Alert archive / Montana / Severe Thunderstorm Warnings
Severe Thunderstorm Warnings in Montana, 1991
109 severe thunderstorm warnings in 1991. 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 1991. Tap one for its archive.
- Severe Thunderstorm Warnings
- 109
- Busiest month
- June61 severe thunderstorm warnings
- Busiest day
- June 30, 199117 severe thunderstorm warnings
Over time
By month
The alerts
Every alert, in the order issued. Times are local, Mountain Time. Each opens its own page with the text, the map, the radar and the sounding.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 12, 1:32 AM MDT | Severe Thunderstorm Warning | GGW | Richland | 58 min |
| May 12, 4:11 AM MDT | Severe Thunderstorm Warning | GGW | Richland | 64 min |
| May 18, 6:52 PM MDT | Severe Thunderstorm Warning | BYZ | Yellowstone | 68 min |
| May 18, 7:15 PM MDT | Severe Thunderstorm Warning | BYZ | Carbon, Yellowstone | 60 min |
| May 19, 11:56 PM MDT | Severe Thunderstorm Warning | BYZ | Yellowstone | 64 min |
| May 20, 12:47 AM MDT | Severe Thunderstorm Warning | BYZ | Musselshell | 58 min |
| May 20, 1:07 AM MDT | Severe Thunderstorm Warning | BYZ | Sweet Grass | 68 min |
| May 20, 1:53 AM MDT | Severe Thunderstorm Warning | BYZ | Stillwater | 67 min |
| May 20, 1:24 PM MDT | Severe Thunderstorm Warning | BYZ | Stillwater | 66 min |
| May 20, 2:26 PM MDT | Severe Thunderstorm Warning | BYZ | Golden Valley, Wheatland | 64 min |
| May 20, 3:22 PM MDT | Severe Thunderstorm Warning | BYZ | Golden Valley, Musselshell | 68 min |
| May 20, 4:04 PM MDT | Severe Thunderstorm Warning | TFX | Fergus | 56 min |
| May 20, 4:35 PM MDT | Severe Thunderstorm Warning | BYZ | Musselshell | 55 min |
| May 20, 6:41 PM MDT | Severe Thunderstorm Warning | GGW | Garfield, Valley | 64 min |
| May 21, 10:50 PM MDT | Severe Thunderstorm Warning | BYZ | Custer | 55 min |
| May 21, 11:29 PM MDT | Severe Thunderstorm Warning | BYZ | Dawson, Prairie | 61 min |
| Jun 3, 4:16 PM MDT | Severe Thunderstorm Warning | BYZ | Yellowstone | 119 min |
| Jun 7, 6:06 PM MDT | Severe Thunderstorm Warning | BYZ | Yellowstone | 69 min |
| Jun 7, 7:21 PM MDT | Severe Thunderstorm Warning | BYZ | Yellowstone | 99 min |
| Jun 9, 1:14 AM MDT | Severe Thunderstorm Warning | BYZ | Carter, Fallon | 61 min |
| Jun 19, 6:38 PM MDT | Severe Thunderstorm Warning | BYZ | Musselshell, Rosebud | 67 min |
| Jun 19, 7:56 PM MDT | Severe Thunderstorm Warning | BYZ | Rosebud, Treasure | 64 min |
| Jun 19, 8:51 PM MDT | Severe Thunderstorm Warning | BYZ | Big Horn, Rosebud, Treasure | 69 min |
| Jun 20, 4:55 PM MDT | Severe Thunderstorm Warning | MSO | Lewis and Clark | 50 min |
| Jun 20, 6:40 PM MDT | Severe Thunderstorm Warning | TFX | Cascade, Chouteau, Teton | 50 min |
| Jun 21, 12:02 AM MDT | Severe Thunderstorm Warning | TFX | Liberty, Pondera, Toole | 58 min |
| Jun 21, 4:11 PM MDT | Severe Thunderstorm Warning | BYZ | Golden Valley, Musselshell | 64 min |
| Jun 21, 4:36 PM MDT | Severe Thunderstorm Warning | BYZ | Treasure, Yellowstone | 69 min |
| Jun 22, 6:43 PM MDT | Severe Thunderstorm Warning | BYZ | Carter, Fallon | 62 min |
| Jun 22, 6:48 PM MDT | Severe Thunderstorm Warning | BYZ | Golden Valley | 57 min |
| Jun 22, 7:35 PM MDT | Severe Thunderstorm Warning | BYZ | Musselshell | 55 min |
| Jun 22, 8:36 PM MDT | Severe Thunderstorm Warning | BYZ | Musselshell, Rosebud, Yellowstone | 69 min |
| Jun 22, 8:36 PM MDT | Severe Thunderstorm Warning | BYZ | Treasure | 69 min |
| Jun 23, 3:58 PM MDT | Severe Thunderstorm Warning | TFX | Fergus, Petroleum | 62 min |
| Jun 23, 4:13 PM MDT | Severe Thunderstorm Warning | BYZ | Stillwater | 62 min |
