Alert archive / Montana / Severe Thunderstorm Warnings
Severe Thunderstorm Warnings in Montana, 2013
502 severe thunderstorm warnings in 2013. 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 2013. Tap one for its archive.
- Severe Thunderstorm Warnings
- 502
- Busiest month
- July170 severe thunderstorm warnings
- Busiest day
- July 8, 201342 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.
279 of 502 severe thunderstorm warnings covering Montana in 2013 had a qualifying storm report inside them; 495 of 729 hail, wind and damage reports fell inside a warning, on average 24 minutes after it went out.
Montana, 2013
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Severe thunderstorm warnings | 502 | 279 | 44% | 729 | 68% | 24 min |
Each office's whole area, 2013
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Great Falls, MT: severe thunderstorm warnings | 138 | 69 | 50% | 206 | 51% | 22 min |
| NWS Glasgow, MT: severe thunderstorm warnings | 147 | 84 | 43% | 196 | 76% | 27 min |
| NWS Missoula, MT: severe thunderstorm warnings | 35 | 16 | 54% | 51 | 59% | 17 min |
| NWS Billings, MT: severe thunderstorm warnings | 196 | 118 | 40% | 320 | 75% | 24 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 |
|---|---|---|---|---|
| Mar 3, 3:17 PM MST | Severe Thunderstorm Warning | BYZ | Big Horn | 28 min |
| Mar 3, 3:46 PM MST | Severe Thunderstorm Warning | BYZ | Big Horn | 59 min |
| Apr 29, 3:30 PM MDT | Severe Thunderstorm Warning | GGW | Phillips, Valley | 60 min |
| May 13, 4:46 PM MDT | Severe Thunderstorm Warning | MSO | Granite, Lake, Missoula, Ravalli | 44 min |
| May 13, 6:11 PM MDT | Severe Thunderstorm Warning | MSO | Granite, Missoula, Ravalli | 49 min |
| May 13, 7:40 PM MDT | Severe Thunderstorm Warning | GGW | McCone, Roosevelt, Valley | 65 min |
| May 18, 4:26 PM MDT | Severe Thunderstorm Warning | BYZ | Powder River, Rosebud | 64 min |
| May 18, 8:23 PM MDT | Severe Thunderstorm Warning | BYZ | Fallon | 22 min |
| May 22, 12:27 PM MDT | Severe Thunderstorm Warning | MSO | Missoula | 33 min |
| May 23, 5:30 PM MDT | Severe Thunderstorm Warning | BYZ | Big Horn, Carbon | 45 min |
| May 23, 6:21 PM MDT | Severe Thunderstorm Warning | BYZ | Big Horn, Yellowstone | 39 min |
| May 25, 7:43 AM MDT | Severe Thunderstorm Warning | GGW | Richland, Wibaux | 47 min |
| May 25, 11:41 AM MDT | Severe Thunderstorm Warning | BYZ | Carter, Fallon | 49 min |
| May 25, 3:03 PM MDT | Severe Thunderstorm Warning | BYZ | Carter | 27 min |
| May 25, 3:03 PM MDT | Severe Thunderstorm Warning | GGW | Dawson | 57 min |
| May 25, 3:22 PM MDT | Severe Thunderstorm Warning | BYZ | Carter | 38 min |
| May 25, 3:30 PM MDT | Severe Thunderstorm Warning | BYZ | Carter | 60 min |
| May 25, 5:08 PM MDT | Severe Thunderstorm Warning | BYZ | Carter, Powder River | 67 min |
| May 25, 5:33 PM MDT | Severe Thunderstorm Warning | GGW | Garfield, McCone, Roosevelt, Valley | 42 min |
| May 25, 5:38 PM MDT | Severe Thunderstorm Warning | BYZ | Custer, Rosebud | 52 min |
| May 25, 6:09 PM MDT | Severe Thunderstorm Warning | GGW | Daniels, Valley | 66 min |
| May 25, 6:13 PM MDT | Severe Thunderstorm Warning | BYZ | Carter, Powder River | 47 min |
| May 25, 6:14 PM MDT | Severe Thunderstorm Warning | GGW | Garfield, McCone, Roosevelt, Valley | 61 min |
| May 25, 6:26 PM MDT | Severe Thunderstorm Warning | BYZ | Custer, Rosebud | 64 min |
| May 25, 6:34 PM MDT | Severe Thunderstorm Warning | GGW | Garfield, McCone | 56 min |
| May 25, 7:12 PM MDT | Severe Thunderstorm Warning | GGW | Dawson, Garfield, McCone, Richland, Roosevelt, Valley | 63 min |
| May 25, 7:13 PM MDT | Severe Thunderstorm Warning | BYZ | Rosebud | 62 min |
| May 25, 7:26 PM MDT | Severe Thunderstorm Warning | GGW | Dawson, Garfield, McCone, Prairie | 64 min |
| May 25, 7:28 PM MDT | Severe Thunderstorm Warning | BYZ | Custer, Rosebud | 62 min |
| May 25, 7:47 PM MDT | Severe Thunderstorm Warning | BYZ | Rosebud | 43 min |
| May 25, 8:02 PM MDT | Severe Thunderstorm Warning | GGW | Dawson, Garfield, McCone, Prairie, Richland | 58 min |
| May 25, 8:28 PM MDT | Severe Thunderstorm Warning | BYZ | Custer, Powder River, Rosebud | 62 min |
| May 26, 2:34 PM MDT | Severe Thunderstorm Warning | TFX | Chouteau, Fergus, Judith Basin | 41 min |
| May 26, 3:42 PM MDT | Severe Thunderstorm Warning | TFX | Fergus | 48 min |
| May 26, 4:01 PM MDT | Severe Thunderstorm Warning | BYZ | Big Horn, Stillwater, Yellowstone | 59 min |
| May 26, 4:30 PM MDT | Severe Thunderstorm Warning | BYZ | Musselshell, Yellowstone | 45 min |
| May 26, 5:03 PM MDT | Severe Thunderstorm Warning | BYZ | Musselshell, Yellowstone | 57 min |
| May 26, 5:13 PM MDT | Severe Thunderstorm Warning | GGW | Garfield, Petroleum, Phillips | 62 min |
| May 26, 5:56 PM MDT | Severe Thunderstorm Warning | BYZ | Big Horn | 49 min |
| May 26, 6:18 PM MDT | Severe Thunderstorm Warning | GGW | Garfield, Phillips, Valley | 57 min |
| May 26, 7:57 PM MDT | Severe Thunderstorm Warning | BYZ | Big Horn, Yellowstone | 63 min |
| May 26, 8:30 PM MDT | Severe Thunderstorm Warning | BYZ | Treasure, Yellowstone | 60 min |
| May 26, 8:35 PM MDT | Severe Thunderstorm Warning | GGW | Garfield, McCone, Valley | 40 min |
| May 26, 8:44 PM MDT | Severe Thunderstorm Warning | BYZ | Rosebud, Treasure | 61 min |
| May 26, 9:44 PM MDT | Severe Thunderstorm Warning | BYZ | Rosebud | 61 min |
| May 26, 10:21 PM MDT | Severe Thunderstorm Warning | BYZ | Rosebud, Treasure | 39 min |
| May 27, 2:12 PM MDT | Severe Thunderstorm Warning | BYZ | Powder River, Rosebud | 48 min |
| May 27, 2:12 PM MDT | Severe Thunderstorm Warning | BYZ | Big Horn, Powder River | 63 min |
| May 27, 5:04 PM MDT | Severe Thunderstorm Warning | GGW | Prairie | 56 min |
| Jun 7, 6:37 PM MDT | Severe Thunderstorm Warning | GGW | Phillips | 38 min |
| Jun 7, 7:13 PM MDT | Severe Thunderstorm Warning | GGW | Phillips, Valley | 47 min |
