Washington County weather alerts
There are no active weather alerts for Washington County, WI right now.
Since 2016 the National Weather Service has issued about 699 alerts that included Washington County, roughly 70 a year. The most common is the dense fog advisory (125 from 2016 to 2025). The last tornado warning was issued on August 18, 2026. 20 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 Washington County at the moment. This page updates automatically when the National Weather Service issues one. Check neighboring Waukesha County, Ozaukee County, Dodge County, Fond du Lac County.
Washington County alert history
Alert events that included Washington County or its forecast zones, from the NWS warning archive.
| Alert type | 2016–2025 | 2026 | Last issued |
|---|---|---|---|
| Dense Fog Advisory | 125 | 9 | October 24, 2026 |
| Severe Thunderstorm Warning | 113 | 32 | September 4, 2026 |
| Winter Weather Advisory | 105 | 9 | April 2, 2026 |
| Wind Advisory | 50 | 3 | May 12, 2026 |
| Severe Thunderstorm Watch | 49 | 9 | August 18, 2026 |
| Cold Weather Advisory | 39 | 3 | January 26, 2026 |
| Flood Advisory | 33 | 7 | September 4, 2026 |
| Frost Advisory | 29 | 6 | May 11, 2026 |
| Flood Watch | 24 | 5 | September 19, 2026 |
| Freeze Warning | 18 | 2 | October 17, 2026 |
| Winter Storm Watch | 18 | 1 | March 15, 2026 |
| Winter Storm Warning | 17 | 1 | March 15, 2026 |
| Heat Advisory | 15 | 3 | July 27, 2026 |
| Tornado Watch | 11 | 4 | April 17, 2026 |
| Flood Warning | 10 | 0 | August 10, 2025 |
| Flash Flood Warning | 10 | 4 | September 3, 2026 |
| High Wind Warning | 6 | 1 | March 13, 2026 |
| Extreme Heat Warning | 4 | 1 | June 29, 2026 |
| Tornado Warning | 4 | 4 | August 18, 2026 |
| Freeze Watch | 3 | 1 | October 17, 2026 |
| Fire Weather Watch | 3 | 0 | April 13, 2023 |
| Snow Squall Warning | 3 | 0 | December 4, 2024 |
| Extreme Heat Watch | 3 | 1 | June 29, 2026 |
| 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 Washington County
20 tornadoes have been recorded in Washington County since 1950, killing 3 people and injuring 65. That ranks 45 of 72 counties in Wisconsin. The most recent was on May 9, 2018 (rated EF0).
Strongest tornadoes in Washington County
| Date | Rating | County | Path length | Width | Deaths | Injuries |
|---|---|---|---|---|---|---|
| April 4, 1981 | F4 | Washington County | 1.8 mi | 100 yd | 3 | 53 |
| June 5, 1977 | F3 | Fond du Lac County | 69.5 mi | 400 yd | 0 | 8 |
| June 1, 2000 | F2 | Dodge County | 17 mi | 120 yd | 0 | 0 |
| April 7, 1980 | F2 | Dodge County | 6.1 mi | 67 yd | 0 | 2 |
| July 21, 1968 | F2 | Washington County | 2 mi | 100 yd | 0 | 0 |
Most recent tornadoes
| Date | Rating | County | Path length | Width | Deaths | Injuries |
|---|---|---|---|---|---|---|
| May 9, 2018 | EF0 | Washington County | 5.2 mi | 50 yd | 0 | 0 |
| August 10, 2015 | EF0 | Washington County | 1 mi | 50 yd | 0 | 0 |
| June 3, 2007 | EF1 | Washington County | 0.5 mi | 50 yd | 0 | 0 |
| June 2, 2007 | EF0 | Washington County | 0 mi | 15 yd | 0 | 0 |
| June 18, 2006 | F1 | Dodge County | 5.8 mi | 400 yd | 0 | 1 |
About Washington County
- Population: 138,727 (2024 estimate)
- State: Wisconsin
- NOAA Weather Radio SAME code: 055131 (how to use it)