Alert archive / Montana / Severe Thunderstorm Warnings
Severe Thunderstorm Warnings in Montana, 1999
335 severe thunderstorm warnings in 1999. 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 1999. Tap one for its archive.
- Severe Thunderstorm Warnings
- 335
- Busiest month
- June110 severe thunderstorm warnings
- Busiest day
- August 15, 199940 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 |
|---|---|---|---|---|
| Apr 9, 2:42 PM MDT | Severe Thunderstorm Warning | BYZ | Rosebud | 63 min |
| Apr 9, 3:47 PM MDT | Severe Thunderstorm Warning | BYZ | Rosebud | 63 min |
| Apr 28, 5:06 PM MDT | Severe Thunderstorm Warning | BYZ | Carbon | 64 min |
| Apr 28, 5:55 PM MDT | Severe Thunderstorm Warning | BYZ | Rosebud, Treasure | 65 min |
| Apr 28, 6:28 PM MDT | Severe Thunderstorm Warning | GGW | Garfield | 62 min |
| Apr 28, 7:35 PM MDT | Severe Thunderstorm Warning | GGW | Garfield | 60 min |
| Apr 28, 7:39 PM MDT | Severe Thunderstorm Warning | BYZ | Yellowstone | 61 min |
| May 13, 6:51 PM MDT | Severe Thunderstorm Warning | BYZ | Powder River | 64 min |
| May 13, 7:32 PM MDT | Severe Thunderstorm Warning | BYZ | Carter | 63 min |
| May 21, 2:36 PM MDT | Severe Thunderstorm Warning | BYZ | Carbon | 64 min |
| May 21, 2:48 PM MDT | Severe Thunderstorm Warning | BYZ | Yellowstone | 62 min |
| May 21, 3:52 PM MDT | Severe Thunderstorm Warning | BYZ | Big Horn, Yellowstone | 63 min |
| May 21, 7:06 PM MDT | Severe Thunderstorm Warning | GGW | Daniels, Sheridan | 64 min |
| May 29, 4:44 PM MDT | Severe Thunderstorm Warning | BYZ | Custer, Fallon | 46 min |
| May 29, 4:57 PM MDT | Severe Thunderstorm Warning | BYZ | Carter | 53 min |
| May 29, 5:01 PM MDT | Severe Thunderstorm Warning | GGW | Prairie | 49 min |
| May 29, 5:34 PM MDT | Severe Thunderstorm Warning | BYZ | Fallon | 46 min |
| Jun 2, 3:49 PM MDT | Severe Thunderstorm Warning | TFX | Cascade, Chouteau | 31 min |
| Jun 2, 4:37 PM MDT | Severe Thunderstorm Warning | BYZ | Park | 63 min |
| Jun 2, 5:26 PM MDT | Severe Thunderstorm Warning | BYZ | Yellowstone | 64 min |
| Jun 2, 5:30 PM MDT | Severe Thunderstorm Warning | TFX | Chouteau, Liberty | 30 min |
| Jun 2, 7:38 PM MDT | Severe Thunderstorm Warning | TFX | Judith Basin, Meagher | 47 min |
| Jun 2, 7:55 PM MDT | Severe Thunderstorm Warning | TFX | Chouteau, Liberty | 35 min |
| Jun 7, 6:22 PM MDT | Severe Thunderstorm Warning | BYZ | Treasure | 38 min |
| Jun 7, 6:28 PM MDT | Severe Thunderstorm Warning | BYZ | Powder River | 47 min |
| Jun 7, 6:41 PM MDT | Severe Thunderstorm Warning | BYZ | Rosebud | 44 min |
| Jun 7, 8:49 PM MDT | Severe Thunderstorm Warning | BYZ | Golden Valley, Musselshell | 56 min |
| Jun 8, 10:17 AM MDT | Severe Thunderstorm Warning | GGW | Prairie | 63 min |
| Jun 8, 10:31 AM MDT | Severe Thunderstorm Warning | GGW | Prairie | 64 min |
| Jun 8, 10:59 AM MDT | Severe Thunderstorm Warning | GGW | Dawson | 41 min |
| Jun 8, 3:12 PM MDT | Severe Thunderstorm Warning | GGW | Richland | 48 min |
| Jun 8, 3:18 PM MDT | Severe Thunderstorm Warning | BYZ | Carter | 47 min |
| Jun 11, 12:24 PM MDT | Severe Thunderstorm Warning | GGW | Garfield | 61 min |
| Jun 11, 1:31 PM MDT | Severe Thunderstorm Warning | BYZ | Rosebud | 64 min |
| Jun 11, 2:52 PM MDT | Severe Thunderstorm Warning | BYZ | Rosebud | 63 min |
| Jun 11, 3:29 PM MDT | Severe Thunderstorm Warning | BYZ | Custer | 61 min |
| Jun 11, 4:29 PM MDT | Severe Thunderstorm Warning | BYZ | Custer | 61 min |
| Jun 12, 5:51 PM MDT | Severe Thunderstorm Warning | BYZ | Stillwater | 59 min |
| Jun 12, 6:32 PM MDT | Severe Thunderstorm Warning | BYZ | Carbon | 58 min |