| Jun 11, 3:31 PM MDT | Severe Thunderstorm Warning | BYZ | Big Horn | 59 min |
| Jun 11, 4:56 PM MDT | Severe Thunderstorm Warning | BYZ | Big Horn | 49 min |
| Jun 12, 2:31 PM MDT | Severe Thunderstorm Warning | MSO | Deer Lodge, Powell, Silver Bow | 29 min |
| Jun 12, 2:42 PM MDT | Severe Thunderstorm Warning | TFX | Jefferson, Lewis and Clark | 48 min |
| Jun 12, 3:05 PM MDT | Severe Thunderstorm Warning | BYZ | Big Horn | 40 min |
| Jun 12, 3:11 PM MDT | Severe Thunderstorm Warning | TFX | Broadwater, Cascade, Jefferson, Lewis and Clark, Meagher | 49 min |
| Jun 12, 3:13 PM MDT | Severe Thunderstorm Warning | TFX | Cascade, Lewis and Clark | 47 min |
| Jun 12, 5:03 PM MDT | Severe Thunderstorm Warning | TFX | Broadwater, Jefferson, Lewis and Clark, Meagher | 42 min |
| Jun 12, 5:51 PM MDT | Severe Thunderstorm Warning | TFX | Lewis and Clark, Pondera, Teton | 39 min |
| Jun 12, 11:44 PM MDT | Severe Thunderstorm Warning | MSO | Powell | 31 min |
| Jun 13, 12:00 AM MDT | Severe Thunderstorm Warning | TFX | Lewis and Clark | 45 min |
| Jun 13, 12:40 AM MDT | Severe Thunderstorm Warning | TFX | Cascade, Lewis and Clark | 35 min |
| Jun 13, 1:12 AM MDT | Severe Thunderstorm Warning | TFX | Cascade, Lewis and Clark | 48 min |
| Jun 13, 1:55 AM MDT | Severe Thunderstorm Warning | TFX | Cascade | 50 min |
| Jun 13, 11:33 AM MDT | Severe Thunderstorm Warning | BYZ | Yellowstone | 42 min |
| Jun 13, 11:44 AM MDT | Severe Thunderstorm Warning | BYZ | Big Horn, Yellowstone | 46 min |
| Jun 13, 11:59 AM MDT | Severe Thunderstorm Warning | BYZ | Yellowstone | 46 min |
| Jun 13, 12:11 PM MDT | Severe Thunderstorm Warning | BYZ | Big Horn, Yellowstone | 49 min |
| Jun 13, 12:29 PM MDT | Severe Thunderstorm Warning | BYZ | Big Horn, Musselshell, Treasure, Yellowstone | 31 min |
| Jun 13, 2:37 PM MDT | Severe Thunderstorm Warning | BYZ | Park, Sweet Grass | 38 min |
| Jun 13, 3:38 PM MDT | Severe Thunderstorm Warning | BYZ | Big Horn | 52 min |
| Jun 13, 4:00 PM MDT | Severe Thunderstorm Warning | BYZ | Big Horn, Powder River, Rosebud | 45 min |
| Jun 13, 4:31 PM MDT | Severe Thunderstorm Warning | BYZ | Park, Sweet Grass | 29 min |
| Jun 13, 5:02 PM MDT | Severe Thunderstorm Warning | BYZ | Golden Valley, Sweet Grass | 28 min |
| Jun 13, 5:31 PM MDT | Severe Thunderstorm Warning | BYZ | Park, Sweet Grass | 44 min |
| Jun 13, 5:42 PM MDT | Severe Thunderstorm Warning | BYZ | Park | 48 min |
| Jun 13, 5:51 PM MDT | Severe Thunderstorm Warning | BYZ | Stillwater | 54 min |
| Jun 13, 6:13 PM MDT | Severe Thunderstorm Warning | BYZ | Park, Sweet Grass | 32 min |
| Jun 13, 6:16 PM MDT | Severe Thunderstorm Warning | BYZ | Golden Valley, Musselshell, Stillwater, Yellowstone | 44 min |
| Jun 13, 6:39 PM MDT | Severe Thunderstorm Warning | BYZ | Golden Valley, Sweet Grass, Wheatland | 36 min |
| Jun 13, 6:55 PM MDT | Severe Thunderstorm Warning | BYZ | Musselshell, Yellowstone | 50 min |
| Jun 13, 7:13 PM MDT | Severe Thunderstorm Warning | BYZ | Golden Valley, Stillwater, Wheatland | 47 min |
| Jun 13, 7:24 PM MDT | Severe Thunderstorm Warning | BYZ | Stillwater, Sweet Grass | 51 min |
| Jun 13, 7:43 PM MDT | Severe Thunderstorm Warning | BYZ | Musselshell, Rosebud, Treasure, Yellowstone | 47 min |
| Jun 13, 7:50 PM MDT | Severe Thunderstorm Warning | BYZ | Golden Valley, Musselshell | 40 min |
| Jun 13, 7:52 PM MDT | Severe Thunderstorm Warning | BYZ | Big Horn | 53 min |
| Jun 13, 8:28 PM MDT | Severe Thunderstorm Warning | BYZ | Musselshell | 62 min |
| Jun 13, 8:29 PM MDT | Severe Thunderstorm Warning | BYZ | Rosebud | 46 min |
| Jun 13, 8:33 PM MDT | Severe Thunderstorm Warning | GGW | Garfield | 57 min |
| Jun 13, 8:46 PM MDT | Severe Thunderstorm Warning | BYZ | Carbon, Stillwater | 59 min |
| Jun 13, 9:11 PM MDT | Severe Thunderstorm Warning | BYZ | Rosebud | 34 min |
| Jun 13, 9:33 PM MDT | Severe Thunderstorm Warning | BYZ | Carbon, Stillwater, Yellowstone | 57 min |
| Jun 13, 10:30 PM MDT | Severe Thunderstorm Warning | BYZ | Musselshell, Yellowstone | 30 min |
| Jun 13, 10:34 PM MDT | Severe Thunderstorm Warning | BYZ | Big Horn | 56 min |
| Jun 13, 10:53 PM MDT | Severe Thunderstorm Warning | BYZ | Musselshell, Rosebud, Treasure, Yellowstone | 37 min |
| Jun 13, 11:18 PM MDT | Severe Thunderstorm Warning | BYZ | Big Horn, Carbon | 27 min |
| Jun 13, 11:19 PM MDT | Severe Thunderstorm Warning | BYZ | Big Horn, Rosebud, Treasure | 56 min |
| Jun 13, 11:56 PM MDT | Severe Thunderstorm Warning | BYZ | Custer, Rosebud | 64 min |
| Jun 18, 3:48 PM MDT | Severe Thunderstorm Warning | MSO | Missoula | 42 min |
| Jun 18, 3:53 PM MDT | Severe Thunderstorm Warning | TFX | Glacier, Pondera, Teton | 52 min |
| Jun 18, 4:03 PM MDT | Severe Thunderstorm Warning | MSO | Mineral, Missoula | 42 min |
| Jun 18, 4:09 PM MDT | Severe Thunderstorm Warning | TFX | Glacier | 51 min |
| Jun 18, 4:57 PM MDT | Severe Thunderstorm Warning | TFX | Glacier, Pondera | 48 min |
| Jun 18, 5:00 PM MDT | Severe Thunderstorm Warning | TFX | Glacier | 60 min |
| Jun 18, 6:39 PM MDT | Severe Thunderstorm Warning | TFX | Cascade, Chouteau, Teton | 51 min |
| Jun 19, 3:29 PM MDT | Severe Thunderstorm Warning | TFX | Broadwater, Meagher | 46 min |
| Jun 19, 3:52 PM MDT | Severe Thunderstorm Warning | BYZ | Sweet Grass | 23 min |
| Jun 19, 3:54 PM MDT | Severe Thunderstorm Warning | BYZ | Carbon, Stillwater | 36 min |
| Jun 19, 4:17 PM MDT | Severe Thunderstorm Warning | BYZ | Sweet Grass | 58 min |
| Jun 19, 4:29 PM MDT | Severe Thunderstorm Warning | BYZ | Stillwater | 31 min |
| Jun 19, 4:49 PM MDT | Severe Thunderstorm Warning | TFX | Cascade, Lewis and Clark, Teton | 41 min |
| Jun 19, 4:57 PM MDT | Severe Thunderstorm Warning | BYZ | Stillwater | 33 min |
| Jun 19, 4:58 PM MDT | Severe Thunderstorm Warning | TFX | Cascade, Chouteau, Judith Basin | 47 min |
| Jun 19, 5:02 PM MDT | Severe Thunderstorm Warning | BYZ | Golden Valley, Sweet Grass, Wheatland | 58 min |
