Jefferson County weather alerts
There are no active weather alerts for Jefferson County, MT right now.
Since 2016 the National Weather Service has issued about 409 alerts that included Jefferson County, roughly 41 a year. The most common is the winter weather advisory (156 from 2016 to 2025). No tornado warnings were recorded here in that period. 1 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 Jefferson County at the moment. This page updates automatically when the National Weather Service issues one. Check neighboring Lewis and Clark County, Broadwater County, Gallatin County, Deer Lodge County.
Jefferson County alert history
Alert events that included Jefferson County or its forecast zones, from the NWS warning archive.
| Alert type | 2016–2025 | 2026 | Last issued |
|---|---|---|---|
| Winter Weather Advisory | 156 | 0 | April 29, 2022 |
| Severe Thunderstorm Warning | 57 | 10 | September 2, 2026 |
| Winter Storm Watch | 32 | 0 | April 29, 2022 |
| Winter Storm Warning | 29 | 0 | April 29, 2022 |
| High Wind Warning | 23 | 0 | July 18, 2022 |
| Severe Thunderstorm Watch | 22 | 6 | September 2, 2026 |
| Flood Advisory | 21 | 1 | July 18, 2026 |
| High Wind Watch | 16 | 0 | July 18, 2022 |
| Cold Weather Advisory | 15 | 0 | March 9, 2022 |
| Snow Squall Warning | 15 | 3 | February 17, 2026 |
| Flood Watch | 12 | 0 | August 24, 2022 |
| Heat Advisory | 5 | 0 | September 7, 2022 |
| Dense Fog Advisory | 3 | 0 | April 28, 2022 |
| Flood Warning | 2 | 0 | June 20, 2018 |
| Extreme Cold Warning | 1 | 0 | February 21, 2022 |
| Flash Flood Warning | 0 | 1 | July 1, 2026 |
Tornado history in Jefferson County
1 tornadoes have been recorded in Jefferson County since 1950. That ranks 47 of 56 counties in Montana. The most recent was on August 6, 2023 (rated unknown).
Strongest tornadoes in Jefferson County
| Date | Rating | County | Path length | Width | Deaths | Injuries |
|---|---|---|---|---|---|---|
| August 6, 2023 | ? | Jefferson County | 3.7 mi | 70 yd | 0 | 0 |
Most recent tornadoes
| Date | Rating | County | Path length | Width | Deaths | Injuries |
|---|---|---|---|---|---|---|
| August 6, 2023 | ? | Jefferson County | 3.7 mi | 70 yd | 0 | 0 |
About Jefferson County
- Population: 13,304 (2024 estimate)
- State: Montana
- NOAA Weather Radio SAME code: 030043 (how to use it)