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Storm Record · Dane, Jefferson, Walworth, Waukesha Counties

July 30, 2012: Hail across four counties

1″
Largest hail
64mph
Strongest gust
7
NWS reports

What the National Weather Service recorded

The month ended with several lines of strong and severe thunderstorms crossing Southeast Wisconsin during the late evening hours of July 30th into the early morning hours of July 31st. Hail up to 1.50 inch in diameter and damaging wind gusts up to 65 mph affected Fond Du Lac County with the first line, with a second line hitting locations along and south of the Interstate 94 corridor from Dane County east to Lake Michigan. WE Energies reported 15,000 customers were without power.

Source: NOAA Storm Events Database · episode 67482

Every report, in the Weather Service's words

Where It Hit

Location County Hazard Size Report
La Grange (3 ENE) Walworth Wind 64 mph wind The Walworth 911 Call Center received numerous reports of trees blown down by thunderstorm wind gusts estimated to be 65 mph (56 knots). A road was blocked by a fallen tree.
Palmyra Jefferson Wind 60 mph wind A trained spotter in Palmyra reported thunderstorm wind gusts estimated to be 60 mph (52 knots).
Muskego (6 SW) Waukesha Wind 60 mph wind Law enforcement officials reported a tree blown down by thunderstorm wind gusts estimated to be 60 mph (52 knots) near the intersection of Big Bend Road and North Lake Drive.
Sun Prairie Dane Hail 1" hail Law enforcement officers reported large hail, estimated to be 1 inch in diameter, fell in Sun Prairie.
Sun Prairie (1 NW) Dane Hail 1" hail A trained spotter reported large hail, measured to be 1 inch in diameter, that fell 1 mile northwest of Sun Prairie.
Marshall (3 SE) Dane Hail 1" hail The public reported large hail, measured to be 1 inch in diameter, that fell 3 miles southeast of Marshall.
North Prairie (2 E) Waukesha Hail 1" hail A trained spotter reported large hail, measured to be 1 inch in diameter, that fell 2 miles east of North Prairie.
Source: NOAA Storm Events Database, Wisconsin

Service areas this storm touched