| Jun 17, 1:28 PM MDT | Severe Thunderstorm Warning | BYZ | Musselshell | 62 min |
| Jun 18, 4:11 PM MDT | Severe Thunderstorm Warning | TFX | Beaverhead | 34 min |
| Jun 18, 4:37 PM MDT | Severe Thunderstorm Warning | TFX | Cascade, Lewis and Clark | 38 min |
| Jun 18, 4:44 PM MDT | Severe Thunderstorm Warning | MSO | Deer Lodge, Powell | 31 min |
| Jun 18, 4:54 PM MDT | Severe Thunderstorm Warning | TFX | Lewis and Clark | 36 min |
| Jun 18, 5:39 PM MDT | Severe Thunderstorm Warning | TFX | Cascade | 36 min |
| Jun 18, 6:57 PM MDT | Severe Thunderstorm Warning | TFX | Meagher | 33 min |
| Jun 18, 7:09 PM MDT | Severe Thunderstorm Warning | TFX | Fergus, Judith Basin | 36 min |
| Jun 18, 8:01 PM MDT | Severe Thunderstorm Warning | BYZ | Wheatland | 34 min |
| Jun 18, 8:29 PM MDT | Severe Thunderstorm Warning | BYZ | Golden Valley | 46 min |
| Jun 18, 8:42 PM MDT | Severe Thunderstorm Warning | BYZ | Stillwater | 33 min |
| Jun 18, 8:44 PM MDT | Severe Thunderstorm Warning | TFX | Gallatin | 31 min |
| Jun 18, 9:01 PM MDT | Severe Thunderstorm Warning | BYZ | Yellowstone | 39 min |
| Jun 18, 9:12 PM MDT | Severe Thunderstorm Warning | BYZ | Musselshell | 33 min |
| Jun 19, 3:44 PM MDT | Severe Thunderstorm Warning | TFX | Fergus | 46 min |
| Jun 19, 4:14 PM MDT | Severe Thunderstorm Warning | GGW | McCone | 61 min |
| Jun 19, 4:22 PM MDT | Severe Thunderstorm Warning | BYZ | Stillwater | 63 min |
| Jun 19, 4:40 PM MDT | Severe Thunderstorm Warning | GGW | Roosevelt | 65 min |
| Jun 19, 4:47 PM MDT | Severe Thunderstorm Warning | GGW | Richland | 63 min |
| Jun 19, 4:54 PM MDT | Severe Thunderstorm Warning | TFX | Gallatin | 36 min |
| Jun 19, 5:32 PM MDT | Severe Thunderstorm Warning | BYZ | Golden Valley | 63 min |
| Jun 19, 5:45 PM MDT | Severe Thunderstorm Warning | GGW | Roosevelt | 60 min |
| Jun 19, 6:49 PM MDT | Severe Thunderstorm Warning | GGW | Daniels, Sheridan | 66 min |
| Jun 19, 6:52 PM MDT | Severe Thunderstorm Warning | BYZ | Park | 33 min |
| Jun 19, 7:00 PM MDT | Severe Thunderstorm Warning | TFX | Fergus | 30 min |
| Jun 19, 7:04 PM MDT | Severe Thunderstorm Warning | TFX | Fergus, Judith Basin | 26 min |
| Jun 19, 7:32 PM MDT | Severe Thunderstorm Warning | TFX | Fergus, Judith Basin | 43 min |
| Jun 19, 7:48 PM MDT | Severe Thunderstorm Warning | BYZ | Powder River | 62 min |
| Jun 19, 7:49 PM MDT | Severe Thunderstorm Warning | GGW | Petroleum | 61 min |
| Jun 19, 8:13 PM MDT | Severe Thunderstorm Warning | TFX | Fergus | 47 min |
| Jun 19, 9:00 PM MDT | Severe Thunderstorm Warning | TFX | Fergus | 30 min |
| Jun 19, 9:06 PM MDT | Severe Thunderstorm Warning | BYZ | Carter | 64 min |
| Jun 19, 10:30 PM MDT | Severe Thunderstorm Warning | GGW | McCone, Valley | 60 min |
| Jun 19, 11:12 PM MDT | Severe Thunderstorm Warning | GGW | Roosevelt | 63 min |
| Jun 20, 1:26 PM MDT | Severe Thunderstorm Warning | GGW | Roosevelt | 64 min |
| Jun 20, 5:06 PM MDT | Severe Thunderstorm Warning | GGW | Dawson | 59 min |
| Jun 20, 5:10 PM MDT | Severe Thunderstorm Warning | GGW | Richland | 65 min |
| Jun 20, 6:15 PM MDT | Severe Thunderstorm Warning | GGW | Richland | 65 min |
| Jun 20, 6:17 PM MDT | Severe Thunderstorm Warning | GGW | Wibaux | 63 min |
| Jun 20, 7:07 PM MDT | Severe Thunderstorm Warning | GGW | Dawson | 63 min |
| Jun 20, 7:21 PM MDT | Severe Thunderstorm Warning | GGW | Wibaux | 64 min |
| Jun 20, 8:21 PM MDT | Severe Thunderstorm Warning | GGW | Wibaux | 64 min |
| Jun 21, 2:52 PM MDT | Severe Thunderstorm Warning | TFX | Gallatin | 33 min |
| Jun 21, 4:31 PM MDT | Severe Thunderstorm Warning | TFX | Judith Basin | 29 min |