| Jun 19, 5:31 PM MDT | Severe Thunderstorm Warning | TFX | Teton | 44 min |
| Jun 19, 6:56 PM MDT | Severe Thunderstorm Warning | BYZ | Stillwater | 34 min |
| Jun 19, 8:08 PM MDT | Severe Thunderstorm Warning | GGW | Petroleum | 67 min |
| Jun 19, 8:09 PM MDT | Severe Thunderstorm Warning | BYZ | Musselshell | 66 min |
| Jun 19, 8:09 PM MDT | Severe Thunderstorm Warning | TFX | Chouteau, Hill | 51 min |
| Jun 19, 8:12 PM MDT | Severe Thunderstorm Warning | TFX | Fergus | 48 min |
| Jun 19, 8:13 PM MDT | Severe Thunderstorm Warning | GGW | Petroleum | 32 min |
| Jun 19, 8:22 PM MDT | Severe Thunderstorm Warning | TFX | Hill, Liberty, Toole | 53 min |
| Jun 19, 8:31 PM MDT | Severe Thunderstorm Warning | TFX | Blaine, Fergus | 44 min |
| Jun 19, 8:32 PM MDT | Severe Thunderstorm Warning | TFX | Chouteau, Hill | 43 min |
| Jun 19, 8:43 PM MDT | Severe Thunderstorm Warning | GGW | Garfield, Petroleum | 62 min |
| Jun 19, 8:50 PM MDT | Severe Thunderstorm Warning | GGW | Petroleum, Phillips | 55 min |
| Jun 19, 8:54 PM MDT | Severe Thunderstorm Warning | TFX | Hill, Liberty | 51 min |
| Jun 19, 9:10 PM MDT | Severe Thunderstorm Warning | GGW | Petroleum | 50 min |
| Jun 19, 9:10 PM MDT | Severe Thunderstorm Warning | TFX | Blaine, Hill | 65 min |
| Jun 19, 9:40 PM MDT | Severe Thunderstorm Warning | GGW | Garfield, Petroleum, Phillips | 65 min |
| Jun 19, 10:10 PM MDT | Severe Thunderstorm Warning | GGW | Garfield, Phillips, Valley | 65 min |
| Jun 19, 10:44 PM MDT | Severe Thunderstorm Warning | GGW | Garfield, McCone, Valley | 61 min |
| Jun 19, 10:52 PM MDT | Severe Thunderstorm Warning | GGW | McCone, Phillips, Valley | 53 min |
| Jun 19, 11:42 PM MDT | Severe Thunderstorm Warning | GGW | Garfield, McCone, Prairie, Roosevelt, Valley | 63 min |
| Jun 19, 11:44 PM MDT | Severe Thunderstorm Warning | GGW | Daniels, Roosevelt, Valley | 61 min |
| Jun 20, 12:39 AM MDT | Severe Thunderstorm Warning | GGW | Dawson, McCone, Richland | 66 min |
| Jun 20, 1:32 AM MDT | Severe Thunderstorm Warning | GGW | Dawson, McCone, Richland, Roosevelt, Wibaux | 58 min |
| Jun 22, 12:45 PM MDT | Severe Thunderstorm Warning | BYZ | Stillwater, Sweet Grass | 30 min |
| Jun 24, 4:25 PM MDT | Severe Thunderstorm Warning | BYZ | Big Horn | 35 min |
| Jun 24, 5:46 PM MDT | Severe Thunderstorm Warning | TFX | Chouteau | 44 min |
| Jun 24, 8:55 PM MDT | Severe Thunderstorm Warning | GGW | Garfield, Petroleum, Phillips | 50 min |
| Jun 24, 9:40 PM MDT | Severe Thunderstorm Warning | GGW | Garfield, Petroleum, Phillips | 50 min |
| Jun 24, 9:54 PM MDT | Severe Thunderstorm Warning | GGW | Garfield, Phillips, Valley | 66 min |
| Jun 24, 9:55 PM MDT | Severe Thunderstorm Warning | GGW | Phillips | 65 min |
| Jun 24, 10:56 PM MDT | Severe Thunderstorm Warning | GGW | Garfield, McCone, Phillips, Valley | 64 min |
| Jun 24, 11:29 PM MDT | Severe Thunderstorm Warning | GGW | Petroleum | 46 min |
| Jun 25, 12:08 AM MDT | Severe Thunderstorm Warning | GGW | Petroleum | 52 min |
| Jun 29, 1:50 PM MDT | Severe Thunderstorm Warning | MSO | Deer Lodge | 40 min |
| Jun 29, 6:17 PM MDT | Severe Thunderstorm Warning | BYZ | Park, Sweet Grass | 58 min |
| Jun 29, 7:03 PM MDT | Severe Thunderstorm Warning | BYZ | Stillwater, Sweet Grass | 27 min |
| Jun 29, 7:29 PM MDT | Severe Thunderstorm Warning | BYZ | Carbon, Stillwater, Yellowstone | 61 min |
| Jun 29, 8:03 PM MDT | Severe Thunderstorm Warning | BYZ | Carbon, Stillwater, Yellowstone | 57 min |
| Jun 30, 9:55 PM MDT | Severe Thunderstorm Warning | TFX | Blaine | 50 min |
| Jul 2, 4:24 PM MDT | Severe Thunderstorm Warning | TFX | Lewis and Clark | 51 min |
| Jul 2, 5:11 PM MDT | Severe Thunderstorm Warning | TFX | Broadwater, Jefferson, Lewis and Clark | 49 min |
| Jul 4, 2:58 PM MDT | Severe Thunderstorm Warning | BYZ | Musselshell | 32 min |
| Jul 4, 3:29 PM MDT | Severe Thunderstorm Warning | BYZ | Musselshell | 31 min |
| Jul 4, 4:00 PM MDT | Severe Thunderstorm Warning | BYZ | Musselshell, Yellowstone | 45 min |
| Jul 4, 4:44 PM MDT | Severe Thunderstorm Warning | BYZ | Musselshell, Treasure, Yellowstone | 31 min |
| Jul 4, 5:00 PM MDT | Severe Thunderstorm Warning | TFX | Blaine | 60 min |
| Jul 4, 5:59 PM MDT | Severe Thunderstorm Warning | TFX | Blaine | 61 min |
| Jul 4, 6:03 PM MDT | Severe Thunderstorm Warning | BYZ | Big Horn, Carbon, Yellowstone | 57 min |
| Jul 4, 10:52 PM MDT | Severe Thunderstorm Warning | TFX | Blaine | 53 min |
| Jul 4, 11:44 PM MDT | Severe Thunderstorm Warning | GGW | Phillips | 31 min |
| Jul 5, 3:00 AM MDT | Severe Thunderstorm Warning | TFX | Blaine, Hill | 45 min |
| Jul 5, 4:25 AM MDT | Severe Thunderstorm Warning | GGW | Garfield | 65 min |
| Jul 5, 12:42 PM MDT | Severe Thunderstorm Warning | GGW | Garfield, McCone | 63 min |
| Jul 5, 6:22 PM MDT | Severe Thunderstorm Warning | BYZ | Wheatland | 38 min |
| Jul 5, 7:18 PM MDT | Severe Thunderstorm Warning | TFX | Glacier, Pondera | 42 min |
| Jul 5, 10:50 PM MDT | Severe Thunderstorm Warning | TFX | Glacier, Toole | 40 min |
| Jul 7, 3:09 PM MDT | Severe Thunderstorm Warning | BYZ | Carter | 66 min |
| Jul 7, 3:24 PM MDT | Severe Thunderstorm Warning | TFX | Madison | 51 min |
| Jul 7, 3:57 PM MDT | Severe Thunderstorm Warning | TFX | Glacier, Toole | 48 min |
| Jul 7, 4:14 PM MDT | Severe Thunderstorm Warning | BYZ | Big Horn | 61 min |
| Jul 7, 4:43 PM MDT | Severe Thunderstorm Warning | TFX | Glacier, Toole | 47 min |
| Jul 7, 5:04 PM MDT | Severe Thunderstorm Warning | TFX | Fergus, Judith Basin | 41 min |
| Jul 7, 5:16 PM MDT | Severe Thunderstorm Warning | BYZ | Big Horn | 59 min |
| Jul 7, 5:18 PM MDT | Severe Thunderstorm Warning | TFX | Toole | 42 min |
| Jul 7, 5:34 PM MDT | Severe Thunderstorm Warning | TFX | Broadwater, Jefferson | 41 min |
| Jul 7, 5:56 PM MDT | Severe Thunderstorm Warning | BYZ | Golden Valley, Wheatland | 64 min |
| Jul 7, 6:08 PM MDT | Severe Thunderstorm Warning | BYZ | Big Horn, Powder River, Rosebud | 37 min |
