12:15 p.m.: Tornado-producing storms were located along a line extending from near Big Bend to Waterford to near Walworth, moving east at 50 mph, the weather service said. 12:13 p.m.: Tornado warning issued for Waukesha, Racine and Kenosha counties. 12:09 p.m.: Severe thunderstorms capable of producing a tornado were located along a line extending from near Menomonee Falls to Mukwonago, moving northeast at 35 mph. 
12:07 p.m.: Tornado warning issued for the southern half of Ozaukee County. 12:02 p.m.: Severe thunderstorms were located along a line extending from near Germantown to near East Troy, moving east at 55 mph. 11:52 a.m.: Additional tornado warning issued for Waukesha County. Severe thunderstorms capable of producing a tornado were located along a line extending from near Lisbon to near Palmyra, moving east at 45 mph. A severe thunderstorm capable of producing a tornado was located near Whitewater, moving southeast at 40 mph. 11:47 a.m.: Tornado warning for Jefferson, Waukesha and Walworth counties. A severe thunderstorm capable of producing a tornado was located near Lac La Belle, or 7 miles west of Okauchee Lake, in western Waukesha County, moving east at 35 mph. 11:31 a.m.: Tornado warning for Waukesha County. 11:28 a.m.: Tornado warning for portions of Jefferson and Waukesha counties. The first of the tornado warnings was issued late Wednesday morning. Here's an approximate timeline of the warnings, according to the National Weather Service: There was little, if any, lightning with the storms, Halbach said. "We weren't really forecasting tornadoes for today," Halbach added. "There was enough wind shear to produce these spin-ups along the cold front. "The ingredients came together for about an hour or two here to produce these short-lived spin-ups," Halbach said. While forecasters were expecting unsettled weather on Wednesday, they were not expecting a tornado outbreak, Halbach said. The storm system was the result of clashing air masses, with warm moist air out ahead of a strong cold front that swept through the region. 
More: 13 tornadoes touched down in Wisconsin in one day in June. Residents posted images on social media from throughout the region of snapped and downed trees as well as patio furniture that was blown over and shingles ripped from roofs. Halbach said the weather service was working on Wednesday afternoon to confirm how many tornadoes occurred.Ī 73 mph wind gust was reported near Cudahy in Milwaukee County and 60 mph gusts were reported near Hartford in Washington County and Delavan in Walworth County. Peak tornado season in southern Wisconsin typically occurs in June, July and August. "It’s nothing that’s unheard of, but it’s just not as often that we see this kind of activity this time of year," Halbach said. By late afternoon on Wednesday, that number had been reduced to 2,600 customers without power, the Milwaukee-based utility said.Ī tornado outbreak in mid-October is unusual for southeast Wisconsin, said Tim Halbach, warning coordination meteorologist with the National Weather Service in Sullivan. Nearly 22,000 We Energies customers were left without power after the storms rolled across the region.
There were no immediate reports of major damage or injuries as a result of the storms.
Watch Video: Tornado sirens sound outside the Waukesha County CourthouseĪn unusual, fast-moving line of severe storms appears to have spawned numerous small, short-lived tornadoes across southeast Wisconsin on Wednesday, the National Weather Service said.
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