| Jun 21, 4:45 PM MDT | Severe Thunderstorm Warning | BYZ | Musselshell, Yellowstone | 65 min |
| Jun 21, 4:56 PM MDT | Severe Thunderstorm Warning | TFX | Fergus, Judith Basin | 64 min |
| Jun 21, 4:57 PM MDT | Severe Thunderstorm Warning | BYZ | Wheatland | 48 min |
| Jun 21, 5:05 PM MDT | Severe Thunderstorm Warning | BYZ | Rosebud | 65 min |
| Jun 21, 5:05 PM MDT | Severe Thunderstorm Warning | TFX | Fergus | 25 min |
| Jun 21, 5:08 PM MDT | Severe Thunderstorm Warning | GGW | Petroleum | 62 min |
| Jun 21, 5:32 PM MDT | Severe Thunderstorm Warning | GGW | Garfield | 63 min |
| Jun 21, 5:41 PM MDT | Severe Thunderstorm Warning | GGW | Phillips | 64 min |
| Jun 21, 5:50 PM MDT | Severe Thunderstorm Warning | TFX | Fergus | 25 min |
| Jun 21, 6:07 PM MDT | Severe Thunderstorm Warning | BYZ | Rosebud | 63 min |
| Jun 21, 6:12 PM MDT | Severe Thunderstorm Warning | GGW | Petroleum | 63 min |
| Jun 21, 6:32 PM MDT | Severe Thunderstorm Warning | GGW | Garfield | 63 min |
| Jun 21, 6:38 PM MDT | Severe Thunderstorm Warning | GGW | Phillips | 62 min |
| Jun 21, 6:51 PM MDT | Severe Thunderstorm Warning | GGW | Valley | 59 min |
| Jun 21, 6:56 PM MDT | Severe Thunderstorm Warning | GGW | McCone | 64 min |
| Jun 21, 7:01 PM MDT | Severe Thunderstorm Warning | GGW | Prairie | 64 min |
| Jun 21, 7:17 PM MDT | Severe Thunderstorm Warning | GGW | Phillips | 63 min |
| Jun 21, 7:52 PM MDT | Severe Thunderstorm Warning | GGW | Daniels, Roosevelt | 63 min |
| Jun 21, 8:30 PM MDT | Severe Thunderstorm Warning | GGW | McCone, Richland | 60 min |
| Jun 21, 8:44 PM MDT | Severe Thunderstorm Warning | GGW | Sheridan | 61 min |
| Jun 21, 8:55 PM MDT | Severe Thunderstorm Warning | GGW | Daniels | 35 min |
| Jun 24, 4:41 PM MDT | Severe Thunderstorm Warning | TFX | Broadwater, Lewis and Clark, Meagher | 34 min |
| Jun 24, 5:15 PM MDT | Severe Thunderstorm Warning | TFX | Cascade, Meagher | 30 min |
| Jun 24, 5:48 PM MDT | Severe Thunderstorm Warning | MSO | Flathead, Lake, Sanders | 42 min |
| Jun 24, 6:30 PM MDT | Severe Thunderstorm Warning | MSO | Flathead, Lake | 45 min |
| Jun 24, 7:15 PM MDT | Severe Thunderstorm Warning | MSO | Flathead | 45 min |
| Jun 24, 7:50 PM MDT | Severe Thunderstorm Warning | MSO | Granite, Missoula, Ravalli | 40 min |
| Jun 24, 8:23 PM MDT | Severe Thunderstorm Warning | MSO | Granite, Missoula, Powell | 52 min |
| Jun 24, 8:23 PM MDT | Severe Thunderstorm Warning | MSO | Ravalli | 52 min |
| Jun 24, 9:17 PM MDT | Severe Thunderstorm Warning | MSO | Missoula, Powell | 28 min |
| Jun 25, 2:50 AM MDT | Severe Thunderstorm Warning | TFX | Lewis and Clark | 60 min |
| Jun 25, 3:14 AM MDT | Severe Thunderstorm Warning | TFX | Cascade | 31 min |
| Jun 25, 3:24 AM MDT | Severe Thunderstorm Warning | GGW | Valley | 66 min |
| Jun 25, 3:25 AM MDT | Severe Thunderstorm Warning | TFX | Chouteau | 65 min |
| Jun 25, 4:30 AM MDT | Severe Thunderstorm Warning | GGW | Valley | 35 min |
| Jun 25, 4:42 AM MDT | Severe Thunderstorm Warning | GGW | Daniels | 63 min |
| Jun 25, 5:05 AM MDT | Severe Thunderstorm Warning | GGW | Valley | 60 min |
| Jun 25, 3:33 PM MDT | Severe Thunderstorm Warning | BYZ | Powder River | 47 min |
| Jun 25, 4:24 PM MDT | Severe Thunderstorm Warning | BYZ | Custer, Powder River | 26 min |
| Jun 25, 4:37 PM MDT | Severe Thunderstorm Warning | BYZ | Carter | 63 min |
| Jun 25, 5:19 PM MDT | Severe Thunderstorm Warning | BYZ | Powder River | 46 min |
| Jun 25, 5:44 PM MDT | Severe Thunderstorm Warning | BYZ | Carter | 31 min |
| Jun 25, 7:11 PM MDT | Severe Thunderstorm Warning | BYZ | Custer | 19 min |
