Walworth County weather alerts
There are no active weather alerts for Walworth County, WI right now.
Since 2016 the National Weather Service has issued about 749 alerts that included Walworth County, roughly 75 a year. The most common is the severe thunderstorm warning (144 from 2016 to 2025). The last tornado warning was issued on July 27, 2026. 38 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 Walworth County at the moment. This page updates automatically when the National Weather Service issues one. Check neighboring Waukesha County, Rock County, Kenosha County, McHenry County.
Walworth County alert history
Alert events that included Walworth County or its forecast zones, from the NWS warning archive.
| Alert type | 2016–2025 | 2026 | Last issued |
|---|---|---|---|
| Severe Thunderstorm Warning | 144 | 36 | August 11, 2026 |
| Dense Fog Advisory | 119 | 12 | October 23, 2026 |
| Winter Weather Advisory | 87 | 8 | March 16, 2026 |
| Severe Thunderstorm Watch | 68 | 14 | August 21, 2026 |
| Wind Advisory | 46 | 4 | May 12, 2026 |
| Cold Weather Advisory | 37 | 3 | January 26, 2026 |
| Frost Advisory | 32 | 5 | May 11, 2026 |
| Flood Advisory | 28 | 8 | August 10, 2026 |
| Flood Watch | 23 | 4 | September 19, 2026 |
| Heat Advisory | 22 | 3 | July 27, 2026 |
| Tornado Warning | 22 | 14 | July 27, 2026 |
| Winter Storm Warning | 19 | 1 | March 15, 2026 |
| Tornado Watch | 19 | 5 | June 17, 2026 |
| Winter Storm Watch | 18 | 1 | March 15, 2026 |
| Freeze Warning | 15 | 2 | October 17, 2026 |
| Flash Flood Warning | 8 | 6 | August 10, 2026 |
| Flood Warning | 8 | 4 | April 18, 2026 |
| High Wind Warning | 7 | 1 | March 13, 2026 |
| Extreme Heat Warning | 6 | 1 | June 29, 2026 |
| Extreme Heat Watch | 4 | 1 | June 29, 2026 |
| Freeze Watch | 3 | 1 | October 17, 2026 |
| Fire Weather Watch | 3 | 0 | April 13, 2023 |
| Red Flag Warning | 3 | 0 | April 13, 2023 |
| High Wind Watch | 2 | 0 | December 16, 2021 |
| Extreme Cold Warning | 2 | 1 | January 23, 2026 |
| Snow Squall Warning | 2 | 0 | February 19, 2022 |
| Blizzard Warning | 1 | 1 | March 16, 2026 |
| Ice Storm Warning | 1 | 0 | February 22, 2023 |
| Extreme Cold Watch | 0 | 2 | January 23, 2026 |
Tornado history in Walworth County
38 tornadoes have been recorded in Walworth County since 1950, injuring 20 people. That ranks 12 of 72 counties in Wisconsin. The most recent was on June 22, 2024 (rated EF1).
Strongest tornadoes in Walworth County
| Date | Rating | County | Path length | Width | Deaths | Injuries |
|---|---|---|---|---|---|---|
| January 7, 2008 | EF3 | Walworth County | 10.8 mi | 200 yd | 0 | 15 |
| March 21, 1966 | F2 | Walworth County | 33.1 mi | 200 yd | 0 | 1 |
| September 22, 1961 | F2 | Rock County | 6.9 mi | 220 yd | 0 | 1 |
| April 18, 1955 | F2 | Walworth County | 3.3 mi | 10 yd | 0 | 1 |
| April 19, 1957 | F2 | Walworth County | 2.7 mi | 50 yd | 0 | 2 |
Most recent tornadoes
| Date | Rating | County | Path length | Width | Deaths | Injuries |
|---|---|---|---|---|---|---|
| June 22, 2024 | EF1 | Walworth County | 6 mi | 150 yd | 0 | 0 |
| June 22, 2024 | EF1 | Walworth County | 5.3 mi | 100 yd | 0 | 0 |
| May 7, 2024 | EF1 | Walworth County | 1 mi | 50 yd | 0 | 0 |
| June 1, 2023 | ? | Walworth County | 0 mi | 10 yd | 0 | 0 |
| April 5, 2023 | EF0 | Walworth County | 0.5 mi | 75 yd | 0 | 0 |
About Walworth County
- Population: 106,029 (2024 estimate)
- State: Wisconsin
- NOAA Weather Radio SAME code: 055127 (how to use it)