Alert archive / Montana / Severe Thunderstorm Warnings / 2021
Severe Thunderstorm Warnings in Montana, July 2021
101 severe thunderstorm warnings in July 2021. 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 July 2021. Tap one for its archive.
- Severe Thunderstorm Warnings
- 101
- Busiest day
- July 7, 202128 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 1, 5:56 PM MDT | Severe Thunderstorm Warning | MSO | Missoula | 34 min |
| Jul 4, 6:26 PM MDT | Severe Thunderstorm Warning | TFX | Gallatin, Madison | 19 min |
| Jul 4, 6:44 PM MDT | Severe Thunderstorm Warning | TFX | Gallatin | 16 min |
| Jul 4, 7:03 PM MDT | Severe Thunderstorm Warning | BYZ | Park | 27 min |
| Jul 5, 9:57 PM MDT | Severe Thunderstorm Warning | TFX | Glacier | 33 min |
| Jul 5, 10:25 PM MDT | Severe Thunderstorm Warning | TFX | Glacier, Toole | 50 min |
| Jul 6, 4:21 PM MDT | Severe Thunderstorm Warning | BYZ | Golden Valley, Musselshell | 24 min |
| Jul 6, 4:40 PM MDT | Severe Thunderstorm Warning | TFX | Glacier | 35 min |
| Jul 6, 4:43 PM MDT | Severe Thunderstorm Warning | BYZ | Golden Valley, Musselshell, Yellowstone | 32 min |
| Jul 6, 4:43 PM MDT | Severe Thunderstorm Warning | BYZ | Musselshell, Rosebud | 47 min |
| Jul 6, 5:12 PM MDT | Severe Thunderstorm Warning | BYZ | Yellowstone | 48 min |
| Jul 6, 5:14 PM MDT | Severe Thunderstorm Warning | TFX | Glacier, Toole | 31 min |
| Jul 6, 5:27 PM MDT | Severe Thunderstorm Warning | BYZ | Musselshell, Rosebud, Treasure, Yellowstone | 63 min |
| Jul 6, 5:46 PM MDT | Severe Thunderstorm Warning | TFX | Blaine | 29 min |
| Jul 6, 5:55 PM MDT | Severe Thunderstorm Warning | BYZ | Big Horn, Yellowstone | 50 min |
| Jul 6, 6:14 PM MDT | Severe Thunderstorm Warning | TFX | Blaine | 29 min |
| Jul 6, 6:24 PM MDT | Severe Thunderstorm Warning | GGW | Phillips | 66 min |
| Jul 6, 6:28 PM MDT | Severe Thunderstorm Warning | BYZ | Big Horn, Rosebud, Treasure, Yellowstone | 62 min |
| Jul 6, 6:42 PM MDT | Severe Thunderstorm Warning | BYZ | Big Horn | 63 min |
| Jul 6, 6:50 PM MDT | Severe Thunderstorm Warning | TFX | Blaine | 40 min |
| Jul 6, 7:06 PM MDT | Severe Thunderstorm Warning | GGW | Petroleum, Phillips | 54 min |
| Jul 6, 7:27 PM MDT | Severe Thunderstorm Warning | TFX | Blaine | 63 min |
| Jul 6, 7:28 PM MDT | Severe Thunderstorm Warning | BYZ | Big Horn, Rosebud, Treasure | 62 min |
| Jul 6, 8:21 PM MDT | Severe Thunderstorm Warning | BYZ | Big Horn, Powder River, Rosebud | 54 min |
| Jul 6, 8:23 PM MDT | Severe Thunderstorm Warning | GGW | Phillips | 52 min |
| Jul 6, 8:25 PM MDT | Severe Thunderstorm Warning | BYZ | Big Horn, Rosebud | 35 min |
| Jul 6, 8:45 PM MDT | Severe Thunderstorm Warning | GGW | Garfield | 45 min |
| Jul 6, 8:45 PM MDT | Severe Thunderstorm Warning | TFX | Blaine | 19 min |
| Jul 6, 9:00 PM MDT | Severe Thunderstorm Warning | BYZ | Big Horn, Powder River, Rosebud | 32 min |
| Jul 6, 9:09 PM MDT | Severe Thunderstorm Warning | GGW | Phillips | 66 min |
| Jul 6, 9:26 PM MDT | Severe Thunderstorm Warning | GGW | Garfield | 34 min |
| Jul 6, 9:43 PM MDT | Severe Thunderstorm Warning | BYZ | Rosebud | 62 min |
| Jul 6, 10:17 PM MDT | Severe Thunderstorm Warning | GGW | Garfield, Phillips, Valley | 58 min |
| Jul 7, 2:45 PM MDT | Severe Thunderstorm Warning | MSO | Deer Lodge, Granite, Powell, Silver Bow | 30 min |
| Jul 7, 2:46 PM MDT | Severe Thunderstorm Warning | TFX | Fergus | 29 min |