| Jun 27, 7:55 PM MDT | Severe Thunderstorm Warning | TFX | Chouteau | 35 min |
| Jul 1, 10:44 PM MDT | Severe Thunderstorm Warning | BYZ | Powder River | 36 min |
| Jul 1, 11:07 PM MDT | Severe Thunderstorm Warning | BYZ | Carter | 43 min |
| Jul 3, 12:52 AM MDT | Severe Thunderstorm Warning | BYZ | Treasure | 33 min |
| Jul 3, 1:15 AM MDT | Severe Thunderstorm Warning | BYZ | Rosebud | 50 min |
| Jul 3, 1:48 AM MDT | Severe Thunderstorm Warning | BYZ | Custer | 57 min |
| Jul 3, 2:26 AM MDT | Severe Thunderstorm Warning | BYZ | Fallon | 59 min |
| Jul 3, 11:59 PM MDT | Severe Thunderstorm Warning | GGW | Wibaux | 61 min |
| Jul 4, 1:11 AM MDT | Severe Thunderstorm Warning | BYZ | Fallon | 34 min |
| Jul 4, 9:40 PM MDT | Severe Thunderstorm Warning | BYZ | Fallon | 65 min |
| Jul 4, 10:17 PM MDT | Severe Thunderstorm Warning | BYZ | Carter | 63 min |
| Jul 7, 4:44 PM MDT | Severe Thunderstorm Warning | BYZ | Custer | 66 min |
| Jul 7, 5:13 PM MDT | Severe Thunderstorm Warning | BYZ | Powder River | 62 min |
| Jul 7, 5:29 PM MDT | Severe Thunderstorm Warning | GGW | Phillips | 56 min |
| Jul 7, 5:45 PM MDT | Severe Thunderstorm Warning | BYZ | Carter | 65 min |
| Jul 7, 6:24 PM MDT | Severe Thunderstorm Warning | GGW | Phillips, Valley | 61 min |
| Jul 7, 6:37 PM MDT | Severe Thunderstorm Warning | BYZ | Powder River | 33 min |
| Jul 7, 6:47 PM MDT | Severe Thunderstorm Warning | TFX | Hill | 28 min |
| Jul 7, 6:57 PM MDT | Severe Thunderstorm Warning | BYZ | Carter | 48 min |
| Jul 7, 7:23 PM MDT | Severe Thunderstorm Warning | GGW | Valley | 57 min |
| Jul 7, 7:41 PM MDT | Severe Thunderstorm Warning | GGW | Garfield, McCone | 64 min |
| Jul 7, 8:46 PM MDT | Severe Thunderstorm Warning | GGW | McCone | 49 min |
| Jul 7, 9:26 PM MDT | Severe Thunderstorm Warning | GGW | Dawson | 64 min |
| Jul 7, 10:29 PM MDT | Severe Thunderstorm Warning | GGW | Richland | 56 min |
| Jul 12, 5:29 PM MDT | Severe Thunderstorm Warning | GGW | Daniels, Valley | 66 min |
| Jul 12, 6:07 PM MDT | Severe Thunderstorm Warning | GGW | Richland, Roosevelt | 63 min |
| Jul 12, 6:48 PM MDT | Severe Thunderstorm Warning | GGW | Roosevelt | 62 min |
| Jul 12, 7:09 PM MDT | Severe Thunderstorm Warning | GGW | Richland | 66 min |
| Jul 12, 7:47 PM MDT | Severe Thunderstorm Warning | GGW | Roosevelt | 63 min |
| Jul 12, 8:05 PM MDT | Severe Thunderstorm Warning | GGW | Richland | 65 min |
| Jul 13, 2:31 PM MDT | Severe Thunderstorm Warning | GGW | Daniels | 79 min |
| Jul 14, 4:41 PM MDT | Severe Thunderstorm Warning | TFX | Chouteau, Hill | 49 min |
| Jul 14, 6:23 PM MDT | Severe Thunderstorm Warning | BYZ | Rosebud | 62 min |
| Jul 14, 7:25 PM MDT | Severe Thunderstorm Warning | BYZ | Custer, Rosebud | 60 min |
| Jul 15, 4:27 PM MDT | Severe Thunderstorm Warning | BYZ | Carbon, Stillwater | 48 min |
| Jul 15, 5:20 PM MDT | Severe Thunderstorm Warning | BYZ | Big Horn, Carbon | 60 min |
| Jul 17, 5:08 PM MDT | Severe Thunderstorm Warning | BYZ | Big Horn, Treasure | 62 min |
| Jul 17, 5:35 PM MDT | Severe Thunderstorm Warning | MSO | Missoula | 25 min |
| Jul 17, 7:23 PM MDT | Severe Thunderstorm Warning | GGW | Garfield, Valley | 62 min |
| Jul 17, 7:57 PM MDT | Severe Thunderstorm Warning | BYZ | Big Horn | 33 min |
| Jul 18, 5:43 PM MDT | Severe Thunderstorm Warning | GGW | Garfield | 62 min |
| Jul 18, 6:12 PM MDT | Severe Thunderstorm Warning | BYZ | Rosebud | 33 min |
| Jul 18, 6:56 PM MDT | Severe Thunderstorm Warning | GGW | McCone | 64 min |
| Jul 18, 8:02 PM MDT | Severe Thunderstorm Warning | GGW | McCone | 63 min |
| Jul 19, 5:40 AM MDT | Severe Thunderstorm Warning | GGW | Dawson, Wibaux | 65 min |
