Severe Thunderstorm Warnings in Montana
12,124 severe thunderstorm warnings since 1986. 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 since 1986. Tap one for its archive.
- Severe Thunderstorm Warnings
- 12,124
- Busiest year
- 2001595 severe thunderstorm warnings
- Average year
- 296over 41 years on file
Over time
By year
Before October 2007 these were issued for whole counties, and a storm crossing three counties was often three warnings; since then one polygon follows the storm. The count changed with the practice, not only with the weather.
By month of the year
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Valley County980
- Garfield County867
- McCone County821
- Rosebud County790
- Big Horn County761
- Roosevelt County737
- Dawson County705
- Powder River County666
- Phillips County661
- Carter County661
- Richland County640
- Fergus County639
- Chouteau County621
- Yellowstone County601
- Custer County598
- Cascade County537
- Prairie County481
- Blaine County415
- Sheridan County410
- Daniels County401
- Musselshell County399
- Judith Basin County397
- Hill County348
- Fallon County335
- Wibaux County334
- Lewis and Clark County331
- Stillwater County330
- Petroleum County328
- Teton County311
- Golden Valley County300
- Missoula County285
- Treasure County274
- Pondera County247
- Meagher County231
- Toole County222
- Wheatland County220
- Liberty County215
- Sweet Grass County214
- Carbon County194
- Powell County184
The latest severe thunderstorm warnings
The most recent on file, newest first.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 13, 9:28 PM MDT | Severe Thunderstorm Warning | TFX | Chouteau, Judith Basin | 47 min |
| Sep 13, 9:02 PM MDT | Severe Thunderstorm Warning | TFX | Chouteau, Fergus | 43 min |
| Sep 7, 3:44 PM MDT | Severe Thunderstorm Warning | GGW | Dawson, McCone, Richland | 50 min |
| Sep 7, 2:47 PM MDT | Severe Thunderstorm Warning | GGW | Garfield, McCone, Prairie | 58 min |
| Sep 7, 1:44 PM MDT | Severe Thunderstorm Warning | GGW | Garfield | 61 min |
| Sep 7, 12:55 PM MDT | Severe Thunderstorm Warning | BYZ | Rosebud, Treasure | 65 min |
| Sep 7, 12:36 PM MDT | Severe Thunderstorm Warning | BYZ | Musselshell | 39 min |
| Sep 7, 12:25 PM MDT | Severe Thunderstorm Warning | GGW | Garfield, Petroleum | 65 min |
| Sep 7, 3:05 AM MDT | Severe Thunderstorm Warning | BYZ | Musselshell | 55 min |
| Sep 7, 1:55 AM MDT | Severe Thunderstorm Warning | GGW | Valley | 65 min |
| Sep 7, 12:59 AM MDT | Severe Thunderstorm Warning | GGW | Phillips, Valley | 61 min |
| Sep 7, 12:44 AM MDT | Severe Thunderstorm Warning | GGW | Phillips | 61 min |
Nearby
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. Rebuilt daily.