Alert archive / Montana / Severe Thunderstorm Warnings / 2025
Severe Thunderstorm Warnings in Montana, August 2025
81 severe thunderstorm warnings in August 2025. An alert counts here when it covered any part of the state, so the counties below add up to more than the state. The archive of severe thunderstorm warnings reaches back to 1986.
Severe Thunderstorm Warnings by county
Each county as a circle sized by its count in August 2025. Tap one for its archive.
- Severe Thunderstorm Warnings
- 81
- Busiest day
- August 5, 202514 severe thunderstorm warnings
Over time
By day
Days in UTC, the clock the archive keeps.
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 |
|---|---|---|---|---|
| Jul 31, 7:22 PM MDT | Severe Thunderstorm Warning | TFX | Broadwater, Jefferson, Lewis and Clark, Meagher | 53 min |
| Jul 31, 8:10 PM MDT | Severe Thunderstorm Warning | GGW | Garfield | 65 min |
| Jul 31, 8:38 PM MDT | Severe Thunderstorm Warning | BYZ | Powder River | 42 min |
| Jul 31, 9:03 PM MDT | Severe Thunderstorm Warning | TFX | Cascade | 42 min |
| Aug 1, 2:31 PM MDT | Severe Thunderstorm Warning | TFX | Judith Basin | 44 min |
| Aug 1, 3:42 PM MDT | Severe Thunderstorm Warning | TFX | Fergus, Judith Basin | 35 min |
| Aug 1, 5:10 PM MDT | Severe Thunderstorm Warning | TFX | Fergus, Judith Basin | 35 min |
| Aug 1, 8:04 PM MDT | Severe Thunderstorm Warning | TFX | Chouteau, Hill, Liberty | 26 min |
| Aug 1, 9:34 PM MDT | Severe Thunderstorm Warning | TFX | Blaine | 26 min |
| Aug 1, 9:39 PM MDT | Severe Thunderstorm Warning | GGW | Phillips | 66 min |
| Aug 1, 9:56 PM MDT | Severe Thunderstorm Warning | TFX | Blaine | 34 min |
| Aug 4, 3:40 PM MDT | Severe Thunderstorm Warning | MSO | Granite | 50 min |
| Aug 4, 3:54 PM MDT | Severe Thunderstorm Warning | MSO | Deer Lodge, Granite | 36 min |
| Aug 4, 4:41 PM MDT | Severe Thunderstorm Warning | GGW | Garfield | 64 min |
| Aug 4, 4:49 PM MDT | Severe Thunderstorm Warning | TFX | Broadwater, Jefferson, Lewis and Clark | 26 min |
| Aug 4, 5:40 PM MDT | Severe Thunderstorm Warning | GGW | Garfield | 36 min |
| Aug 4, 5:45 PM MDT | Severe Thunderstorm Warning | BYZ | Rosebud | 60 min |
| Aug 4, 6:19 PM MDT | Severe Thunderstorm Warning | TFX | Chouteau, Fergus, Judith Basin | 26 min |
| Aug 4, 6:41 PM MDT | Severe Thunderstorm Warning | TFX | Chouteau | 36 min |
| Aug 4, 6:44 PM MDT | Severe Thunderstorm Warning | BYZ | Rosebud | 61 min |
| Aug 4, 6:50 PM MDT | Severe Thunderstorm Warning | TFX | Blaine, Hill | 40 min |
| Aug 4, 6:56 PM MDT | Severe Thunderstorm Warning | TFX | Cascade | 34 min |
| Aug 4, 7:14 PM MDT | Severe Thunderstorm Warning | TFX | Hill | 46 min |
| Aug 4, 7:24 PM MDT | Severe Thunderstorm Warning | TFX | Blaine, Hill | 51 min |
| Aug 4, 7:45 PM MDT | Severe Thunderstorm Warning | BYZ | Rosebud | 32 min |
| Aug 5, 1:53 AM MDT | Severe Thunderstorm Warning | BYZ | Carter, Powder River | 67 min |
