Severe Thunderstorms in Illinois and Wisconsin Cause Widespread Outages

Severe thunderstorms struck parts of Illinois and Wisconsin on Wednesday, leaving over 200,000 residents without power. The National Weather Service (NWS) issued urgent warnings due to the destructive winds. The storm is part of a larger weather system affecting the Midwest, with alerts expected through Thursday. AccuWeather reported that over 200 million people might face severe weather conditions, including major cities like Chicago, Milwaukee, and Green Bay.

Weather Threats and Forecast

Meteorologists warned of several hazards, including wind gusts reaching 100 mph, large hail, potential tornadoes, and heavy rain that might lead to flash flooding. Nearly all of Wisconsin and parts of Illinois were under thunderstorm warnings by late Wednesday afternoon.

Warnings and Impacted Regions

The NWS office in Green Bay issued a severe thunderstorm warning at 3:38 p.m. local time, cautioning against tornado-like wind speeds in Calumet and Winnebago counties. The storms were moving northeast at approximately 60 mph and affecting regions such as Appleton and Menasha. Forecasters described these storms as life-threatening, with expectations of heavy damage to homes, businesses, and infrastructure, along with significant tree damage.

Power Outages and Current Conditions

By 3:54 p.m. Central time, over 92,000 customers in Wisconsin were without power, representing about 3.1% of tracked users, according to poweroutage.us. Major affected utilities include:

• Alliant Energy: Nearly 44,000 outages
• We Energies: Over 21,000 outages
• Madison Gas & Electric: Over 10,000 outages
• Xcel Energy and Wisconsin Public Service: Several thousand outages

Southern and central Wisconsin, particularly Winnebago County, experienced severe disruptions. In Illinois, outages were even higher, with nearly 120,000 reported by 5:13 p.m. Eastern time. Will County in Northeastern Illinois was a significant area affected. Major utilities impacted include:

• Commonwealth Edison Company: Over 105,000 outages
• Ameren: Over 10,000 outages
• Jo-Carroll Energy: Over 2,000 outages

Future Developments and Safety Precautions

Thunderstorm warnings are typically brief, yet the broader threat persists. Forecasters anticipate the atmospheric conditions causing Wednesday’s storms to continue into Thursday. Residents should stay alert for up-to-date alerts as further storms with damaging winds, hail, or tornadoes might develop swiftly.

Tornado and thunderstorm watches remain in place across the Plains and Midwest as of 5 p.m. Eastern time. Residents are advised to monitor weather updates regularly.