX | Cascade | 35 min |
| Jul 10, 6:47 PM MDT | Severe Thunderstorm Warning | GGW | Petroleum | 63 min |
| Jul 10, 6:54 PM MDT | Severe Thunderstorm Warning | MSO | Lake, Missoula | 61 min |
| Jul 10, 7:29 PM MDT | Severe Thunderstorm Warning | TFX | Fergus | 36 min |
| Jul 11, 1:09 PM MDT | Severe Thunderstorm Warning | GGW | Richland | 46 min |
| Jul 11, 2:29 PM MDT | Severe Thunderstorm Warning | TFX | Madison | 61 min |
| Jul 11, 3:05 PM MDT | Severe Thunderstorm Warning | BYZ | Big Horn, Yellowstone | 65 min |
| Jul 11, 3:30 PM MDT | Severe Thunderstorm Warning | TFX | Gallatin | 65 min |
| Jul 11, 3:45 PM MDT | Severe Thunderstorm Warning | BYZ | Park | 65 min |
| Jul 11, 4:03 PM MDT | Severe Thunderstorm Warning | BYZ | Big Horn | 62 min |
| Jul 11, 5:06 PM MDT | Severe Thunderstorm Warning | BYZ | Big Horn | 64 min |
| Jul 11, 5:43 PM MDT | Severe Thunderstorm Warning | TFX | Fergus | 47 min |
| Jul 11, 6:03 PM MDT | Severe Thunderstorm Warning | BYZ | Rosebud | 47 min |
| Jul 11, 6:37 PM MDT | Severe Thunderstorm Warning | BYZ | Powder River | 63 min |
| Jul 11, 6:42 PM MDT | Severe Thunderstorm Warning | GGW | Garfield | 63 min |
| Jul 11, 7:45 PM MDT | Severe Thunderstorm Warning | GGW | McCone | 65 min |
| Jul 11, 7:55 PM MDT | Severe Thunderstorm Warning | GGW | Valley | 60 min |
| Jul 11, 8:23 PM MDT | Severe Thunderstorm Warning | GGW | Roosevelt | 62 min |
| Jul 11, 9:02 PM MDT | Severe Thunderstorm Warning | GGW | Richland | 63 min |
| Jul 11, 9:07 PM MDT | Severe Thunderstorm Warning | GGW | Roosevelt | 93 min |
| Jul 13, 7:37 PM MDT | Severe Thunderstorm Warning | TFX | Fergus | 48 min |
| Jul 13, 7:39 PM MDT | Severe Thunderstorm Warning | BYZ | Wheatland | 61 min |
| Jul 13, 7:47 PM MDT | Severe Thunderstorm Warning | BYZ | Yellowstone | 63 min |
| Jul 13, 8:18 PM MDT | Severe Thunderstorm Warning | GGW | Sheridan | 47 min |
| Jul 13, 11:31 PM MDT | Severe Thunderstorm Warning | GGW | Wibaux | 64 min |
| Jul 14, 12:05 AM MDT | Severe Thunderstorm Warning | BYZ | Carter, Fallon | 45 min |
| Jul 14, 12:15 AM MDT | Severe Thunderstorm Warning | GGW | Richland | 60 min |
| Jul 18, 5:04 PM MDT | Severe Thunderstorm Warning | BYZ | Carter | 31 min |
| Jul 18, 6:47 PM MDT | Severe Thunderstorm Warning | GGW | Valley | 48 min |
| Jul 18, 7:21 PM MDT | Severe Thunderstorm Warning | GGW | Roosevelt | 64 min |
| Jul 18, 7:32 PM MDT | Severe Thunderstorm Warning | GGW | Valley | 48 min |
| Jul 19, 6:51 PM MDT | Severe Thunderstorm Warning | BYZ | Carter, Powder River | 59 min |
| Jul 22, 7:38 PM MDT | Severe Thunderstorm Warning | MSO | Mineral | 47 min |
| Jul 22, 7:54 PM MDT | Severe Thunderstorm Warning | MSO | Sanders | 46 min |
| Jul 27, 4:47 PM MDT | Severe Thunderstorm Warning | BYZ | Yellowstone | 63 min |