| Jul 7, 3:13 PM MDT | Severe Thunderstorm Warning | TFX | Fergus | 47 min |
| Jul 7, 3:26 PM MDT | Severe Thunderstorm Warning | TFX | Jefferson, Lewis and Clark | 34 min |
| Jul 7, 4:12 PM MDT | Severe Thunderstorm Warning | BYZ | Musselshell | 33 min |
| Jul 7, 4:30 PM MDT | Severe Thunderstorm Warning | TFX | Gallatin | 30 min |
| Jul 7, 4:36 PM MDT | Severe Thunderstorm Warning | TFX | Gallatin | 15 min |
| Jul 7, 4:43 PM MDT | Severe Thunderstorm Warning | BYZ | Park | 32 min |
| Jul 7, 5:38 PM MDT | Severe Thunderstorm Warning | TFX | Blaine | 37 min |
| Jul 7, 5:49 PM MDT | Severe Thunderstorm Warning | BYZ | Carbon, Golden Valley, Stillwater, Sweet Grass, Wheatland | 56 min |
| Jul 7, 6:10 PM MDT | Severe Thunderstorm Warning | TFX | Fergus, Judith Basin | 35 min |
| Jul 7, 6:35 PM MDT | Severe Thunderstorm Warning | BYZ | Big Horn, Carbon, Golden Valley, Musselshell, Stillwater, Yellowstone | 55 min |
| Jul 7, 6:44 PM MDT | Severe Thunderstorm Warning | GGW | Petroleum, Phillips | 39 min |
| Jul 7, 7:00 PM MDT | Severe Thunderstorm Warning | BYZ | Rosebud | 30 min |
| Jul 7, 7:24 PM MDT | Severe Thunderstorm Warning | BYZ | Big Horn, Musselshell, Rosebud, Treasure, Yellowstone | 66 min |
| Jul 7, 7:31 PM MDT | Severe Thunderstorm Warning | BYZ | Custer, Rosebud | 29 min |
| Jul 7, 7:48 PM MDT | Severe Thunderstorm Warning | MSO | Flathead | 27 min |
| Jul 7, 7:53 PM MDT | Severe Thunderstorm Warning | BYZ | Custer | 52 min |
| Jul 7, 8:14 PM MDT | Severe Thunderstorm Warning | BYZ | Custer | 46 min |
| Jul 7, 8:23 PM MDT | Severe Thunderstorm Warning | BYZ | Big Horn, Rosebud | 52 min |
| Jul 7, 8:59 PM MDT | Severe Thunderstorm Warning | BYZ | Custer | 31 min |
| Jul 7, 9:13 PM MDT | Severe Thunderstorm Warning | BYZ | Big Horn, Powder River, Rosebud | 62 min |
| Jul 7, 9:19 PM MDT | Severe Thunderstorm Warning | BYZ | Carter | 56 min |
| Jul 8, 12:45 PM MDT | Severe Thunderstorm Warning | GGW | Garfield, Phillips, Valley | 60 min |
| Jul 8, 1:15 PM MDT | Severe Thunderstorm Warning | GGW | Phillips, Valley | 60 min |
| Jul 8, 1:35 PM MDT | Severe Thunderstorm Warning | GGW | Daniels, Sheridan | 55 min |
| Jul 8, 2:11 PM MDT | Severe Thunderstorm Warning | GGW | Phillips, Valley | 64 min |
| Jul 8, 2:26 PM MDT | Severe Thunderstorm Warning | GGW | Daniels, Roosevelt, Sheridan | 64 min |
| Jul 8, 2:50 PM MDT | Severe Thunderstorm Warning | GGW | McCone, Valley | 55 min |
| Jul 8, 3:21 PM MDT | Severe Thunderstorm Warning | GGW | Roosevelt, Sheridan | 54 min |
| Jul 8, 3:36 PM MDT | Severe Thunderstorm Warning | GGW | Dawson, Garfield, McCone, Valley | 54 min |
| Jul 8, 4:02 PM MDT | Severe Thunderstorm Warning | GGW | McCone, Richland, Roosevelt, Valley | 58 min |
| Jul 8, 4:14 PM MDT | Severe Thunderstorm Warning | GGW | Richland, Roosevelt, Sheridan | 61 min |
| Jul 8, 4:57 PM MDT | Severe Thunderstorm Warning | GGW | Richland, Roosevelt | 63 min |
| Jul 9, 4:04 PM MDT | Severe Thunderstorm Warning | GGW | Daniels, Valley | 29 min |
| Jul 11, 2:28 PM MDT | Severe Thunderstorm Warning | TFX | Glacier | 50 min |
| Jul 11, 3:03 PM MDT | Severe Thunderstorm Warning | TFX | Glacier, Toole | 42 min |
| Jul 11, 3:40 PM MDT | Severe Thunderstorm Warning | TFX | Toole | 50 min |
| Jul 11, 4:18 PM MDT | Severe Thunderstorm Warning | TFX | Liberty, Toole | 27 min |
| Jul 11, 5:11 PM MDT | Severe Thunderstorm Warning | TFX | Chouteau, Hill | 49 min |