| Jun 23, 5:05 PM MDT | Severe Thunderstorm Warning | BYZ | Musselshell, Yellowstone | 55 min |
| Jun 23, 5:20 PM MDT | Severe Thunderstorm Warning | BYZ | Big Horn, Carbon, Yellowstone | 55 min |
| Jun 23, 7:03 PM MDT | Severe Thunderstorm Warning | BYZ | Rosebud, Treasure, Yellowstone | 57 min |
| Jun 23, 8:26 PM MDT | Severe Thunderstorm Warning | BYZ | Rosebud, Treasure | 64 min |
| Jun 23, 8:26 PM MDT | Severe Thunderstorm Warning | BYZ | Custer | 64 min |
| Jun 23, 9:20 PM MDT | Severe Thunderstorm Warning | BYZ | Carter, Custer, Fallon, Powder River | 55 min |
| Jun 23, 10:25 PM MDT | Severe Thunderstorm Warning | BYZ | Custer, Powder River, Rosebud | 65 min |
| Jun 23, 11:20 PM MDT | Severe Thunderstorm Warning | GGW | Richland | 40 min |
| Jun 24, 7:17 PM MDT | Severe Thunderstorm Warning | BYZ | Golden Valley, Stillwater, Sweet Grass | 118 min |
| Jun 24, 7:17 PM MDT | Severe Thunderstorm Warning | BYZ | Musselshell | 118 min |
| Jun 24, 8:32 PM MDT | Severe Thunderstorm Warning | BYZ | Yellowstone | 58 min |
| Jun 24, 9:49 PM MDT | Severe Thunderstorm Warning | BYZ | Musselshell, Yellowstone | 71 min |
| Jun 24, 10:07 PM MDT | Severe Thunderstorm Warning | BYZ | Dawson | 68 min |
| Jun 24, 10:08 PM MDT | Severe Thunderstorm Warning | GGW | Richland | 2 hr |
| Jun 24, 10:50 PM MDT | Severe Thunderstorm Warning | BYZ | Rosebud, Treasure, Yellowstone | 55 min |
| Jun 25, 12:29 AM MDT | Severe Thunderstorm Warning | BYZ | Custer | 91 min |
| Jun 25, 3:24 PM MDT | Severe Thunderstorm Warning | BYZ | Big Horn, Rosebud, Treasure | 111 min |
| Jun 25, 3:31 PM MDT | Severe Thunderstorm Warning | TFX | Cascade, Chouteau | 59 min |
| Jun 25, 3:40 PM MDT | Severe Thunderstorm Warning | GGW | Richland | 65 min |
| Jun 25, 4:48 PM MDT | Severe Thunderstorm Warning | BYZ | Yellowstone | 57 min |
| Jun 25, 5:26 PM MDT | Severe Thunderstorm Warning | BYZ | Custer, Fallon, Prairie | 64 min |
| Jun 29, 4:34 PM MDT | Severe Thunderstorm Warning | BYZ | Big Horn, Treasure | 56 min |
| Jun 29, 4:50 PM MDT | Severe Thunderstorm Warning | TFX | Chouteau | 55 min |
| Jun 29, 5:11 PM MDT | Severe Thunderstorm Warning | BYZ | Golden Valley, Sweet Grass, Wheatland | 64 min |
| Jun 29, 5:25 PM MDT | Severe Thunderstorm Warning | TFX | Hill, Liberty | 95 min |
| Jun 29, 6:05 PM MDT | Severe Thunderstorm Warning | BYZ | Golden Valley | 55 min |
| Jun 29, 6:07 PM MDT | Severe Thunderstorm Warning | TFX | Fergus | 68 min |
| Jun 29, 6:20 PM MDT | Severe Thunderstorm Warning | TFX | Blaine | 70 min |
| Jun 29, 6:31 PM MDT | Severe Thunderstorm Warning | TFX | Cascade | 59 min |
| Jun 29, 6:38 PM MDT | Severe Thunderstorm Warning | GGW | Garfield | 67 min |
| Jun 29, 6:45 PM MDT | Severe Thunderstorm Warning | BYZ | Custer, Rosebud | 60 min |
| Jun 29, 7:08 PM MDT | Severe Thunderstorm Warning | TFX | Fergus | 67 min |
| Jun 29, 7:10 PM MDT | Severe Thunderstorm Warning | BYZ | Musselshell | 35 min |
| Jun 29, 7:20 PM MDT | Severe Thunderstorm Warning | TFX | Blaine | 70 min |
| Jun 29, 7:25 PM MDT | Severe Thunderstorm Warning | TFX | Petroleum | 65 min |
| Jun 29, 7:33 PM MDT | Severe Thunderstorm Warning | BYZ | Custer, Prairie | 57 min |
| Jun 29, 8:00 PM MDT | Severe Thunderstorm Warning | GGW | Phillips | 60 min |
| Jun 29, 8:35 PM MDT | Severe Thunderstorm Warning | TFX | Petroleum | 55 min |
| Jun 29, 8:36 PM MDT | Severe Thunderstorm Warning | BYZ | Dawson, Prairie | 69 min |
| Jun 29, 9:18 PM MDT | Severe Thunderstorm Warning | BYZ | Fallon, Wibaux | 57 min |
| Jun 29, 9:18 PM MDT | Severe Thunderstorm Warning | BYZ | Dawson | 57 min |