| Aug 5, 2:58 AM MDT | Severe Thunderstorm Warning | BYZ | Carter | 41 min |
| Aug 5, 3:22 AM MDT | Severe Thunderstorm Warning | BYZ | Carter | 38 min |
| Aug 5, 5:11 AM MDT | Severe Thunderstorm Warning | TFX | Fergus | 54 min |
| Aug 5, 5:26 AM MDT | Severe Thunderstorm Warning | GGW | Petroleum | 54 min |
| Aug 5, 5:55 PM MDT | Severe Thunderstorm Warning | GGW | Daniels, Roosevelt, Valley | 65 min |
| Aug 7, 3:06 AM MDT | Severe Thunderstorm Warning | TFX | Fergus | 69 min |
| Aug 7, 4:14 AM MDT | Severe Thunderstorm Warning | GGW | Garfield, Petroleum, Phillips | 43 min |
| Aug 7, 6:16 AM MDT | Severe Thunderstorm Warning | GGW | Dawson | 59 min |
| Aug 7, 6:42 AM MDT | Severe Thunderstorm Warning | GGW | Dawson, McCone, Prairie | 63 min |
| Aug 7, 7:40 AM MDT | Severe Thunderstorm Warning | GGW | Dawson, Prairie, Richland, Wibaux | 65 min |
| Aug 7, 3:27 PM MDT | Severe Thunderstorm Warning | TFX | Fergus | 18 min |
| Aug 7, 3:28 PM MDT | Severe Thunderstorm Warning | GGW | Garfield, Petroleum | 62 min |
| Aug 7, 4:29 PM MDT | Severe Thunderstorm Warning | GGW | Garfield, Petroleum | 61 min |
| Aug 7, 5:04 PM MDT | Severe Thunderstorm Warning | BYZ | Stillwater, Yellowstone | 46 min |
| Aug 7, 5:43 PM MDT | Severe Thunderstorm Warning | GGW | McCone, Valley | 62 min |
| Aug 7, 5:50 PM MDT | Severe Thunderstorm Warning | BYZ | Big Horn, Yellowstone | 26 min |
| Aug 7, 6:16 PM MDT | Severe Thunderstorm Warning | BYZ | Big Horn, Treasure, Yellowstone | 53 min |
| Aug 7, 6:24 PM MDT | Severe Thunderstorm Warning | GGW | Dawson, McCone, Richland | 66 min |
| Aug 7, 6:29 PM MDT | Severe Thunderstorm Warning | BYZ | Musselshell, Rosebud, Treasure, Yellowstone | 40 min |
| Aug 7, 6:42 PM MDT | Severe Thunderstorm Warning | GGW | McCone, Richland, Roosevelt, Valley | 63 min |
| Aug 7, 7:08 PM MDT | Severe Thunderstorm Warning | BYZ | Rosebud, Treasure | 47 min |
| Aug 7, 7:30 PM MDT | Severe Thunderstorm Warning | GGW | Dawson, McCone, Richland, Roosevelt, Wibaux | 60 min |
| Aug 7, 7:43 PM MDT | Severe Thunderstorm Warning | GGW | Daniels, Richland, Roosevelt, Sheridan | 47 min |
| Aug 7, 7:54 PM MDT | Severe Thunderstorm Warning | BYZ | Custer, Rosebud | 67 min |
| Aug 7, 8:26 PM MDT | Severe Thunderstorm Warning | GGW | Dawson, Garfield, McCone, Prairie, Wibaux | 64 min |
| Aug 7, 9:00 PM MDT | Severe Thunderstorm Warning | BYZ | Custer, Fallon | 75 min |
| Aug 7, 9:19 PM MDT | Severe Thunderstorm Warning | BYZ | Custer | 21 min |
| Aug 7, 9:28 PM MDT | Severe Thunderstorm Warning | BYZ | Carter, Fallon | 47 min |
| Aug 7, 10:10 PM MDT | Severe Thunderstorm Warning | BYZ | Carter, Fallon | 22 min |
| Aug 16, 6:46 PM MDT | Severe Thunderstorm Warning | TFX | Blaine, Hill | 44 min |
| Aug 17, 5:17 PM MDT | Severe Thunderstorm Warning | TFX | Fergus | 88 min |
| Aug 17, 6:06 PM MDT | Severe Thunderstorm Warning | GGW | Petroleum, Phillips | 54 min |
| Aug 17, 6:59 PM MDT | Severe Thunderstorm Warning | GGW | Garfield, Petroleum, Phillips | 61 min |