| Jul 19, 2:46 PM MDT | Severe Thunderstorm Warning | GGW | Dawson | 64 min |
| Jul 19, 3:13 PM MDT | Severe Thunderstorm Warning | BYZ | Powder River | 47 min |
| Jul 19, 3:46 PM MDT | Severe Thunderstorm Warning | GGW | Dawson | 64 min |
| Jul 19, 4:48 PM MDT | Severe Thunderstorm Warning | GGW | Dawson | 62 min |
| Jul 19, 5:39 PM MDT | Severe Thunderstorm Warning | BYZ | Powder River | 61 min |
| Jul 19, 5:44 PM MDT | Severe Thunderstorm Warning | TFX | Fergus | 31 min |
| Jul 19, 5:51 PM MDT | Severe Thunderstorm Warning | GGW | Dawson | 64 min |
| Jul 19, 6:51 PM MDT | Severe Thunderstorm Warning | TFX | Fergus | 29 min |
| Jul 19, 7:20 PM MDT | Severe Thunderstorm Warning | TFX | Fergus | 30 min |
| Jul 19, 9:05 PM MDT | Severe Thunderstorm Warning | GGW | Roosevelt, Sheridan | 65 min |
| Jul 20, 12:17 AM MDT | Severe Thunderstorm Warning | BYZ | Rosebud, Treasure | 63 min |
| Jul 20, 1:40 PM MDT | Severe Thunderstorm Warning | TFX | Fergus | 35 min |
| Jul 20, 2:33 PM MDT | Severe Thunderstorm Warning | GGW | Petroleum | 62 min |
| Jul 20, 2:37 PM MDT | Severe Thunderstorm Warning | BYZ | Stillwater, Yellowstone | 63 min |
| Jul 20, 3:15 PM MDT | Severe Thunderstorm Warning | BYZ | Yellowstone | 60 min |
| Jul 20, 3:15 PM MDT | Severe Thunderstorm Warning | GGW | Phillips | 65 min |
| Jul 20, 3:20 PM MDT | Severe Thunderstorm Warning | BYZ | Musselshell | 60 min |
| Jul 20, 3:28 PM MDT | Severe Thunderstorm Warning | BYZ | Big Horn | 62 min |
| Jul 20, 4:14 PM MDT | Severe Thunderstorm Warning | GGW | Valley | 66 min |
| Jul 20, 5:27 PM MDT | Severe Thunderstorm Warning | GGW | Garfield, McCone | 63 min |
| Jul 20, 6:48 PM MDT | Severe Thunderstorm Warning | BYZ | Custer | 62 min |
| Jul 20, 7:42 PM MDT | Severe Thunderstorm Warning | BYZ | Powder River | 63 min |
| Jul 20, 9:03 PM MDT | Severe Thunderstorm Warning | BYZ | Carter | 62 min |
| Jul 21, 2:58 PM MDT | Severe Thunderstorm Warning | MSO | Ravalli | 62 min |
| Jul 21, 3:21 PM MDT | Severe Thunderstorm Warning | MSO | Powell | 54 min |
| Jul 21, 4:11 PM MDT | Severe Thunderstorm Warning | TFX | Lewis and Clark | 34 min |
| Jul 21, 4:25 PM MDT | Severe Thunderstorm Warning | BYZ | Custer, Powder River | 45 min |
| Jul 21, 4:45 PM MDT | Severe Thunderstorm Warning | TFX | Chouteau | 50 min |
| Jul 21, 5:06 PM MDT | Severe Thunderstorm Warning | TFX | Cascade | 34 min |
| Jul 21, 5:10 PM MDT | Severe Thunderstorm Warning | GGW | Phillips | 65 min |
| Jul 21, 5:15 PM MDT | Severe Thunderstorm Warning | TFX | Blaine | 35 min |
| Jul 21, 5:36 PM MDT | Severe Thunderstorm Warning | TFX | Chouteau, Liberty | 34 min |
| Jul 21, 5:43 PM MDT | Severe Thunderstorm Warning | TFX | Chouteau | 32 min |
| Jul 21, 6:10 PM MDT | Severe Thunderstorm Warning | GGW | Phillips | 65 min |
| Jul 21, 6:12 PM MDT | Severe Thunderstorm Warning | TFX | Blaine, Chouteau | 33 min |
| Jul 21, 6:29 PM MDT | Severe Thunderstorm Warning | GGW | Prairie | 66 min |
| Jul 21, 6:34 PM MDT | Severe Thunderstorm Warning | TFX | Hill | 31 min |
| Jul 21, 6:48 PM MDT | Severe Thunderstorm Warning | TFX | Blaine | 32 min |
| Jul 21, 6:56 PM MDT | Severe Thunderstorm Warning | GGW | Dawson | 64 min |
| Jul 21, 7:03 PM MDT | Severe Thunderstorm Warning | GGW | Valley | 62 min |
| Jul 21, 7:10 PM MDT | Severe Thunderstorm Warning | BYZ | Powder River | 45 min |
| Jul 21, 7:28 PM MDT | Severe Thunderstorm Warning | BYZ | Carter | 57 min |
| Jul 21, 8:41 PM MDT | Severe Thunderstorm Warning | GGW | Roosevelt, Valley | 64 min |
| Jul 21, 9:01 PM MDT | Severe Thunderstorm Warning | GGW | Phillips, Valley | 64 min |