| Jun 29, 11:25 PM MDT | Severe Thunderstorm Warning | BYZ | Rosebud | 65 min |
| Jul 4, 7:53 PM MDT | Severe Thunderstorm Warning | GGW | Valley | 2 hr |
| Jul 4, 10:59 PM MDT | Severe Thunderstorm Warning | GGW | McCone | 61 min |
| Jul 4, 11:11 PM MDT | Severe Thunderstorm Warning | BYZ | Dawson | 64 min |
| Jul 5, 1:31 AM MDT | Severe Thunderstorm Warning | GGW | Roosevelt | 29 min |
| Jul 5, 2:17 AM MDT | Severe Thunderstorm Warning | GGW | Richland | 58 min |
| Jul 9, 7:39 PM MDT | Severe Thunderstorm Warning | BYZ | Musselshell | 66 min |
| Jul 9, 8:16 PM MDT | Severe Thunderstorm Warning | BYZ | Musselshell, Yellowstone | 59 min |
| Jul 9, 9:28 PM MDT | Severe Thunderstorm Warning | BYZ | Yellowstone | 62 min |
| Jul 15, 11:59 PM MDT | Severe Thunderstorm Warning | BYZ | Musselshell, Rosebud | 61 min |
| Jul 15, 11:59 PM MDT | Severe Thunderstorm Warning | BYZ | Golden Valley | 61 min |
| Jul 16, 8:30 PM MDT | Severe Thunderstorm Warning | TFX | Blaine, Hill | 60 min |
| Jul 16, 10:51 PM MDT | Severe Thunderstorm Warning | BYZ | Dawson | 69 min |
| Jul 17, 7:51 PM MDT | Severe Thunderstorm Warning | TFX | Fergus | 54 min |
| Jul 17, 8:59 PM MDT | Severe Thunderstorm Warning | GGW | Garfield, Phillips, Valley | 61 min |
| Jul 17, 9:38 PM MDT | Severe Thunderstorm Warning | GGW | McCone, Roosevelt | 67 min |
| Jul 17, 10:54 PM MDT | Severe Thunderstorm Warning | GGW | Sheridan | 41 min |
| Aug 6, 5:15 PM MDT | Severe Thunderstorm Warning | BYZ | Fallon, Prairie | 60 min |
| Aug 6, 5:15 PM MDT | Severe Thunderstorm Warning | BYZ | Dawson | 60 min |
| Aug 6, 6:20 PM MDT | Severe Thunderstorm Warning | GGW | Richland | 55 min |
| Aug 6, 7:49 PM MDT | Severe Thunderstorm Warning | GGW | Richland | 41 min |
| Aug 6, 8:52 PM MDT | Severe Thunderstorm Warning | GGW | Garfield, Phillips, Valley | 2 hr |
| Aug 10, 5:51 PM MDT | Severe Thunderstorm Warning | MSO | Granite | 52 min |
| Aug 11, 6:50 PM MDT | Severe Thunderstorm Warning | TFX | Fergus | 55 min |
| Aug 12, 4:46 PM MDT | Severe Thunderstorm Warning | BYZ | Golden Valley, Sweet Grass, Wheatland | 59 min |
| Aug 13, 5:16 PM MDT | Severe Thunderstorm Warning | TFX | Liberty, Pondera, Toole | 51 min |
| Aug 13, 6:01 PM MDT | Severe Thunderstorm Warning | TFX | Chouteau | 44 min |
| Aug 13, 6:50 PM MDT | Severe Thunderstorm Warning | TFX | Chouteau | 2 hr |
| Aug 14, 3:08 PM MDT | Severe Thunderstorm Warning | TFX | Fergus | 52 min |
| Aug 14, 3:08 PM MDT | Severe Thunderstorm Warning | TFX | Judith Basin | 33 min |
| Aug 14, 4:01 PM MDT | Severe Thunderstorm Warning | TFX | Fergus | 44 min |
| Aug 27, 3:15 PM MDT | Severe Thunderstorm Warning | MSO | Missoula | 30 min |
| Sep 7, 6:20 PM MDT | Severe Thunderstorm Warning | GGW | Richland | 55 min |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Yellowstone County17
- Musselshell County14
- Rosebud County12
- Richland County9
- Golden Valley County9
- Treasure County9
- Fergus County8
- Custer County8
- Dawson County7
- Fallon County6
- Prairie County5
- Chouteau County5
- Sweet Grass County4
- Stillwater County4
- Garfield County4
- Valley County4
- Big Horn County4
- Wheatland County3
- Carter County3
- Cascade County3
- Liberty County3
- Petroleum County3
- Blaine County3
- Phillips County3
- Carbon County2
- Pondera County2
- Toole County2
- Powder River County2
- Hill County2
- McCone County2
- Roosevelt County2
- Lewis and Clark County1
- Teton County1
- Wibaux County1
- Sheridan County1
- Granite County1
- Judith Basin County1
- Missoula County1
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordThe radar archive19901992
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.