| Jul 27, 5:23 PM MDT | Severe Thunderstorm Warning | BYZ | Golden Valley, Musselshell | 62 min |
| Jul 27, 5:40 PM MDT | Severe Thunderstorm Warning | BYZ | Big Horn | 65 min |
| Jul 27, 5:59 PM MDT | Severe Thunderstorm Warning | BYZ | Musselshell | 61 min |
| Jul 28, 1:52 PM MDT | Severe Thunderstorm Warning | MSO | Lake, Missoula | 63 min |
| Jul 28, 2:31 PM MDT | Severe Thunderstorm Warning | MSO | Lincoln | 59 min |
| Jul 28, 3:26 PM MDT | Severe Thunderstorm Warning | MSO | Flathead | 59 min |
| Jul 30, 2:09 PM MDT | Severe Thunderstorm Warning | MSO | Mineral | 46 min |
| Jul 31, 3:37 PM MDT | Severe Thunderstorm Warning | BYZ | Big Horn, Yellowstone | 63 min |
| Jul 31, 4:10 PM MDT | Severe Thunderstorm Warning | BYZ | Park | 65 min |
| Jul 31, 4:23 PM MDT | Severe Thunderstorm Warning | BYZ | Yellowstone | 62 min |
| Jul 31, 4:37 PM MDT | Severe Thunderstorm Warning | BYZ | Sweet Grass | 63 min |
| Jul 31, 5:33 PM MDT | Severe Thunderstorm Warning | BYZ | Big Horn | 62 min |
| Jul 31, 5:53 PM MDT | Severe Thunderstorm Warning | BYZ | Golden Valley, Musselshell | 62 min |
| Jul 31, 6:00 PM MDT | Severe Thunderstorm Warning | BYZ | Big Horn, Rosebud | 65 min |
| Jul 31, 6:25 PM MDT | Severe Thunderstorm Warning | MSO | Missoula | 60 min |
| Jul 31, 7:05 PM MDT | Severe Thunderstorm Warning | BYZ | Powder River, Rosebud | 60 min |
| Jul 31, 8:00 PM MDT | Severe Thunderstorm Warning | BYZ | Custer, Powder River | 60 min |
| Aug 1, 2:33 PM MDT | Severe Thunderstorm Warning | GGW | Phillips | 47 min |
| Aug 1, 5:18 PM MDT | Severe Thunderstorm Warning | BYZ | Carter | 62 min |
| Aug 1, 5:45 PM MDT | Severe Thunderstorm Warning | GGW | Valley | 60 min |
| Aug 1, 6:14 PM MDT | Severe Thunderstorm Warning | GGW | Roosevelt | 61 min |
| Aug 1, 6:14 PM MDT | Severe Thunderstorm Warning | TFX | Blaine | 31 min |
| Aug 1, 6:35 PM MDT | Severe Thunderstorm Warning | GGW | Richland | 65 min |
| Aug 1, 7:41 PM MDT | Severe Thunderstorm Warning | GGW | Daniels | 64 min |
| Aug 1, 7:57 PM MDT | Severe Thunderstorm Warning | GGW | Sheridan | 63 min |
| Aug 7, 12:15 AM MDT | Severe Thunderstorm Warning | MSO | Missoula, Ravalli | 60 min |
| Aug 7, 2:33 PM MDT | Severe Thunderstorm Warning | MSO | Deer Lodge | 47 min |
| Aug 7, 2:42 PM MDT | Severe Thunderstorm Warning | BYZ | Golden Valley | 63 min |
| Aug 7, 3:29 PM MDT | Severe Thunderstorm Warning | BYZ | Musselshell | 61 min |
| Aug 7, 3:43 PM MDT | Severe Thunderstorm Warning | MSO | Powell | 47 min |
| Aug 7, 3:54 PM MDT | Severe Thunderstorm Warning | TFX | Broadwater, Jefferson, Lewis and Clark | 46 min |
| Aug 7, 4:10 PM MDT | Severe Thunderstorm Warning | TFX | Cascade, Teton | 35 min |
