Granite County weather alerts
There are no active weather alerts for Granite County, MT right now.
Since 2016 the National Weather Service has issued about 109 alerts that included Granite County, roughly 11 a year. The most common is the severe thunderstorm warning (46 from 2016 to 2025). No tornado warnings were recorded here in that period. 2 tornadoes have touched down in the county since 1950.
Updated from the National Weather Service · lists refresh hourly; the live map loads current alerts directly from the NWS
No warnings, watches or advisories include Granite County at the moment. This page updates automatically when the National Weather Service issues one. Check neighboring Ravalli County, Deer Lodge County, Missoula County, Powell County.
Granite County alert history
Alert events that included Granite County or its forecast zones, from the NWS warning archive.
| Alert type | 2016–2025 | 2026 | Last issued |
|---|---|---|---|
| Severe Thunderstorm Warning | 46 | 2 | September 6, 2026 |
| Flood Advisory | 24 | 1 | July 17, 2026 |
| Snow Squall Warning | 16 | 0 | December 27, 2025 |
| Severe Thunderstorm Watch | 12 | 1 | May 28, 2026 |
| Flood Watch | 7 | 0 | August 4, 2025 |
| Flood Warning | 4 | 0 | June 20, 2018 |
| Flash Flood Warning | 0 | 3 | July 17, 2026 |
Tornado history in Granite County
2 tornadoes have been recorded in Granite County since 1950. That ranks 41 of 56 counties in Montana. The most recent was on August 11, 1988 (rated F0).
Strongest tornadoes in Granite County
| Date | Rating | County | Path length | Width | Deaths | Injuries |
|---|---|---|---|---|---|---|
| August 11, 1988 | F0 | Granite County | 2 mi | 23 yd | 0 | 0 |
| May 4, 1971 | F0 | Granite County | 0.5 mi | 30 yd | 0 | 0 |
Most recent tornadoes
| Date | Rating | County | Path length | Width | Deaths | Injuries |
|---|---|---|---|---|---|---|
| August 11, 1988 | F0 | Granite County | 2 mi | 23 yd | 0 | 0 |
| May 4, 1971 | F0 | Granite County | 0.5 mi | 30 yd | 0 | 0 |
About Granite County
- Population: 3,602 (2024 estimate)
- State: Montana
- NOAA Weather Radio SAME code: 030039 (how to use it)