| Jul 7, 8:10 PM MDT | Severe Thunderstorm Warning | GGW | Phillips, Valley | 50 min |
| Jul 7, 9:13 PM MDT | Severe Thunderstorm Warning | GGW | Valley | 62 min |
| Jul 7, 10:12 PM MDT | Severe Thunderstorm Warning | GGW | Valley | 48 min |
| Jul 8, 12:19 AM MDT | Severe Thunderstorm Warning | GGW | McCone, Roosevelt | 26 min |
| Jul 8, 2:43 AM MDT | Severe Thunderstorm Warning | TFX | Cascade | 47 min |
| Jul 8, 11:37 AM MDT | Severe Thunderstorm Warning | MSO | Ravalli | 23 min |
| Jul 8, 1:17 PM MDT | Severe Thunderstorm Warning | GGW | Garfield, Phillips, Valley | 58 min |
| Jul 8, 1:28 PM MDT | Severe Thunderstorm Warning | TFX | Broadwater, Meagher | 47 min |
| Jul 8, 1:49 PM MDT | Severe Thunderstorm Warning | TFX | Gallatin, Madison | 41 min |
| Jul 8, 2:03 PM MDT | Severe Thunderstorm Warning | TFX | Fergus, Judith Basin | 42 min |
| Jul 8, 2:10 PM MDT | Severe Thunderstorm Warning | GGW | Garfield, Valley | 65 min |
| Jul 8, 2:14 PM MDT | Severe Thunderstorm Warning | TFX | Judith Basin, Meagher | 46 min |
| Jul 8, 2:23 PM MDT | Severe Thunderstorm Warning | BYZ | Wheatland | 52 min |
| Jul 8, 2:26 PM MDT | Severe Thunderstorm Warning | TFX | Fergus, Judith Basin | 34 min |
| Jul 8, 2:27 PM MDT | Severe Thunderstorm Warning | MSO | Mineral, Sanders | 48 min |
| Jul 8, 2:43 PM MDT | Severe Thunderstorm Warning | TFX | Broadwater, Gallatin, Meagher | 32 min |
| Jul 8, 3:03 PM MDT | Severe Thunderstorm Warning | TFX | Gallatin, Madison | 42 min |
| Jul 8, 3:07 PM MDT | Severe Thunderstorm Warning | BYZ | Golden Valley, Sweet Grass, Wheatland | 53 min |
| Jul 8, 3:11 PM MDT | Severe Thunderstorm Warning | GGW | Garfield, McCone | 64 min |
| Jul 8, 3:11 PM MDT | Severe Thunderstorm Warning | TFX | Fergus | 49 min |
| Jul 8, 3:24 PM MDT | Severe Thunderstorm Warning | BYZ | Golden Valley, Wheatland | 66 min |
| Jul 8, 3:33 PM MDT | Severe Thunderstorm Warning | MSO | Lake | 27 min |
| Jul 8, 3:35 PM MDT | Severe Thunderstorm Warning | TFX | Fergus | 25 min |
| Jul 8, 3:53 PM MDT | Severe Thunderstorm Warning | BYZ | Golden Valley, Stillwater | 37 min |
| Jul 8, 4:01 PM MDT | Severe Thunderstorm Warning | GGW | Garfield, Petroleum | 59 min |
| Jul 8, 4:07 PM MDT | Severe Thunderstorm Warning | BYZ | Musselshell, Rosebud | 53 min |
| Jul 8, 4:10 PM MDT | Severe Thunderstorm Warning | GGW | Dawson, McCone, Prairie | 65 min |
| Jul 8, 4:12 PM MDT | Severe Thunderstorm Warning | MSO | Missoula | 33 min |
| Jul 8, 4:28 PM MDT | Severe Thunderstorm Warning | BYZ | Golden Valley, Musselshell, Stillwater, Yellowstone | 62 min |
| Jul 8, 4:29 PM MDT | Severe Thunderstorm Warning | GGW | Dawson, McCone, Richland | 61 min |
| Jul 8, 4:33 PM MDT | Severe Thunderstorm Warning | TFX | Beaverhead, Gallatin, Madison | 42 min |
| Jul 8, 4:35 PM MDT | Severe Thunderstorm Warning | BYZ | Big Horn, Carbon, Stillwater, Yellowstone | 55 min |
| Jul 8, 4:56 PM MDT | Severe Thunderstorm Warning | TFX | Pondera, Teton, Toole | 49 min |
| Jul 8, 5:03 PM MDT | Severe Thunderstorm Warning | BYZ | Big Horn, Musselshell, Treasure, Yellowstone | 57 min |
| Jul 8, 5:05 PM MDT | Severe Thunderstorm Warning | BYZ | Musselshell, Rosebud, Treasure | 55 min |
| Jul 8, 5:09 PM MDT | Severe Thunderstorm Warning | GGW | Dawson, Prairie | 66 min |
| Jul 8, 5:23 PM MDT | Severe Thunderstorm Warning | GGW | Dawson, Richland, Wibaux | 52 min |
| Jul 8, 5:25 PM MDT | Severe Thunderstorm Warning | BYZ | Big Horn, Treasure | 65 min |
| Jul 8, 5:50 PM MDT | Severe Thunderstorm Warning | TFX | Cascade, Chouteau, Liberty, Pondera, Teton | 40 min |
| Jul 8, 5:51 PM MDT | Severe Thunderstorm Warning | BYZ | Custer, Fallon | 54 min |
| Jul 8, 5:57 PM MDT | Severe Thunderstorm Warning | BYZ | Big Horn, Rosebud, Treasure, Yellowstone | 63 min |
| Jul 8, 6:02 PM MDT | Severe Thunderstorm Warning | GGW | Dawson, Prairie, Wibaux | 58 min |
| Jul 8, 6:21 PM MDT | Severe Thunderstorm Warning | BYZ | Custer, Rosebud | 69 min |
| Jul 8, 6:25 PM MDT | Severe Thunderstorm Warning | TFX | Cascade, Chouteau, Pondera, Teton | 65 min |
| Jul 8, 6:38 PM MDT | Severe Thunderstorm Warning | TFX | Cascade, Chouteau, Judith Basin, Teton | 67 min |
| Jul 8, 6:39 PM MDT | Severe Thunderstorm Warning | BYZ | Carter, Custer, Fallon | 51 min |
| Jul 8, 7:21 PM MDT | Severe Thunderstorm Warning | TFX | Blaine, Chouteau, Fergus | 54 min |
| Jul 8, 7:22 PM MDT | Severe Thunderstorm Warning | GGW | Dawson, Prairie | 53 min |
| Jul 8, 7:25 PM MDT | Severe Thunderstorm Warning | TFX | Cascade, Chouteau, Fergus, Judith Basin | 65 min |
| Jul 8, 7:29 PM MDT | Severe Thunderstorm Warning | BYZ | Carter, Custer, Fallon, Powder River | 61 min |
| Jul 8, 8:07 PM MDT | Severe Thunderstorm Warning | GGW | Dawson, Prairie, Wibaux | 53 min |
| Jul 8, 8:10 PM MDT | Severe Thunderstorm Warning | TFX | Blaine, Chouteau, Fergus, Judith Basin | 65 min |
| Jul 8, 8:19 PM MDT | Severe Thunderstorm Warning | BYZ | Carter, Fallon | 56 min |
| Jul 11, 4:46 PM MDT | Severe Thunderstorm Warning | GGW | Richland, Wibaux | 14 min |
| Jul 13, 3:25 PM MDT | Severe Thunderstorm Warning | GGW | Richland, Roosevelt | 65 min |
| Jul 15, 3:14 PM MDT | Severe Thunderstorm Warning | GGW | Daniels, Roosevelt, Sheridan, Valley | 61 min |
| Jul 15, 3:50 PM MDT | Severe Thunderstorm Warning | GGW | Daniels, Sheridan | 55 min |
| Jul 15, 3:54 PM MDT | Severe Thunderstorm Warning | BYZ | Powder River | 66 min |
| Jul 15, 4:19 PM MDT | Severe Thunderstorm Warning | GGW | Daniels, Roosevelt, Sheridan | 56 min |
| Jul 15, 4:51 PM MDT | Severe Thunderstorm Warning | BYZ | Powder River | 54 min |
| Jul 15, 5:13 PM MDT | Severe Thunderstorm Warning | GGW | Roosevelt, Sheridan | 62 min |
| Jul 15, 6:56 PM MDT | Severe Thunderstorm Warning | GGW | Roosevelt, Sheridan | 19 min |
| Jul 15, 7:23 PM MDT | Severe Thunderstorm Warning | GGW | Roosevelt | 67 min |
| Jul 17, 2:56 PM MDT | Severe Thunderstorm Warning | MSO | Flathead | 49 min |