| Aug 7, 4:19 PM MDT | Severe Thunderstorm Warning | TFX | Pondera | 51 min |
| Aug 7, 4:31 PM MDT | Severe Thunderstorm Warning | MSO | Powell | 34 min |
| Aug 7, 4:33 PM MDT | Severe Thunderstorm Warning | BYZ | Rosebud, Treasure, Yellowstone | 62 min |
| Aug 7, 4:45 PM MDT | Severe Thunderstorm Warning | TFX | Cascade, Chouteau, Teton | 45 min |
| Aug 7, 4:51 PM MDT | Severe Thunderstorm Warning | TFX | Lewis and Clark | 49 min |
| Aug 7, 4:57 PM MDT | Severe Thunderstorm Warning | TFX | Pondera, Toole | 48 min |
| Aug 7, 5:19 PM MDT | Severe Thunderstorm Warning | TFX | Liberty, Toole | 36 min |
| Aug 7, 5:25 PM MDT | Severe Thunderstorm Warning | TFX | Chouteau | 50 min |
| Aug 7, 5:39 PM MDT | Severe Thunderstorm Warning | TFX | Broadwater, Meagher | 51 min |
| Aug 7, 5:39 PM MDT | Severe Thunderstorm Warning | TFX | Jefferson | 51 min |
| Aug 7, 5:48 PM MDT | Severe Thunderstorm Warning | TFX | Liberty | 42 min |
| Aug 9, 5:06 PM MDT | Severe Thunderstorm Warning | BYZ | Yellowstone | 59 min |
| Aug 10, 1:30 PM MDT | Severe Thunderstorm Warning | GGW | McCone | 65 min |
| Aug 10, 1:42 PM MDT | Severe Thunderstorm Warning | BYZ | Powder River | 63 min |
| Aug 10, 2:02 PM MDT | Severe Thunderstorm Warning | GGW | Richland | 63 min |
| Aug 10, 2:07 PM MDT | Severe Thunderstorm Warning | GGW | Roosevelt | 63 min |
| Aug 10, 3:04 PM MDT | Severe Thunderstorm Warning | BYZ | Custer | 61 min |
| Aug 10, 3:07 PM MDT | Severe Thunderstorm Warning | GGW | Dawson, Richland | 63 min |
| Aug 10, 3:11 PM MDT | Severe Thunderstorm Warning | GGW | Roosevelt | 64 min |
| Aug 10, 3:43 PM MDT | Severe Thunderstorm Warning | GGW | Dawson | 62 min |
| Aug 10, 3:46 PM MDT | Severe Thunderstorm Warning | GGW | Daniels | 64 min |
| Aug 10, 5:57 PM MDT | Severe Thunderstorm Warning | BYZ | Big Horn | 63 min |
| Aug 13, 6:40 PM MDT | Severe Thunderstorm Warning | GGW | McCone | 60 min |
| Aug 14, 3:09 AM MDT | Severe Thunderstorm Warning | GGW | Richland, Roosevelt | 61 min |
| Aug 14, 5:29 PM MDT | Severe Thunderstorm Warning | BYZ | Wheatland | 61 min |
| Aug 14, 7:29 PM MDT | Severe Thunderstorm Warning | BYZ | Musselshell | 66 min |
| Aug 14, 11:44 PM MDT | Severe Thunderstorm Warning | GGW | McCone | 61 min |
| Aug 15, 12:49 AM MDT | Severe Thunderstorm Warning | GGW | McCone | 66 min |
| Aug 15, 3:42 PM MDT | Severe Thunderstorm Warning | BYZ | Stillwater | 33 min |
| Aug 15, 4:12 PM MDT | Severe Thunderstorm Warning | BYZ | Yellowstone | 63 min |
| Aug 16, 5:57 PM MDT | Severe Thunderstorm Warning | TFX | Blaine, Fergus | 68 min |
| Aug 16, 7:00 PM MDT | Severe Thunderstorm Warning | GGW | Phillips | 65 min |
| Aug 16, 8:21 PM MDT | Severe Thunderstorm Warning | TFX | Blaine | 49 min |
| Aug 17, 8:41 PM MDT | Severe Thunderstorm Warning | GGW | Valley | 64 min |