| Jul 21, 9:35 PM MDT | Severe Thunderstorm Warning | MSO | Flathead | 40 min |
| Jul 21, 9:42 PM MDT | Severe Thunderstorm Warning | GGW | Valley | 33 min |
| Jul 21, 9:43 PM MDT | Severe Thunderstorm Warning | GGW | Roosevelt | 62 min |
| Jul 21, 10:23 PM MDT | Severe Thunderstorm Warning | GGW | Valley | 62 min |
| Jul 21, 10:40 PM MDT | Severe Thunderstorm Warning | GGW | Sheridan | 65 min |
| Jul 21, 11:27 PM MDT | Severe Thunderstorm Warning | GGW | Valley | 33 min |
| Jul 21, 11:47 PM MDT | Severe Thunderstorm Warning | GGW | Roosevelt | 63 min |
| Jul 22, 12:03 AM MDT | Severe Thunderstorm Warning | GGW | McCone | 62 min |
| Jul 22, 12:11 AM MDT | Severe Thunderstorm Warning | GGW | Richland, Roosevelt, Sheridan | 64 min |
| Jul 22, 10:29 PM MDT | Severe Thunderstorm Warning | BYZ | Big Horn | 61 min |
| Jul 24, 3:19 PM MDT | Severe Thunderstorm Warning | GGW | Petroleum | 61 min |
| Jul 24, 3:43 PM MDT | Severe Thunderstorm Warning | GGW | Phillips | 62 min |
| Jul 24, 5:19 PM MDT | Severe Thunderstorm Warning | GGW | Valley | 66 min |
| Jul 24, 6:25 PM MDT | Severe Thunderstorm Warning | GGW | Valley | 50 min |
| Aug 2, 7:05 PM MDT | Severe Thunderstorm Warning | TFX | Judith Basin | 40 min |
| Aug 2, 7:46 PM MDT | Severe Thunderstorm Warning | TFX | Judith Basin | 29 min |
| Aug 2, 7:57 PM MDT | Severe Thunderstorm Warning | BYZ | Wheatland | 63 min |
| Aug 2, 9:01 PM MDT | Severe Thunderstorm Warning | BYZ | Wheatland | 64 min |
| Aug 2, 9:57 PM MDT | Severe Thunderstorm Warning | BYZ | Golden Valley, Stillwater | 88 min |
| Aug 3, 3:55 PM MDT | Severe Thunderstorm Warning | TFX | Judith Basin, Meagher | 30 min |
| Aug 3, 6:30 PM MDT | Severe Thunderstorm Warning | MSO | Flathead | 45 min |
| Aug 6, 4:17 PM MDT | Severe Thunderstorm Warning | TFX | Broadwater | 28 min |
| Aug 7, 3:36 PM MDT | Severe Thunderstorm Warning | MSO | Missoula, Ravalli | 54 min |
| Aug 7, 4:30 PM MDT | Severe Thunderstorm Warning | MSO | Lake, Missoula, Sanders | 60 min |
| Aug 7, 5:20 PM MDT | Severe Thunderstorm Warning | BYZ | Sweet Grass | 35 min |
| Aug 7, 5:27 PM MDT | Severe Thunderstorm Warning | TFX | Pondera, Teton | 63 min |
| Aug 7, 5:35 PM MDT | Severe Thunderstorm Warning | TFX | Lewis and Clark | 60 min |
| Aug 7, 6:10 PM MDT | Severe Thunderstorm Warning | TFX | Teton | 60 min |
| Aug 7, 6:28 PM MDT | Severe Thunderstorm Warning | TFX | Pondera | 42 min |
| Aug 7, 6:52 PM MDT | Severe Thunderstorm Warning | MSO | Lincoln, Sanders | 38 min |
| Aug 7, 7:16 PM MDT | Severe Thunderstorm Warning | TFX | Teton | 44 min |
| Aug 7, 7:27 PM MDT | Severe Thunderstorm Warning | BYZ | Yellowstone | 33 min |
| Aug 7, 7:31 PM MDT | Severe Thunderstorm Warning | TFX | Pondera | 59 min |
| Aug 7, 7:40 PM MDT | Severe Thunderstorm Warning | BYZ | Golden Valley, Stillwater | 60 min |
| Aug 7, 8:13 PM MDT | Severe Thunderstorm Warning | TFX | Toole | 57 min |
| Aug 7, 9:00 PM MDT | Severe Thunderstorm Warning | TFX | Liberty, Toole | 60 min |
| Aug 7, 9:15 PM MDT | Severe Thunderstorm Warning | TFX | Chouteau, Hill | 45 min |
| Aug 7, 9:43 PM MDT | Severe Thunderstorm Warning | MSO | Missoula | 62 min |
| Aug 7, 10:00 PM MDT | Severe Thunderstorm Warning | TFX | Hill, Liberty, Toole | 35 min |
| Aug 7, 10:35 PM MDT | Severe Thunderstorm Warning | MSO | Flathead, Missoula, Powell | 40 min |
| Aug 8, 12:04 AM MDT | Severe Thunderstorm Warning | TFX | Pondera, Toole | 26 min |
| Aug 8, 12:30 AM MDT | Severe Thunderstorm Warning | TFX | Liberty, Toole | 30 min |
| Aug 8, 6:50 PM MDT | Severe Thunderstorm Warning | GGW | Richland | 60 min |
| Aug 8, 7:48 PM MDT | Severe Thunderstorm Warning | GGW | Richland | 62 min |