| Jul 17, 3:02 PM MDT | Severe Thunderstorm Warning | MSO | Missoula | 43 min |
| Jul 17, 3:08 PM MDT | Severe Thunderstorm Warning | MSO | Lincoln | 37 min |
| Jul 17, 3:26 PM MDT | Severe Thunderstorm Warning | MSO | Flathead, Lake | 49 min |
| Jul 17, 3:32 PM MDT | Severe Thunderstorm Warning | MSO | Granite, Powell | 43 min |
| Jul 17, 3:42 PM MDT | Severe Thunderstorm Warning | MSO | Missoula, Powell | 63 min |
| Jul 17, 3:43 PM MDT | Severe Thunderstorm Warning | MSO | Flathead | 47 min |
| Jul 17, 4:00 PM MDT | Severe Thunderstorm Warning | MSO | Flathead | 30 min |
| Jul 17, 4:12 PM MDT | Severe Thunderstorm Warning | MSO | Powell | 33 min |
| Jul 17, 4:23 PM MDT | Severe Thunderstorm Warning | TFX | Lewis and Clark | 37 min |
| Jul 17, 4:31 PM MDT | Severe Thunderstorm Warning | TFX | Beaverhead, Madison | 44 min |
| Jul 17, 5:00 PM MDT | Severe Thunderstorm Warning | TFX | Gallatin, Madison | 45 min |
| Jul 17, 6:35 PM MDT | Severe Thunderstorm Warning | TFX | Cascade, Chouteau | 40 min |
| Jul 20, 3:36 PM MDT | Severe Thunderstorm Warning | GGW | Daniels | 54 min |
| Jul 20, 4:02 PM MDT | Severe Thunderstorm Warning | GGW | Valley | 58 min |
| Jul 20, 4:57 PM MDT | Severe Thunderstorm Warning | GGW | McCone, Roosevelt, Valley | 63 min |
| Jul 20, 5:58 PM MDT | Severe Thunderstorm Warning | GGW | Dawson, McCone, Richland, Roosevelt | 62 min |
| Jul 20, 6:40 PM MDT | Severe Thunderstorm Warning | GGW | Dawson, McCone | 65 min |
| Jul 20, 7:39 PM MDT | Severe Thunderstorm Warning | GGW | Dawson, Prairie | 51 min |
| Jul 20, 8:57 PM MDT | Severe Thunderstorm Warning | GGW | Prairie | 48 min |
| Jul 20, 9:10 PM MDT | Severe Thunderstorm Warning | BYZ | Custer, Fallon | 50 min |
| Jul 22, 5:05 PM MDT | Severe Thunderstorm Warning | BYZ | Carter | 55 min |
| Jul 22, 5:32 PM MDT | Severe Thunderstorm Warning | GGW | Garfield, McCone, Prairie | 43 min |
| Jul 22, 6:08 PM MDT | Severe Thunderstorm Warning | GGW | Garfield, McCone, Prairie | 37 min |
| Jul 22, 6:27 PM MDT | Severe Thunderstorm Warning | GGW | Phillips, Valley | 63 min |
| Jul 22, 6:39 PM MDT | Severe Thunderstorm Warning | GGW | Garfield, McCone, Prairie | 66 min |
| Jul 22, 6:58 PM MDT | Severe Thunderstorm Warning | BYZ | Custer, Rosebud | 62 min |
| Jul 22, 7:31 PM MDT | Severe Thunderstorm Warning | GGW | Prairie | 29 min |
| Jul 22, 7:55 PM MDT | Severe Thunderstorm Warning | BYZ | Custer | 65 min |
| Jul 22, 8:00 PM MDT | Severe Thunderstorm Warning | GGW | Garfield, Phillips, Valley | 45 min |
| Jul 22, 8:05 PM MDT | Severe Thunderstorm Warning | BYZ | Custer | 55 min |
| Jul 22, 8:46 PM MDT | Severe Thunderstorm Warning | BYZ | Carter, Custer, Powder River | 59 min |
| Jul 22, 10:34 PM MDT | Severe Thunderstorm Warning | BYZ | Carter | 41 min |
| Jul 22, 10:37 PM MDT | Severe Thunderstorm Warning | GGW | Garfield | 53 min |
| Jul 24, 2:39 PM MDT | Severe Thunderstorm Warning | GGW | McCone, Roosevelt, Valley | 51 min |
| Jul 24, 2:58 PM MDT | Severe Thunderstorm Warning | GGW | Valley | 32 min |
| Jul 24, 3:28 PM MDT | Severe Thunderstorm Warning | GGW | McCone, Roosevelt, Valley | 62 min |
| Jul 24, 4:15 PM MDT | Severe Thunderstorm Warning | GGW | Valley | 60 min |
| Jul 24, 4:22 PM MDT | Severe Thunderstorm Warning | GGW | McCone, Roosevelt, Valley | 53 min |
| Jul 24, 4:44 PM MDT | Severe Thunderstorm Warning | GGW | Valley | 61 min |
| Jul 24, 4:51 PM MDT | Severe Thunderstorm Warning | GGW | Phillips, Valley | 54 min |
| Jul 24, 5:08 PM MDT | Severe Thunderstorm Warning | GGW | Dawson, McCone | 67 min |
| Jul 24, 5:25 PM MDT | Severe Thunderstorm Warning | TFX | Glacier | 50 min |
| Jul 24, 5:29 PM MDT | Severe Thunderstorm Warning | GGW | McCone, Roosevelt, Valley | 61 min |
| Jul 24, 5:39 PM MDT | Severe Thunderstorm Warning | GGW | Phillips, Valley | 66 min |
| Jul 24, 5:39 PM MDT | Severe Thunderstorm Warning | GGW | Phillips | 51 min |
| Jul 24, 6:05 PM MDT | Severe Thunderstorm Warning | TFX | Glacier, Pondera | 40 min |
| Jul 24, 6:09 PM MDT | Severe Thunderstorm Warning | TFX | Glacier | 51 min |
| Jul 24, 6:13 PM MDT | Severe Thunderstorm Warning | GGW | Dawson | 62 min |
| Jul 24, 6:23 PM MDT | Severe Thunderstorm Warning | GGW | Garfield, Petroleum, Phillips | 52 min |
| Jul 24, 6:26 PM MDT | Severe Thunderstorm Warning | GGW | Garfield, McCone, Valley | 64 min |
| Jul 24, 6:36 PM MDT | Severe Thunderstorm Warning | GGW | Phillips | 54 min |
| Jul 24, 6:36 PM MDT | Severe Thunderstorm Warning | GGW | Dawson, McCone | 54 min |
| Jul 24, 6:38 PM MDT | Severe Thunderstorm Warning | TFX | Glacier, Pondera | 52 min |
| Jul 24, 7:02 PM MDT | Severe Thunderstorm Warning | GGW | Garfield, Petroleum, Phillips | 58 min |
| Jul 24, 7:17 PM MDT | Severe Thunderstorm Warning | TFX | Pondera, Teton, Toole | 43 min |
| Jul 24, 7:31 PM MDT | Severe Thunderstorm Warning | GGW | Dawson, Garfield, McCone, Prairie | 59 min |
| Jul 24, 7:51 PM MDT | Severe Thunderstorm Warning | GGW | Garfield | 54 min |
| Jul 24, 7:55 PM MDT | Severe Thunderstorm Warning | TFX | Cascade, Chouteau, Pondera, Teton | 65 min |
| Jul 24, 8:27 PM MDT | Severe Thunderstorm Warning | GGW | Dawson, McCone, Prairie | 63 min |
| Jul 24, 8:47 PM MDT | Severe Thunderstorm Warning | TFX | Cascade, Chouteau | 43 min |
| Jul 24, 9:22 PM MDT | Severe Thunderstorm Warning | TFX | Cascade, Chouteau, Judith Basin | 53 min |
| Jul 24, 10:07 PM MDT | Severe Thunderstorm Warning | TFX | Cascade, Judith Basin | 38 min |
| Jul 24, 11:32 PM MDT | Severe Thunderstorm Warning | BYZ | Carter, Powder River | 58 min |
| Jul 25, 12:27 AM MDT | Severe Thunderstorm Warning | BYZ | Carter, Powder River | 48 min |
| Jul 25, 5:19 PM MDT | Severe Thunderstorm Warning | BYZ | Wheatland | 26 min |
| Jul 25, 5:58 PM MDT | Severe Thunderstorm Warning | BYZ | Golden Valley, Sweet Grass, Wheatland | 47 min |
| Jul 25, 6:31 PM MDT | Severe Thunderstorm Warning | BYZ | Golden Valley, Stillwater, Sweet Grass | 59 min |
