A middle-of-the-night tornado warning sent Milwaukee-area residents scrambling for basements early Tuesday as a fast-moving line of severe thunderstorms barreled across southeast Wisconsin, triggering sirens, phone alerts and some very abrupt wake-up calls.
The National Weather Service in Milwaukee/Sullivan issued the tornado warning at 1:38 a.m. CDT, saying a storm capable of producing a tornado was located near Cedarburg and moving east at about 45 mph. The warning was allowed to expire shortly after 2 a.m., according to the National Weather Service. Forecasters cautioned about "flying debris" and the possibility that mobile homes and roofs could be destroyed.
Severe Thunderstorm Watch and Fast Line
Beyond the tornado threat, a broader line of severe thunderstorms fired off multiple severe thunderstorm warnings across Milwaukee, Racine, Waukesha and neighboring counties. A Severe Thunderstorm Watch stayed in effect for much of southeast Wisconsin until 4 a.m., according to WTMJ. Radar and forecast products showed the squall racing east at roughly 50 mph, with gusts to 60 mph possible, the warnings said.
Where the Storms Tracked and the Risks
National Weather Service bulletins put a long list of communities in the storm's path, from Mequon, Brown Deer and Grafton down through Oak Creek, South Milwaukee, Mount Pleasant and Racine. The alerts warned of damage to roofs, siding, trees and outbuildings and urged anyone under a warning to head to a basement or interior room on the lowest floor and to stay away from windows while the storms passed, per National Weather Service guidance.
The powerful winds also took a bite out of the power grid. We Energies told the Milwaukee Journal Sentinel that roughly 57,000 customers across the state were without service in the immediate aftermath, and crews were working to restore electricity. Customers can report outages through the utility's outage map, and local officials urged residents to treat any downed lines as live and to report hazards to emergency services.
The overnight scare fits into a broader pattern of rising severe-weather risk in parts of Wisconsin that was highlighted earlier this year in tornado alley creeps into Wisconsin. Officials repeated the usual but essential preparedness advice: have multiple ways to receive alerts, know your safest interior shelter spot and secure loose outdoor items ahead of storms. This story will be updated as damage assessments and restoration timelines are released, and residents in affected areas are urged to monitor local emergency channels for the latest information.