| Aug 17, 8:48 PM MDT | Severe Thunderstorm Warning | BYZ | Powder River | 42 min |
| Aug 17, 10:11 PM MDT | Severe Thunderstorm Warning | BYZ | Custer | 49 min |
| Aug 18, 8:07 PM MDT | Severe Thunderstorm Warning | TFX | Cascade, Chouteau, Teton | 38 min |
| Aug 19, 9:50 PM MDT | Severe Thunderstorm Warning | TFX | Cascade, Chouteau, Lewis and Clark, Teton | 55 min |
| Aug 19, 10:43 PM MDT | Severe Thunderstorm Warning | TFX | Cascade, Chouteau, Teton | 50 min |
| Aug 19, 11:02 PM MDT | Severe Thunderstorm Warning | TFX | Chouteau, Liberty, Pondera, Teton, Toole | 88 min |
| Aug 19, 11:28 PM MDT | Severe Thunderstorm Warning | TFX | Hill, Liberty, Toole | 92 min |
| Aug 20, 12:26 AM MDT | Severe Thunderstorm Warning | TFX | Chouteau, Hill, Liberty | 79 min |
| Aug 20, 2:44 PM MDT | Severe Thunderstorm Warning | TFX | Pondera, Toole | 46 min |
| Aug 20, 3:08 PM MDT | Severe Thunderstorm Warning | TFX | Pondera, Toole | 52 min |
| Aug 20, 3:23 PM MDT | Severe Thunderstorm Warning | TFX | Liberty, Toole | 52 min |
| Aug 20, 3:25 PM MDT | Severe Thunderstorm Warning | TFX | Pondera | 35 min |
| Aug 20, 3:55 PM MDT | Severe Thunderstorm Warning | TFX | Liberty, Pondera, Toole | 50 min |
| Aug 20, 4:13 PM MDT | Severe Thunderstorm Warning | TFX | Hill, Liberty | 62 min |
| Aug 20, 5:09 PM MDT | Severe Thunderstorm Warning | TFX | Chouteau, Hill | 47 min |
| Aug 20, 5:11 PM MDT | Severe Thunderstorm Warning | TFX | Chouteau, Fergus | 64 min |
| Aug 20, 5:44 PM MDT | Severe Thunderstorm Warning | TFX | Blaine, Hill | 76 min |
| Aug 20, 6:09 PM MDT | Severe Thunderstorm Warning | TFX | Fergus | 81 min |
| Aug 20, 7:13 PM MDT | Severe Thunderstorm Warning | GGW | Garfield, Petroleum, Phillips | 62 min |
| Aug 20, 8:09 PM MDT | Severe Thunderstorm Warning | GGW | Garfield, Petroleum, Phillips | 25 min |
| Aug 21, 3:50 AM MDT | Severe Thunderstorm Warning | GGW | Dawson, McCone, Prairie | 55 min |
| Aug 21, 4:39 AM MDT | Severe Thunderstorm Warning | GGW | Dawson, Richland, Wibaux | 51 min |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Garfield County10
- Chouteau County10
- Hill County10
- Fergus County9
- Petroleum County8
- Dawson County8
- Liberty County7
- McCone County7
- Blaine County6
- Phillips County6
- Rosebud County6
- Richland County6
- Toole County6
- Cascade County5
- Carter County5
- Pondera County5
- Judith Basin County4
- Roosevelt County4
- Prairie County4
- Wibaux County4
- Yellowstone County4
- Custer County4
- Teton County4
- Lewis and Clark County3
- Powder River County3
- Valley County3
- Treasure County3
- Fallon County3
- Broadwater County2
- Jefferson County2
- Granite County2
- Daniels County2
- Big Horn County2
- Meagher County1
- Deer Lodge County1
- Stillwater County1
- Musselshell County1
- Sheridan County1
Nearby
Alerts in force nowTornadoes on recordThe radar archive20242026
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.