Tornado Warnings in Montana
590 tornado 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 tornado warnings reaches back to 1986.
Tornado Warnings by county
Each county as a circle sized by its count since 1986. Tap one for its archive.
- Tornado Warnings
- 590
- Busiest year
- 201056 tornado warnings
- Average year
- 16over 38 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 County55
- Roosevelt County44
- Rosebud County44
- Fergus County42
- Yellowstone County39
- Daniels County34
- Phillips County34
- Carter County33
- Dawson County30
- McCone County30
- Chouteau County29
- Garfield County29
- Powder River County28
- Big Horn County28
- Richland County24
- Sheridan County22
- Custer County21
- Judith Basin County20
- Blaine County16
- Musselshell County16
- Golden Valley County15
- Cascade County15
- Fallon County15
- Wheatland County15
- Wibaux County14
- Treasure County13
- Stillwater County12
- Hill County11
- Petroleum County10
- Prairie County9
- Lewis and Clark County9
- Meagher County7
- Liberty County6
- Carbon County6
- Toole County6
- Pondera County5
- Sweet Grass County5
- Beaverhead County3
- Gallatin County3
- Teton County3
The latest tornado warnings
The most recent on file, newest first.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 31, 5:44 PM MDT | Tornado Warning | TFX | Broadwater, Meagher | 16 min |
| Jun 15, 9:35 PM MDT | Tornado Warning | BYZ | Custer, Rosebud | 25 min |
| Jun 15, 8:23 PM MDT | Tornado Warning | BYZ | Musselshell | 37 min |
| Jun 15, 4:29 PM MDT | Tornado Warning | TFX | Chouteau | 31 min |
| Jun 13, 7:14 PM MDT | Tornado Warning | BYZ | Big Horn | 31 min |
| Jun 13, 6:42 PM MDT | Tornado Warning | BYZ | Big Horn, Yellowstone | 33 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.