| Jul 25, 7:11 PM MDT | Severe Thunderstorm Warning | BYZ | Stillwater | 64 min |
| Jul 26, 1:28 AM MDT | Severe Thunderstorm Warning | BYZ | Custer, Rosebud | 62 min |
| Jul 28, 3:19 PM MDT | Severe Thunderstorm Warning | BYZ | Big Horn, Yellowstone | 56 min |
| Jul 28, 3:44 PM MDT | Severe Thunderstorm Warning | TFX | Blaine | 61 min |
| Jul 28, 4:25 PM MDT | Severe Thunderstorm Warning | TFX | Blaine | 65 min |
| Jul 28, 4:56 PM MDT | Severe Thunderstorm Warning | GGW | Phillips | 64 min |
| Jul 28, 7:21 PM MDT | Severe Thunderstorm Warning | TFX | Fergus | 24 min |
| Jul 28, 7:45 PM MDT | Severe Thunderstorm Warning | TFX | Glacier | 45 min |
| Jul 29, 12:56 AM MDT | Severe Thunderstorm Warning | TFX | Blaine | 49 min |
| Jul 29, 1:43 AM MDT | Severe Thunderstorm Warning | TFX | Blaine | 32 min |
| Aug 1, 2:21 PM MDT | Severe Thunderstorm Warning | TFX | Beaverhead | 39 min |
| Aug 1, 2:44 PM MDT | Severe Thunderstorm Warning | TFX | Broadwater, Cascade, Jefferson, Lewis and Clark | 46 min |
| Aug 1, 2:56 PM MDT | Severe Thunderstorm Warning | TFX | Beaverhead, Madison | 49 min |
| Aug 1, 3:30 PM MDT | Severe Thunderstorm Warning | TFX | Broadwater, Cascade, Lewis and Clark, Meagher | 45 min |
| Aug 1, 3:40 PM MDT | Severe Thunderstorm Warning | TFX | Beaverhead, Gallatin, Madison | 50 min |
| Aug 1, 4:00 PM MDT | Severe Thunderstorm Warning | TFX | Broadwater, Jefferson, Lewis and Clark | 45 min |
| Aug 1, 4:15 PM MDT | Severe Thunderstorm Warning | TFX | Cascade, Judith Basin, Meagher | 45 min |
| Aug 1, 4:26 PM MDT | Severe Thunderstorm Warning | TFX | Broadwater, Gallatin, Jefferson, Madison | 49 min |
| Aug 1, 5:05 PM MDT | Severe Thunderstorm Warning | TFX | Gallatin | 40 min |
| Aug 1, 5:23 PM MDT | Severe Thunderstorm Warning | BYZ | Park, Sweet Grass | 52 min |
| Aug 1, 5:39 PM MDT | Severe Thunderstorm Warning | TFX | Gallatin, Meagher | 51 min |
| Aug 1, 6:12 PM MDT | Severe Thunderstorm Warning | BYZ | Park, Sweet Grass, Wheatland | 63 min |
| Aug 1, 7:01 PM MDT | Severe Thunderstorm Warning | BYZ | Golden Valley, Stillwater, Sweet Grass, Wheatland | 59 min |
| Aug 1, 7:38 PM MDT | Severe Thunderstorm Warning | BYZ | Big Horn, Carbon, Stillwater, Yellowstone | 52 min |
| Aug 1, 7:52 PM MDT | Severe Thunderstorm Warning | BYZ | Golden Valley, Musselshell, Stillwater, Wheatland, Yellowstone | 53 min |
| Aug 1, 8:26 PM MDT | Severe Thunderstorm Warning | BYZ | Big Horn, Carbon, Stillwater, Treasure, Yellowstone | 64 min |
| Aug 1, 8:41 PM MDT | Severe Thunderstorm Warning | BYZ | Golden Valley, Musselshell, Rosebud, Yellowstone | 64 min |
| Aug 1, 9:17 PM MDT | Severe Thunderstorm Warning | BYZ | Big Horn, Rosebud, Treasure, Yellowstone | 58 min |
| Aug 1, 10:10 PM MDT | Severe Thunderstorm Warning | BYZ | Big Horn, Custer, Powder River, Rosebud, Treasure | 65 min |
| Aug 2, 1:57 AM MDT | Severe Thunderstorm Warning | TFX | Broadwater, Lewis and Clark | 48 min |
| Aug 2, 2:57 PM MDT | Severe Thunderstorm Warning | TFX | Fergus, Judith Basin | 48 min |
| Aug 3, 1:19 PM MDT | Severe Thunderstorm Warning | TFX | Cascade, Judith Basin | 41 min |
| Aug 3, 1:36 PM MDT | Severe Thunderstorm Warning | TFX | Fergus, Judith Basin | 39 min |
| Aug 3, 2:19 PM MDT | Severe Thunderstorm Warning | TFX | Fergus, Judith Basin | 56 min |
| Aug 3, 3:03 PM MDT | Severe Thunderstorm Warning | TFX | Fergus | 72 min |
| Aug 3, 4:01 PM MDT | Severe Thunderstorm Warning | GGW | Garfield, Phillips, Valley | 59 min |
| Aug 3, 4:11 PM MDT | Severe Thunderstorm Warning | GGW | Petroleum | 64 min |
| Aug 3, 4:58 PM MDT | Severe Thunderstorm Warning | GGW | Garfield, Valley | 62 min |
| Aug 3, 5:00 PM MDT | Severe Thunderstorm Warning | BYZ | Big Horn | 60 min |
| Aug 3, 5:11 PM MDT | Severe Thunderstorm Warning | GGW | Garfield, Petroleum | 64 min |
| Aug 3, 5:15 PM MDT | Severe Thunderstorm Warning | BYZ | Custer, Powder River, Rosebud | 45 min |
| Aug 3, 5:34 PM MDT | Severe Thunderstorm Warning | GGW | Garfield, Phillips, Valley | 41 min |
| Aug 3, 5:36 PM MDT | Severe Thunderstorm Warning | BYZ | Big Horn | 54 min |
| Aug 3, 5:56 PM MDT | Severe Thunderstorm Warning | GGW | Garfield, McCone | 64 min |
| Aug 3, 5:58 PM MDT | Severe Thunderstorm Warning | BYZ | Powder River | 47 min |
| Aug 3, 6:00 PM MDT | Severe Thunderstorm Warning | BYZ | Big Horn, Rosebud | 60 min |
| Aug 3, 6:11 PM MDT | Severe Thunderstorm Warning | BYZ | Rosebud | 49 min |
| Aug 3, 6:15 PM MDT | Severe Thunderstorm Warning | BYZ | Custer, Rosebud | 45 min |
| Aug 3, 6:23 PM MDT | Severe Thunderstorm Warning | BYZ | Big Horn | 67 min |
| Aug 3, 6:44 PM MDT | Severe Thunderstorm Warning | BYZ | Powder River | 46 min |
| Aug 3, 6:59 PM MDT | Severe Thunderstorm Warning | BYZ | Custer, Rosebud | 46 min |
| Aug 3, 7:11 PM MDT | Severe Thunderstorm Warning | BYZ | Big Horn, Powder River | 64 min |
| Aug 3, 7:29 PM MDT | Severe Thunderstorm Warning | BYZ | Carter, Powder River | 61 min |
| Aug 3, 7:40 PM MDT | Severe Thunderstorm Warning | BYZ | Custer | 50 min |
| Aug 3, 8:20 PM MDT | Severe Thunderstorm Warning | BYZ | Carter, Powder River | 25 min |
| Aug 3, 8:29 PM MDT | Severe Thunderstorm Warning | BYZ | Custer, Fallon | 61 min |
| Aug 3, 9:26 PM MDT | Severe Thunderstorm Warning | BYZ | Carter, Custer, Fallon | 64 min |
| Aug 3, 9:55 PM MDT | Severe Thunderstorm Warning | BYZ | Powder River | 65 min |
| Aug 4, 4:55 PM MDT | Severe Thunderstorm Warning | GGW | Roosevelt, Sheridan | 65 min |
| Aug 5, 1:34 PM MDT | Severe Thunderstorm Warning | TFX | Glacier, Pondera, Toole | 41 min |
| Aug 5, 2:45 PM MDT | Severe Thunderstorm Warning | TFX | Chouteau, Liberty, Toole | 60 min |
| Aug 5, 3:01 PM MDT | Severe Thunderstorm Warning | GGW | Phillips | 59 min |
| Aug 5, 3:04 PM MDT | Severe Thunderstorm Warning | BYZ | Musselshell, Rosebud | 56 min |
| Aug 5, 3:18 PM MDT | Severe Thunderstorm Warning | TFX | Glacier, Toole | 42 min |