| Aug 8, 7:51 PM MDT | Severe Thunderstorm Warning | GGW | Sheridan | 64 min |
| Aug 11, 4:45 PM MDT | Severe Thunderstorm Warning | GGW | Wibaux | 60 min |
| Aug 11, 5:01 PM MDT | Severe Thunderstorm Warning | BYZ | Carter | 64 min |
| Aug 11, 6:11 PM MDT | Severe Thunderstorm Warning | BYZ | Carter | 64 min |
| Aug 11, 8:04 PM MDT | Severe Thunderstorm Warning | BYZ | Custer | 61 min |
| Aug 12, 5:46 PM MDT | Severe Thunderstorm Warning | TFX | Teton | 29 min |
| Aug 13, 12:28 PM MDT | Severe Thunderstorm Warning | TFX | Beaverhead | 47 min |
| Aug 13, 1:26 PM MDT | Severe Thunderstorm Warning | TFX | Gallatin, Madison | 49 min |
| Aug 13, 2:00 PM MDT | Severe Thunderstorm Warning | TFX | Beaverhead | 60 min |
| Aug 13, 2:55 PM MDT | Severe Thunderstorm Warning | TFX | Beaverhead, Madison | 50 min |
| Aug 13, 3:40 PM MDT | Severe Thunderstorm Warning | TFX | Gallatin, Madison | 50 min |
| Aug 13, 4:46 PM MDT | Severe Thunderstorm Warning | TFX | Beaverhead, Madison | 44 min |
| Aug 13, 4:47 PM MDT | Severe Thunderstorm Warning | BYZ | Yellowstone | 63 min |
| Aug 13, 5:17 PM MDT | Severe Thunderstorm Warning | BYZ | Yellowstone | 63 min |
| Aug 13, 6:01 PM MDT | Severe Thunderstorm Warning | BYZ | Big Horn, Carbon | 64 min |
| Aug 13, 6:21 PM MDT | Severe Thunderstorm Warning | BYZ | Sweet Grass | 59 min |
| Aug 13, 6:37 PM MDT | Severe Thunderstorm Warning | GGW | Valley | 53 min |
| Aug 13, 7:25 PM MDT | Severe Thunderstorm Warning | BYZ | Wheatland | 65 min |
| Aug 13, 8:09 PM MDT | Severe Thunderstorm Warning | BYZ | Big Horn | 31 min |
| Aug 14, 4:57 PM MDT | Severe Thunderstorm Warning | TFX | Fergus | 48 min |
| Aug 14, 5:21 PM MDT | Severe Thunderstorm Warning | TFX | Chouteau | 39 min |
| Aug 14, 5:38 PM MDT | Severe Thunderstorm Warning | TFX | Judith Basin | 52 min |
| Aug 14, 5:45 PM MDT | Severe Thunderstorm Warning | TFX | Fergus | 30 min |
| Aug 14, 5:51 PM MDT | Severe Thunderstorm Warning | GGW | Petroleum | 69 min |
| Aug 14, 6:17 PM MDT | Severe Thunderstorm Warning | TFX | Fergus | 43 min |
| Aug 14, 6:22 PM MDT | Severe Thunderstorm Warning | TFX | Fergus | 53 min |
| Aug 14, 6:55 PM MDT | Severe Thunderstorm Warning | TFX | Judith Basin | 50 min |
| Aug 14, 7:00 PM MDT | Severe Thunderstorm Warning | GGW | Petroleum | 60 min |
| Aug 14, 7:10 PM MDT | Severe Thunderstorm Warning | GGW | Garfield | 50 min |
| Aug 14, 7:17 PM MDT | Severe Thunderstorm Warning | TFX | Fergus | 28 min |
| Aug 14, 7:55 PM MDT | Severe Thunderstorm Warning | GGW | Garfield | 65 min |
| Aug 14, 8:00 PM MDT | Severe Thunderstorm Warning | GGW | Petroleum | 60 min |
| Aug 14, 8:57 PM MDT | Severe Thunderstorm Warning | GGW | Garfield, Petroleum | 63 min |
| Aug 14, 9:54 PM MDT | Severe Thunderstorm Warning | GGW | Garfield | 66 min |
| Aug 14, 10:18 PM MDT | Severe Thunderstorm Warning | BYZ | Musselshell | 62 min |
| Aug 14, 10:22 PM MDT | Severe Thunderstorm Warning | TFX | Fergus | 38 min |
| Aug 14, 10:42 PM MDT | Severe Thunderstorm Warning | GGW | Petroleum | 63 min |
| Aug 14, 10:57 PM MDT | Severe Thunderstorm Warning | GGW | Garfield | 63 min |
| Aug 14, 11:10 PM MDT | Severe Thunderstorm Warning | GGW | McCone | 65 min |
| Aug 14, 11:36 PM MDT | Severe Thunderstorm Warning | GGW | Garfield | 54 min |
| Aug 15, 12:04 AM MDT | Severe Thunderstorm Warning | GGW | Dawson | 56 min |
| Aug 15, 12:33 AM MDT | Severe Thunderstorm Warning | GGW | Garfield | 57 min |
| Aug 15, 1:49 AM MDT | Severe Thunderstorm Warning | BYZ | Golden Valley, Stillwater | 61 min |
| Aug 15, 2:38 AM MDT | Severe Thunderstorm Warning | BYZ | Musselshell | 62 min |
