Jefferson County weather alerts
There are no active weather alerts for Jefferson County, ID right now.
Since 2016 the National Weather Service has issued about 155 alerts that included Jefferson County, roughly 16 a year. The most common is the severe thunderstorm warning (84 from 2016 to 2025). The last tornado warning was issued on August 13, 2024. 19 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 Bonneville County, Fremont County, Clark County, Butte 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 |
|---|---|---|---|
| Severe Thunderstorm Warning | 84 | 13 | September 18, 2026 |
| Flood Advisory | 31 | 0 | September 3, 2023 |
| Flood Warning | 20 | 0 | June 13, 2024 |
| Tornado Warning | 9 | 0 | August 13, 2024 |
| Snow Squall Warning | 5 | 0 | March 10, 2023 |
| Severe Thunderstorm Watch | 5 | 1 | May 13, 2026 |
| Flash Flood Warning | 1 | 6 | September 18, 2026 |
Tornado history in Jefferson County
19 tornadoes have been recorded in Jefferson County since 1950. That ranks 2 of 44 counties in Idaho. The most recent was on October 27, 2025 (rated EF0).
Strongest tornadoes in Jefferson County
| Date | Rating | County | Path length | Width | Deaths | Injuries |
|---|---|---|---|---|---|---|
| March 23, 1988 | F1 | Jefferson County | 15 mi | 40 yd | 0 | 0 |
| May 31, 1997 | F1 | Jefferson County | 4 mi | 200 yd | 0 | 0 |
| April 17, 1988 | F1 | Jefferson County | 2 mi | 60 yd | 0 | 0 |
| April 17, 1988 | F1 | Jefferson County | 0.5 mi | 30 yd | 0 | 0 |
| June 2, 1992 | F1 | Jefferson County | 0.5 mi | 23 yd | 0 | 0 |
Most recent tornadoes
| Date | Rating | County | Path length | Width | Deaths | Injuries |
|---|---|---|---|---|---|---|
| October 27, 2025 | EF0 | Jefferson County | 0.1 mi | 50 yd | 0 | 0 |
| May 31, 2018 | EF0 | Jefferson County | 3 mi | 10 yd | 0 | 0 |
| July 11, 2015 | EF0 | Jefferson County | 7.4 mi | 10 yd | 0 | 0 |
| May 10, 2014 | EF0 | Jefferson County | 0 mi | 15 yd | 0 | 0 |
| May 7, 2013 | EF0 | Jefferson County | 1.2 mi | 5 yd | 0 | 0 |
About Jefferson County
- Population: 34,854 (2024 estimate)
- State: Idaho
- NOAA Weather Radio SAME code: 016051 (how to use it)