| Aug 5, 3:20 PM MDT | Severe Thunderstorm Warning | TFX | Chouteau | 55 min |
| Aug 5, 3:25 PM MDT | Severe Thunderstorm Warning | GGW | Valley | 65 min |
| Aug 5, 3:50 PM MDT | Severe Thunderstorm Warning | GGW | Daniels, Valley | 55 min |
| Aug 5, 3:55 PM MDT | Severe Thunderstorm Warning | TFX | Toole | 50 min |
| Aug 5, 3:58 PM MDT | Severe Thunderstorm Warning | GGW | Phillips, Valley | 62 min |
| Aug 5, 4:17 PM MDT | Severe Thunderstorm Warning | GGW | Daniels, Roosevelt, Valley | 58 min |
| Aug 5, 4:22 PM MDT | Severe Thunderstorm Warning | GGW | Valley | 53 min |
| Aug 5, 4:35 PM MDT | Severe Thunderstorm Warning | GGW | Dawson, McCone, Prairie | 55 min |
| Aug 5, 4:40 PM MDT | Severe Thunderstorm Warning | BYZ | Big Horn, Powder River | 65 min |
| Aug 5, 4:41 PM MDT | Severe Thunderstorm Warning | GGW | Dawson, McCone, Richland | 34 min |
| Aug 5, 4:49 PM MDT | Severe Thunderstorm Warning | GGW | Daniels | 56 min |
| Aug 5, 4:52 PM MDT | Severe Thunderstorm Warning | BYZ | Custer, Rosebud | 53 min |
| Aug 5, 4:55 PM MDT | Severe Thunderstorm Warning | GGW | Phillips | 65 min |
| Aug 5, 4:57 PM MDT | Severe Thunderstorm Warning | BYZ | Custer | 48 min |
| Aug 5, 5:09 PM MDT | Severe Thunderstorm Warning | GGW | McCone, Roosevelt, Valley | 66 min |
| Aug 5, 5:18 PM MDT | Severe Thunderstorm Warning | TFX | Blaine, Chouteau, Hill | 57 min |
| Aug 5, 5:21 PM MDT | Severe Thunderstorm Warning | GGW | Dawson, Prairie, Wibaux | 54 min |
| Aug 5, 5:28 PM MDT | Severe Thunderstorm Warning | BYZ | Carter, Custer, Fallon, Powder River | 62 min |
| Aug 5, 5:38 PM MDT | Severe Thunderstorm Warning | GGW | McCone, Richland, Roosevelt, Valley | 67 min |
| Aug 5, 6:10 PM MDT | Severe Thunderstorm Warning | GGW | Richland, Roosevelt | 65 min |
| Aug 5, 6:27 PM MDT | Severe Thunderstorm Warning | BYZ | Carter, Custer, Fallon, Powder River | 63 min |
| Aug 6, 6:01 PM MDT | Severe Thunderstorm Warning | GGW | Richland | 29 min |
| Aug 7, 5:44 PM MDT | Severe Thunderstorm Warning | TFX | Cascade, Meagher | 46 min |
| Aug 7, 6:09 PM MDT | Severe Thunderstorm Warning | BYZ | Rosebud | 51 min |
| Aug 7, 6:24 PM MDT | Severe Thunderstorm Warning | TFX | Cascade, Meagher | 51 min |
| Aug 7, 7:08 PM MDT | Severe Thunderstorm Warning | BYZ | Powder River | 67 min |
| Aug 8, 9:17 PM MDT | Severe Thunderstorm Warning | BYZ | Stillwater | 28 min |
| Aug 8, 10:37 PM MDT | Severe Thunderstorm Warning | BYZ | Rosebud | 38 min |
| Aug 9, 7:01 PM MDT | Severe Thunderstorm Warning | MSO | Missoula, Ravalli | 44 min |
| Aug 9, 7:26 PM MDT | Severe Thunderstorm Warning | MSO | Granite, Missoula, Ravalli | 34 min |
| Aug 9, 7:55 PM MDT | Severe Thunderstorm Warning | MSO | Granite, Powell | 50 min |
| Aug 9, 9:11 PM MDT | Severe Thunderstorm Warning | MSO | Flathead, Lake | 49 min |
| Aug 9, 9:36 PM MDT | Severe Thunderstorm Warning | MSO | Flathead, Lake, Sanders | 39 min |
| Aug 10, 2:32 PM MDT | Severe Thunderstorm Warning | GGW | Valley | 58 min |
| Aug 10, 2:33 PM MDT | Severe Thunderstorm Warning | GGW | Richland, Roosevelt | 57 min |
| Aug 10, 3:29 PM MDT | Severe Thunderstorm Warning | GGW | Richland | 46 min |
| Aug 10, 3:52 PM MDT | Severe Thunderstorm Warning | GGW | McCone, Valley | 53 min |
| Aug 10, 4:24 PM MDT | Severe Thunderstorm Warning | BYZ | Carbon, Stillwater | 51 min |
| Aug 10, 7:06 PM MDT | Severe Thunderstorm Warning | BYZ | Golden Valley, Musselshell | 54 min |
| Aug 10, 7:41 PM MDT | Severe Thunderstorm Warning | BYZ | Fallon | 64 min |
| Aug 10, 8:15 PM MDT | Severe Thunderstorm Warning | TFX | Glacier, Pondera, Teton | 45 min |
| Aug 10, 8:56 PM MDT | Severe Thunderstorm Warning | TFX | Pondera, Teton | 49 min |
| Aug 11, 11:58 PM MDT | Severe Thunderstorm Warning | MSO | Sanders | 47 min |
| Aug 12, 6:51 PM MDT | Severe Thunderstorm Warning | MSO | Missoula, Powell | 39 min |
| Aug 12, 6:56 PM MDT | Severe Thunderstorm Warning | TFX | Hill | 49 min |
| Aug 12, 8:10 PM MDT | Severe Thunderstorm Warning | TFX | Hill | 50 min |
| Aug 12, 8:26 PM MDT | Severe Thunderstorm Warning | TFX | Hill | 49 min |
| Aug 12, 8:57 PM MDT | Severe Thunderstorm Warning | TFX | Chouteau, Hill, Liberty | 48 min |
| Aug 13, 4:28 PM MDT | Severe Thunderstorm Warning | GGW | Richland | 32 min |
| Aug 13, 4:38 PM MDT | Severe Thunderstorm Warning | GGW | Richland | 52 min |
| Aug 13, 5:19 PM MDT | Severe Thunderstorm Warning | GGW | Richland | 56 min |
| Aug 14, 7:29 PM MDT | Severe Thunderstorm Warning | BYZ | Carter, Powder River | 61 min |
| Aug 23, 2:08 PM MDT | Severe Thunderstorm Warning | TFX | Madison | 52 min |
| Aug 23, 4:22 PM MDT | Severe Thunderstorm Warning | BYZ | Park, Sweet Grass | 53 min |
| Aug 26, 4:22 PM MDT | Severe Thunderstorm Warning | GGW | Daniels, Sheridan | 53 min |
| Aug 26, 5:12 PM MDT | Severe Thunderstorm Warning | GGW | Sheridan | 48 min |
| Aug 28, 4:14 PM MDT | Severe Thunderstorm Warning | GGW | Garfield | 61 min |
| Aug 28, 6:03 PM MDT | Severe Thunderstorm Warning | GGW | Garfield, McCone | 57 min |
| Aug 28, 6:23 PM MDT | Severe Thunderstorm Warning | BYZ | Rosebud | 37 min |
| Aug 28, 6:26 PM MDT | Severe Thunderstorm Warning | GGW | Garfield, McCone, Prairie | 64 min |
| Aug 28, 7:03 PM MDT | Severe Thunderstorm Warning | BYZ | Custer | 42 min |
| Aug 28, 7:29 PM MDT | Severe Thunderstorm Warning | GGW | Garfield, McCone | 61 min |
| Aug 28, 7:46 PM MDT | Severe Thunderstorm Warning | BYZ | Custer | 59 min |
| Aug 28, 7:52 PM MDT | Severe Thunderstorm Warning | GGW | Dawson, Prairie | 53 min |
| Aug 28, 8:27 PM MDT | Severe Thunderstorm Warning | GGW | McCone | 63 min |
| Aug 28, 8:41 PM MDT | Severe Thunderstorm Warning | GGW | Garfield, Prairie | 64 min |
| Aug 28, 8:44 PM MDT | Severe Thunderstorm Warning | GGW | Prairie, Wibaux | 61 min |
| Aug 28, 9:09 PM MDT | Severe Thunderstorm Warning | GGW | Dawson, McCone, Richland | 66 min |
| Aug 28, 9:18 PM MDT | Severe Thunderstorm Warning | BYZ | Fallon | 57 min |
