Custer County weather alerts
There are no active weather alerts for Custer County, MT right now.
Since 2016 the National Weather Service has issued about 688 alerts that included Custer County, roughly 69 a year. The most common is the severe thunderstorm warning (203 from 2016 to 2025). The last tornado warning was issued on June 16, 2025. 10 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 Custer County at the moment. This page updates automatically when the National Weather Service issues one. Check neighboring Garfield County, Powder River County, Fallon County, Carter County.
Custer County alert history
Alert events that included Custer County or its forecast zones, from the NWS warning archive.
| Alert type | 2016–2025 | 2026 | Last issued |
|---|---|---|---|
| Severe Thunderstorm Warning | 203 | 18 | September 3, 2026 |
| Winter Weather Advisory | 91 | 4 | April 3, 2026 |
| Severe Thunderstorm Watch | 75 | 9 | August 30, 2026 |
| Cold Weather Advisory | 45 | 2 | January 25, 2026 |
| Red Flag Warning | 42 | 8 | September 4, 2026 |
| Fire Weather Watch | 31 | 4 | September 4, 2026 |
| Winter Storm Watch | 31 | 2 | April 2, 2026 |
| High Wind Warning | 28 | 5 | September 14, 2026 |
| High Wind Watch | 20 | 2 | March 11, 2026 |
| Winter Storm Warning | 20 | 1 | March 12, 2026 |
| Dense Fog Advisory | 20 | 2 | November 1, 2026 |
| Heat Advisory | 16 | 1 | July 24, 2026 |
| Flood Watch | 13 | 1 | September 19, 2026 |
| Flood Advisory | 12 | 0 | July 29, 2025 |
| Flash Flood Warning | 10 | 0 | June 16, 2025 |
| Extreme Heat Warning | 7 | 3 | August 1, 2026 |
| Extreme Cold Warning | 6 | 0 | February 17, 2025 |
| Flood Warning | 6 | 0 | June 17, 2022 |
| Blizzard Warning | 4 | 0 | December 15, 2022 |
| Extreme Heat Watch | 4 | 3 | August 1, 2026 |
| Tornado Watch | 3 | 0 | June 29, 2020 |
| Tornado Warning | 1 | 0 | June 16, 2025 |
Tornado history in Custer County
10 tornadoes have been recorded in Custer County since 1950. That ranks 18 of 56 counties in Montana. The most recent was on May 31, 2014 (rated EF0).
Strongest tornadoes in Custer County
| Date | Rating | County | Path length | Width | Deaths | Injuries |
|---|---|---|---|---|---|---|
| July 18, 1962 | F2 | Prairie County | 40.6 mi | 10 yd | 0 | 0 |
| July 11, 1965 | F2 | Custer County | 5.4 mi | 67 yd | 0 | 0 |
| June 25, 1975 | F2 | Custer County | 0.1 mi | 10 yd | 0 | 0 |
| July 8, 2013 | EF1 | Custer County | 0.6 mi | 100 yd | 0 | 0 |
| May 11, 1989 | F0 | Custer County | 0.2 mi | 10 yd | 0 | 0 |
Most recent tornadoes
| Date | Rating | County | Path length | Width | Deaths | Injuries |
|---|---|---|---|---|---|---|
| May 31, 2014 | EF0 | Custer County | 0.1 mi | 25 yd | 0 | 0 |
| July 8, 2013 | EF1 | Custer County | 0.6 mi | 100 yd | 0 | 0 |
| August 26, 1995 | F0 | Custer County | 0.1 mi | 10 yd | 0 | 0 |
| July 24, 1993 | F0 | Custer County | 0.1 mi | 10 yd | 0 | 0 |
| June 24, 1991 | F0 | Custer County | 0.2 mi | 10 yd | 0 | 0 |
About Custer County
- Population: 11,964 (2024 estimate)
- State: Montana
- NOAA Weather Radio SAME code: 030017 (how to use it)