Storm Record · Jefferson, Waukesha Counties
June 18, 2007: Straight-line wind in Jefferson and Waukesha Counties
What the National Weather Service recorded
On June 18th small clusters of storms moved northeast through southeastern Wisconsin ahead of a cold front. Wet microbursts and macrobursts generated powerful wind gusts of 65 to 87 knots (75 to 100 mph) that toppled large trees, damaged power-lines and power-poles, and pushed over vehicles. Localized flash flooding was reported. Maximum afternoon air temperatures reached the mid to upper 80s with dewpoints in the mid to upper 60s. About 19,400 customers lost electrical service.
Source: NOAA Storm Events Database · episode 7669
Every report, in the Weather Service's words
Where It Hit
| Location | County | Hazard | Size | Report |
|---|---|---|---|---|
| Menomonee Falls (1.5 E) | Waukesha | Wind | 60 mph wind | Powerful thunderstorm winds toppled large trees. Estimated wind gusts were on the order of 52 knots (60 mph). |
| Brookfield (1 SW) | Waukesha | Wind | 60 mph wind | Powerful thunderstorm winds toppled large trees. Estimated wind gusts were on the order of 52 knots (60 mph). One tree landed on the roof of a home, but there was only minor gutter damage. |
| Ft Atkinson (3 E) | Jefferson | Wind | 60 mph wind | Powerful thunderstorm wind gusts toppled several large trees, some up to 18 inches in diameter. |
Service areas this storm touched