| Aug 17, 10:12 PM MDT | Severe Thunderstorm Warning | GGW | Daniels, Valley | 63 min |
| Aug 20, 3:57 PM MDT | Severe Thunderstorm Warning | BYZ | Carter | 63 min |
| Aug 20, 4:16 PM MDT | Severe Thunderstorm Warning | BYZ | Custer, Fallon | 64 min |
| Aug 20, 5:32 PM MDT | Severe Thunderstorm Warning | MSO | Mineral | 63 min |
| Aug 20, 6:08 PM MDT | Severe Thunderstorm Warning | BYZ | Carter | 32 min |
| Aug 20, 6:25 PM MDT | Severe Thunderstorm Warning | MSO | Sanders | 60 min |
| Aug 20, 7:14 PM MDT | Severe Thunderstorm Warning | BYZ | Big Horn | 66 min |
| Aug 20, 8:21 PM MDT | Severe Thunderstorm Warning | BYZ | Big Horn | 64 min |
| Aug 20, 8:48 PM MDT | Severe Thunderstorm Warning | BYZ | Powder River | 62 min |
| Aug 20, 10:19 PM MDT | Severe Thunderstorm Warning | MSO | Sanders | 61 min |
| Aug 21, 4:23 AM MDT | Severe Thunderstorm Warning | TFX | Blaine | 47 min |
| Aug 21, 6:15 PM MDT | Severe Thunderstorm Warning | GGW | Sheridan | 60 min |
| Aug 21, 7:32 PM MDT | Severe Thunderstorm Warning | GGW | Sheridan | 58 min |
| Aug 21, 7:40 PM MDT | Severe Thunderstorm Warning | TFX | Chouteau | 30 min |
| Aug 22, 1:09 AM MDT | Severe Thunderstorm Warning | GGW | McCone, Valley | 61 min |
| Aug 22, 1:37 AM MDT | Severe Thunderstorm Warning | MSO | Lake, Missoula | 58 min |
| Aug 22, 3:33 PM MDT | Severe Thunderstorm Warning | BYZ | Big Horn | 62 min |
| Aug 22, 4:03 PM MDT | Severe Thunderstorm Warning | BYZ | Rosebud | 62 min |
| Aug 22, 4:35 PM MDT | Severe Thunderstorm Warning | GGW | Dawson, Wibaux | 65 min |
| Aug 22, 5:05 PM MDT | Severe Thunderstorm Warning | BYZ | Powder River, Rosebud | 60 min |
| Aug 22, 5:11 PM MDT | Severe Thunderstorm Warning | BYZ | Treasure | 64 min |
| Aug 22, 5:39 PM MDT | Severe Thunderstorm Warning | BYZ | Powder River | 46 min |
| Aug 22, 6:01 PM MDT | Severe Thunderstorm Warning | BYZ | Carter | 64 min |
| Aug 22, 6:39 PM MDT | Severe Thunderstorm Warning | BYZ | Fallon | 61 min |
| Aug 22, 6:46 PM MDT | Severe Thunderstorm Warning | BYZ | Custer | 64 min |
| Aug 22, 6:58 PM MDT | Severe Thunderstorm Warning | GGW | Prairie | 62 min |
| Aug 22, 7:07 PM MDT | Severe Thunderstorm Warning | BYZ | Carter | 33 min |
| Aug 23, 4:17 PM MDT | Severe Thunderstorm Warning | TFX | Cascade | 58 min |
| Aug 23, 5:01 PM MDT | Severe Thunderstorm Warning | TFX | Cascade | 59 min |
| Aug 23, 5:08 PM MDT | Severe Thunderstorm Warning | TFX | Chouteau, Fergus, Judith Basin | 62 min |
| Aug 23, 8:19 PM MDT | Severe Thunderstorm Warning | BYZ | Musselshell, Yellowstone | 61 min |
| Aug 23, 9:01 PM MDT | Severe Thunderstorm Warning | BYZ | Rosebud, Treasure | 64 min |
| Aug 23, 9:21 PM MDT | Severe Thunderstorm Warning | BYZ | Musselshell, Yellowstone | 64 min |
