Waukesha County weather alerts
There are no active weather alerts for Waukesha County, WI right now.
Since 2016 the National Weather Service has issued about 816 alerts that included Waukesha County, roughly 82 a year. The most common is the severe thunderstorm warning (153 from 2016 to 2025). The last tornado warning was issued on August 18, 2026. 39 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 Waukesha County at the moment. This page updates automatically when the National Weather Service issues one. Check neighboring Dodge County, Racine County, Milwaukee County, Washington County.
Waukesha County alert history
Alert events that included Waukesha County or its forecast zones, from the NWS warning archive.
| Alert type | 2016–2025 | 2026 | Last issued |
|---|---|---|---|
| Severe Thunderstorm Warning | 153 | 29 | September 4, 2026 |
| Dense Fog Advisory | 122 | 9 | October 23, 2026 |
| Winter Weather Advisory | 101 | 9 | March 16, 2026 |
| Severe Thunderstorm Watch | 63 | 13 | August 18, 2026 |
| Flood Advisory | 58 | 10 | September 19, 2026 |
| Wind Advisory | 49 | 4 | May 12, 2026 |
| Cold Weather Advisory | 36 | 3 | January 26, 2026 |
| Flood Warning | 31 | 5 | April 18, 2026 |
| Frost Advisory | 29 | 6 | May 11, 2026 |
| Flood Watch | 25 | 4 | September 19, 2026 |
| Winter Storm Warning | 22 | 1 | March 15, 2026 |
| Winter Storm Watch | 19 | 1 | March 15, 2026 |
| Heat Advisory | 18 | 3 | July 27, 2026 |
| Freeze Warning | 15 | 2 | October 17, 2026 |
| Flash Flood Warning | 14 | 5 | September 3, 2026 |
| Tornado Warning | 14 | 11 | August 18, 2026 |
| Tornado Watch | 13 | 3 | April 17, 2026 |
| High Wind Warning | 8 | 1 | March 13, 2026 |
| Extreme Heat Warning | 5 | 1 | June 29, 2026 |
| Extreme Heat Watch | 4 | 1 | June 29, 2026 |
| Snow Squall Warning | 4 | 0 | December 4, 2024 |
| Freeze Watch | 3 | 1 | October 17, 2026 |
| Fire Weather Watch | 3 | 0 | April 13, 2023 |
| High Wind Watch | 2 | 0 | December 16, 2021 |
| Extreme Cold Warning | 2 | 1 | January 23, 2026 |
| Red Flag Warning | 2 | 0 | April 13, 2023 |
| Lake Effect Snow Warning | 1 | 0 | March 13, 2017 |
| Blizzard Warning | 0 | 1 | March 16, 2026 |
| Extreme Cold Watch | 0 | 2 | January 23, 2026 |
Tornado history in Waukesha County
39 tornadoes have been recorded in Waukesha County since 1950, killing 1 people and injuring 43. That ranks 11 of 72 counties in Wisconsin. The most recent was on July 28, 2023 (rated EF1).
Strongest tornadoes in Waukesha County
| Date | Rating | County | Path length | Width | Deaths | Injuries |
|---|---|---|---|---|---|---|
| April 27, 1984 | F4 | Waukesha County | 6.5 mi | 10 yd | 1 | 14 |
| June 5, 1977 | F3 | Fond du Lac County | 69.5 mi | 400 yd | 0 | 8 |
| June 5, 1980 | F3 | Jefferson County | 10.7 mi | 100 yd | 0 | 0 |
| June 15, 1981 | F2 | Jefferson County | 28.7 mi | 50 yd | 0 | 3 |
| June 29, 1969 | F2 | Waukesha County | 13.1 mi | 100 yd | 0 | 0 |
Most recent tornadoes
| Date | Rating | County | Path length | Width | Deaths | Injuries |
|---|---|---|---|---|---|---|
| July 28, 2023 | EF1 | Jefferson County | 1.3 mi | 90 yd | 0 | 0 |
| March 31, 2023 | EF1 | Jefferson County | 2.8 mi | 50 yd | 0 | 0 |
| October 12, 2022 | EF0 | Waukesha County | 0.6 mi | 50 yd | 0 | 0 |
| July 29, 2021 | EF1 | Waukesha County | 0.9 mi | 95 yd | 0 | 0 |
| July 29, 2021 | EF0 | Waukesha County | 2.4 mi | 50 yd | 0 | 0 |
About Waukesha County
- Population: 417,029 (2024 estimate)
- State: Wisconsin
- NOAA Weather Radio SAME code: 055133 (how to use it)