| Jul 11, 5:55 PM MDT | Severe Thunderstorm Warning | TFX | Blaine, Chouteau, Hill | 65 min |
| Jul 13, 6:37 PM MDT | Severe Thunderstorm Warning | BYZ | Carter, Powder River | 23 min |
| Jul 16, 4:49 PM MDT | Severe Thunderstorm Warning | BYZ | Yellowstone | 41 min |
| Jul 17, 5:33 PM MDT | Severe Thunderstorm Warning | GGW | Dawson, Prairie, Wibaux | 57 min |
| Jul 18, 9:45 PM MDT | Severe Thunderstorm Warning | GGW | Prairie, Wibaux | 26 min |
| Jul 20, 4:59 PM MDT | Severe Thunderstorm Warning | GGW | Wibaux | 16 min |
| Jul 20, 6:48 PM MDT | Severe Thunderstorm Warning | TFX | Pondera, Teton | 27 min |
| Jul 21, 2:56 PM MDT | Severe Thunderstorm Warning | TFX | Glacier | 34 min |
| Jul 21, 3:16 PM MDT | Severe Thunderstorm Warning | TFX | Glacier | 29 min |
| Jul 21, 3:50 PM MDT | Severe Thunderstorm Warning | TFX | Pondera | 40 min |
| Jul 21, 4:07 PM MDT | Severe Thunderstorm Warning | TFX | Pondera, Teton | 38 min |
| Jul 21, 4:45 PM MDT | Severe Thunderstorm Warning | TFX | Liberty, Pondera, Teton, Toole | 45 min |
| Jul 21, 5:12 PM MDT | Severe Thunderstorm Warning | MSO | Missoula | 19 min |
| Jul 21, 5:29 PM MDT | Severe Thunderstorm Warning | TFX | Liberty, Toole | 46 min |
| Jul 21, 5:36 PM MDT | Severe Thunderstorm Warning | MSO | Missoula, Powell | 24 min |
| Jul 21, 6:01 PM MDT | Severe Thunderstorm Warning | MSO | Missoula, Powell | 29 min |
| Jul 21, 6:54 PM MDT | Severe Thunderstorm Warning | MSO | Granite, Missoula, Powell | 36 min |
| Jul 21, 7:30 PM MDT | Severe Thunderstorm Warning | MSO | Granite, Missoula, Powell | 30 min |
| Jul 21, 7:56 PM MDT | Severe Thunderstorm Warning | TFX | Lewis and Clark | 34 min |
| Jul 21, 8:54 PM MDT | Severe Thunderstorm Warning | TFX | Lewis and Clark, Teton | 36 min |
| Jul 21, 9:18 PM MDT | Severe Thunderstorm Warning | MSO | Granite | 27 min |
| Jul 22, 2:13 PM MDT | Severe Thunderstorm Warning | TFX | Gallatin | 32 min |
| Jul 22, 3:28 PM MDT | Severe Thunderstorm Warning | BYZ | Carter | 47 min |
| Jul 22, 5:17 PM MDT | Severe Thunderstorm Warning | GGW | Garfield, Petroleum, Phillips, Valley | 28 min |
| Jul 22, 5:51 PM MDT | Severe Thunderstorm Warning | GGW | Garfield, Phillips, Valley | 54 min |
| Jul 22, 6:37 PM MDT | Severe Thunderstorm Warning | GGW | Daniels, Garfield, McCone, Roosevelt, Valley | 38 min |
| Jul 22, 7:11 PM MDT | Severe Thunderstorm Warning | GGW | Dawson, Garfield, McCone, Richland, Roosevelt, Sheridan and 1 more | 64 min |
| Jul 29, 5:19 PM MDT | Severe Thunderstorm Warning | TFX | Madison | 41 min |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Rosebud County13
- Valley County12
- Big Horn County11
- Phillips County11
- Garfield County9
- Glacier County8
- Yellowstone County8
- Toole County7
- Musselshell County7
- Blaine County7
- Roosevelt County7
- Missoula County6
- Gallatin County5
- Powell County5
- Sheridan County5
- McCone County5
- Golden Valley County4
- Treasure County4
- Powder River County4
- Granite County4
- Custer County4
- Daniels County4
- Richland County4
- Pondera County4
- Teton County4
- Petroleum County3
- Fergus County3
- Lewis and Clark County3
- Carter County3
- Dawson County3
- Liberty County3
- Wibaux County3
- Madison County2
- Park County2
- Carbon County2
- Stillwater County2
- Chouteau County2
- Hill County2
- Prairie County2
- Deer Lodge County1
Nearby
Alerts in force nowTornadoes on recordThe radar archive20202022
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.