| Aug 23, 10:20 PM MDT | Severe Thunderstorm Warning | BYZ | Rosebud | 65 min |
| Aug 23, 10:30 PM MDT | Severe Thunderstorm Warning | BYZ | Big Horn, Yellowstone | 60 min |
| Aug 23, 10:56 PM MDT | Severe Thunderstorm Warning | BYZ | Treasure | 64 min |
| Aug 23, 11:05 PM MDT | Severe Thunderstorm Warning | BYZ | Custer | 60 min |
| Aug 23, 11:55 PM MDT | Severe Thunderstorm Warning | BYZ | Fallon | 65 min |
| Aug 24, 12:07 AM MDT | Severe Thunderstorm Warning | BYZ | Carter, Custer | 63 min |
| Aug 26, 4:44 PM MDT | Severe Thunderstorm Warning | GGW | Dawson | 61 min |
| Aug 26, 6:58 PM MDT | Severe Thunderstorm Warning | BYZ | Carter | 62 min |
| Aug 26, 7:01 PM MDT | Severe Thunderstorm Warning | GGW | Richland | 64 min |
| Aug 26, 8:05 PM MDT | Severe Thunderstorm Warning | GGW | Richland | 50 min |
| Sep 9, 2:03 PM MDT | Severe Thunderstorm Warning | TFX | Cascade, Chouteau, Judith Basin, Meagher | 62 min |
| Sep 9, 2:03 PM MDT | Severe Thunderstorm Warning | TFX | Teton | 62 min |
| Sep 9, 3:04 PM MDT | Severe Thunderstorm Warning | TFX | Chouteau, Hill | 46 min |
| Sep 9, 3:50 PM MDT | Severe Thunderstorm Warning | TFX | Blaine, Hill | 60 min |
| Sep 9, 3:50 PM MDT | Severe Thunderstorm Warning | TFX | Liberty | 60 min |
| Sep 10, 4:05 PM MDT | Severe Thunderstorm Warning | BYZ | Custer, Powder River, Rosebud | 60 min |
| Sep 18, 2:32 PM MDT | Severe Thunderstorm Warning | TFX | Gallatin | 33 min |
| Sep 18, 2:49 PM MDT | Severe Thunderstorm Warning | TFX | Judith Basin | 51 min |
| Sep 18, 3:35 PM MDT | Severe Thunderstorm Warning | TFX | Chouteau, Teton | 50 min |
| Sep 18, 4:37 PM MDT | Severe Thunderstorm Warning | TFX | Chouteau, Liberty | 38 min |
| Sep 18, 8:00 PM MDT | Severe Thunderstorm Warning | GGW | Prairie | 65 min |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Big Horn County24
- Valley County22
- Yellowstone County22
- Roosevelt County19
- Chouteau County18
- Fergus County18
- Missoula County18
- Custer County17
- Powder River County17
- Carter County17
- Rosebud County16
- Richland County14
- Teton County13
- Cascade County13
- Daniels County12
- Judith Basin County11
- Pondera County10
- Musselshell County10
- Treasure County9
- Sanders County9
- Fallon County9
- Liberty County9
- Toole County9
- McCone County9
- Dawson County8
- Meagher County8
- Phillips County8
- Blaine County8
- Garfield County7
- Lewis and Clark County7
- Granite County6
- Golden Valley County6
- Stillwater County6
- Hill County6
- Sheridan County6
- Wheatland County5
- Broadwater County5
- Jefferson County5
- Gallatin County5
- Mineral County5
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordThe radar archive19971999
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.