| Aug 15, 2:59 AM MDT | Severe Thunderstorm Warning | BYZ | Stillwater | 66 min |
| Aug 15, 3:18 AM MDT | Severe Thunderstorm Warning | BYZ | Golden Valley | 62 min |
| Aug 15, 3:46 AM MDT | Severe Thunderstorm Warning | BYZ | Musselshell | 59 min |
| Aug 15, 4:24 AM MDT | Severe Thunderstorm Warning | GGW | Garfield | 61 min |
| Aug 15, 4:50 AM MDT | Severe Thunderstorm Warning | BYZ | Musselshell | 45 min |
| Aug 15, 5:48 AM MDT | Severe Thunderstorm Warning | BYZ | Rosebud | 62 min |
| Aug 15, 6:03 AM MDT | Severe Thunderstorm Warning | BYZ | Big Horn | 47 min |
| Aug 15, 6:30 AM MDT | Severe Thunderstorm Warning | BYZ | Treasure | 30 min |
| Aug 15, 6:48 AM MDT | Severe Thunderstorm Warning | BYZ | Rosebud | 62 min |
| Aug 15, 10:44 AM MDT | Severe Thunderstorm Warning | BYZ | Carbon | 31 min |
| Aug 15, 10:53 AM MDT | Severe Thunderstorm Warning | BYZ | Rosebud | 47 min |
| Aug 15, 11:49 AM MDT | Severe Thunderstorm Warning | BYZ | Big Horn | 61 min |
| Aug 15, 12:36 PM MDT | Severe Thunderstorm Warning | BYZ | Custer | 64 min |
| Aug 15, 12:45 PM MDT | Severe Thunderstorm Warning | BYZ | Treasure | 45 min |
| Aug 15, 12:56 PM MDT | Severe Thunderstorm Warning | BYZ | Rosebud | 59 min |
| Aug 15, 12:57 PM MDT | Severe Thunderstorm Warning | GGW | Prairie | 63 min |
| Aug 15, 1:41 PM MDT | Severe Thunderstorm Warning | BYZ | Custer | 49 min |
| Aug 15, 1:55 PM MDT | Severe Thunderstorm Warning | GGW | Wibaux | 60 min |
| Aug 15, 1:56 PM MDT | Severe Thunderstorm Warning | BYZ | Powder River | 64 min |
| Aug 15, 2:26 PM MDT | Severe Thunderstorm Warning | BYZ | Carter | 64 min |
| Aug 20, 6:43 PM MDT | Severe Thunderstorm Warning | BYZ | Golden Valley, Stillwater | 62 min |
| Aug 21, 2:23 PM MDT | Severe Thunderstorm Warning | MSO | Deer Lodge, Powell | 67 min |
| Aug 21, 5:46 PM MDT | Severe Thunderstorm Warning | TFX | Chouteau, Teton | 34 min |
| Aug 24, 3:19 PM MDT | Severe Thunderstorm Warning | MSO | Ravalli | 56 min |
| Aug 24, 6:53 PM MDT | Severe Thunderstorm Warning | TFX | Lewis and Clark | 62 min |
| Aug 24, 7:11 PM MDT | Severe Thunderstorm Warning | TFX | Broadwater, Meagher | 64 min |
| Aug 24, 7:56 PM MDT | Severe Thunderstorm Warning | TFX | Cascade | 64 min |
| Aug 24, 8:12 PM MDT | Severe Thunderstorm Warning | TFX | Meagher | 48 min |
| Aug 27, 11:10 PM MDT | Severe Thunderstorm Warning | BYZ | Big Horn | 65 min |
| Sep 10, 7:01 PM MDT | Severe Thunderstorm Warning | TFX | Pondera, Toole | 29 min |
| Sep 10, 7:39 PM MDT | Severe Thunderstorm Warning | TFX | Liberty, Toole | 41 min |
| Sep 10, 8:21 PM MDT | Severe Thunderstorm Warning | TFX | Chouteau, Hill | 24 min |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Fergus County20
- Valley County19
- Rosebud County17
- Garfield County17
- Powder River County15
- Carter County15
- Chouteau County14
- Custer County13
- Roosevelt County13
- Richland County12
- Yellowstone County11
- Big Horn County11
- Judith Basin County11
- Dawson County11
- McCone County11
- Stillwater County10
- Petroleum County10
- Phillips County10
- Musselshell County9
- Golden Valley County8
- Missoula County8
- Carbon County7
- Treasure County7
- Daniels County7
- Sheridan County7
- Cascade County7
- Liberty County7
- Meagher County7
- Lewis and Clark County7
- Wibaux County7
- Toole County7
- Prairie County6
- Powell County6
- Flathead County6
- Hill County6
- Fallon County5
- Beaverhead County5
- Wheatland County5
- Gallatin County5
- Ravalli County5
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordThe radar archive19982000
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.