| Aug 28, 9:28 PM MDT | Severe Thunderstorm Warning | GGW | McCone, Roosevelt, Valley | 62 min |
| Aug 28, 10:04 PM MDT | Severe Thunderstorm Warning | GGW | Daniels, Richland, Roosevelt, Sheridan | 56 min |
| Aug 28, 10:32 PM MDT | Severe Thunderstorm Warning | GGW | Dawson, Prairie, Richland, Wibaux | 58 min |
| Aug 29, 4:23 PM MDT | Severe Thunderstorm Warning | MSO | Flathead, Lake, Sanders | 37 min |
| Aug 29, 9:32 PM MDT | Severe Thunderstorm Warning | TFX | Chouteau, Hill | 43 min |
| Aug 29, 9:50 PM MDT | Severe Thunderstorm Warning | TFX | Blaine, Chouteau, Hill | 55 min |
| Aug 29, 11:28 PM MDT | Severe Thunderstorm Warning | TFX | Blaine | 47 min |
| Aug 29, 11:33 PM MDT | Severe Thunderstorm Warning | GGW | Phillips | 57 min |
| Aug 30, 3:34 PM MDT | Severe Thunderstorm Warning | GGW | Garfield, Petroleum | 56 min |
| Aug 30, 4:36 PM MDT | Severe Thunderstorm Warning | GGW | Garfield | 39 min |
| Aug 30, 5:04 PM MDT | Severe Thunderstorm Warning | BYZ | Custer, Rosebud | 86 min |
| Aug 30, 6:17 PM MDT | Severe Thunderstorm Warning | BYZ | Custer | 58 min |
| Aug 30, 7:17 PM MDT | Severe Thunderstorm Warning | BYZ | Custer | 28 min |
| Sep 5, 4:17 PM MDT | Severe Thunderstorm Warning | TFX | Cascade, Chouteau | 43 min |
| Sep 5, 5:22 PM MDT | Severe Thunderstorm Warning | TFX | Chouteau, Hill, Liberty | 38 min |
| Sep 5, 6:08 PM MDT | Severe Thunderstorm Warning | TFX | Beaverhead, Madison | 52 min |
| Sep 5, 6:13 PM MDT | Severe Thunderstorm Warning | TFX | Beaverhead | 47 min |
| Sep 5, 7:15 PM MDT | Severe Thunderstorm Warning | TFX | Hill, Liberty | 30 min |
| Sep 5, 7:31 PM MDT | Severe Thunderstorm Warning | MSO | Deer Lodge, Granite, Powell, Silver Bow | 44 min |
| Sep 5, 7:37 PM MDT | Severe Thunderstorm Warning | TFX | Broadwater, Jefferson | 38 min |
| Sep 6, 2:48 PM MDT | Severe Thunderstorm Warning | MSO | Flathead | 57 min |
| Sep 6, 3:01 PM MDT | Severe Thunderstorm Warning | BYZ | Stillwater | 59 min |
| Sep 6, 3:26 PM MDT | Severe Thunderstorm Warning | TFX | Cascade, Lewis and Clark | 49 min |
| Sep 6, 3:55 PM MDT | Severe Thunderstorm Warning | TFX | Cascade, Lewis and Clark | 50 min |
| Sep 6, 4:09 PM MDT | Severe Thunderstorm Warning | TFX | Cascade | 66 min |
| Sep 6, 4:27 PM MDT | Severe Thunderstorm Warning | TFX | Fergus | 63 min |
| Sep 6, 4:34 PM MDT | Severe Thunderstorm Warning | TFX | Cascade | 41 min |
| Sep 6, 5:11 PM MDT | Severe Thunderstorm Warning | TFX | Cascade, Chouteau, Judith Basin | 49 min |
| Sep 6, 5:55 PM MDT | Severe Thunderstorm Warning | TFX | Chouteau, Judith Basin | 65 min |
| Sep 6, 6:11 PM MDT | Severe Thunderstorm Warning | TFX | Glacier, Toole | 34 min |
| Sep 6, 6:54 PM MDT | Severe Thunderstorm Warning | TFX | Teton | 51 min |
| Sep 6, 7:41 PM MDT | Severe Thunderstorm Warning | TFX | Chouteau, Pondera, Teton | 49 min |
| Sep 7, 3:00 PM MDT | Severe Thunderstorm Warning | BYZ | Custer, Fallon | 60 min |
| Sep 7, 3:58 PM MDT | Severe Thunderstorm Warning | BYZ | Fallon | 47 min |
| Sep 7, 4:21 PM MDT | Severe Thunderstorm Warning | BYZ | Carter, Fallon | 54 min |
| Sep 7, 5:12 PM MDT | Severe Thunderstorm Warning | BYZ | Carter, Fallon | 63 min |
| Sep 7, 5:22 PM MDT | Severe Thunderstorm Warning | BYZ | Golden Valley, Stillwater, Sweet Grass | 38 min |
| Sep 7, 5:59 PM MDT | Severe Thunderstorm Warning | BYZ | Golden Valley, Stillwater, Sweet Grass | 61 min |
| Sep 7, 6:16 PM MDT | Severe Thunderstorm Warning | BYZ | Carter, Fallon | 29 min |
| Sep 7, 6:20 PM MDT | Severe Thunderstorm Warning | TFX | Glacier | 40 min |
| Sep 7, 7:16 PM MDT | Severe Thunderstorm Warning | BYZ | Carter | 59 min |
| Sep 7, 8:46 PM MDT | Severe Thunderstorm Warning | BYZ | Yellowstone | 44 min |
| Sep 7, 9:27 PM MDT | Severe Thunderstorm Warning | BYZ | Big Horn, Yellowstone | 48 min |
| Sep 7, 10:13 PM MDT | Severe Thunderstorm Warning | BYZ | Big Horn, Yellowstone | 32 min |
| Sep 7, 11:08 PM MDT | Severe Thunderstorm Warning | BYZ | Big Horn, Rosebud | 52 min |
| Sep 8, 1:20 PM MDT | Severe Thunderstorm Warning | TFX | Cascade | 40 min |
| Sep 8, 1:55 PM MDT | Severe Thunderstorm Warning | TFX | Cascade, Chouteau, Judith Basin | 50 min |
| Sep 8, 2:33 PM MDT | Severe Thunderstorm Warning | TFX | Judith Basin | 42 min |
| Sep 8, 3:18 PM MDT | Severe Thunderstorm Warning | TFX | Chouteau, Fergus, Judith Basin | 42 min |
| Sep 8, 3:54 PM MDT | Severe Thunderstorm Warning | TFX | Chouteau, Fergus | 51 min |
| Sep 8, 4:20 PM MDT | Severe Thunderstorm Warning | TFX | Blaine | 70 min |
| Sep 8, 5:42 PM MDT | Severe Thunderstorm Warning | GGW | Petroleum | 63 min |
| Sep 17, 4:04 PM MDT | Severe Thunderstorm Warning | TFX | Gallatin | 41 min |
| Sep 17, 5:37 PM MDT | Severe Thunderstorm Warning | BYZ | Stillwater | 23 min |
| Sep 17, 5:58 PM MDT | Severe Thunderstorm Warning | BYZ | Carbon, Stillwater | 32 min |
| Sep 17, 9:21 PM MDT | Severe Thunderstorm Warning | GGW | Dawson, Richland, Wibaux | 54 min |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Valley County49
- Garfield County47
- McCone County46
- Big Horn County43
- Rosebud County40
- Yellowstone County35
- Phillips County32
- Custer County32
- Cascade County32
- Stillwater County31
- Chouteau County30
- Roosevelt County28
- Dawson County28
- Powder River County27
- Carter County25
- Prairie County24
- Richland County23
- Musselshell County23
- Sweet Grass County22
- Judith Basin County21
- Fergus County20
- Golden Valley County19
- Fallon County18
- Petroleum County18
- Lewis and Clark County18
- Glacier County18
- Blaine County17
- Treasure County15
- Pondera County15
- Teton County15
- Hill County15
- Carbon County13
- Broadwater County13
- Wheatland County13
- Toole County12
- Missoula County11
- Daniels County11
- Meagher County11
- Madison County11
- Wibaux County10
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordThe radar archive20122014
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.