Severe thunderstorms with winds up to 100 mph tore through Wisconsin and Illinois Wednesday.
More than 200,000 utility customers were left without electricity Wednesday after a powerful line of severe thunderstorms swept across parts of Wisconsin and Illinois, bringing destructive winds, widespread damage and renewed concerns about a larger severe weather outbreak unfolding across the Midwest.
Forecasters warned that the dangerous weather pattern is far from over, with additional rounds of strong storms expected to develop through Thursday. The multiday event has placed millions of people at risk as meteorologists continue to monitor conditions capable of producing damaging wind gusts, large hail, isolated tornadoes and flash flooding.
The latest storms caused significant disruptions across both states, knocking out power to homes and businesses while prompting urgent weather alerts from the National Weather Service.
Severe storms race through Wisconsin and Illinois
The strongest storms moved through portions of Wisconsin and northern Illinois during the afternoon and evening hours, generating dangerous conditions across a wide area.
Nearly all of Wisconsin and large sections of Illinois were placed under severe thunderstorm watches or warnings as meteorologists tracked an intense line of storms moving rapidly northeast.
One warning issued for parts of eastern Wisconsin highlighted the threat of winds approaching 90 mph, with forecasters cautioning that the storm system could produce damage similar to that seen during weaker tornadoes. Communities around Lake Winnebago and nearby population centers faced some of the most serious weather conditions as the storm line advanced.
Officials warned residents to seek shelter immediately as the storms approached, citing the risk of airborne debris, downed trees and extensive damage to buildings and infrastructure.
More than 200,000 customers lose electricity
As the storms intensified, power outages quickly spread throughout both states.
Wisconsin reported more than 92,000 customers without electricity during the height of the storm activity. Utility companies across the state experienced service interruptions as strong winds toppled trees and damaged power lines.
Several major providers reported thousands of outages, with some of the largest impacts affecting customers served by regional energy companies throughout southern and central Wisconsin.
Illinois experienced even greater disruption. Nearly 120,000 customers lost power as severe weather crossed the state. Northern and northeastern Illinois recorded the highest concentration of outages, with significant service interruptions affecting communities across the region.
The combined outage total surpassed 200,000 customers, making the event one of the most disruptive weather incidents of the week.
Millions remain under severe weather threats
The storms affecting Wisconsin and Illinois are part of a broader weather system stretching across much of the Midwest.
Weather experts estimate that more than 200 million people could experience some level of severe weather risk as the pattern continues. Major metropolitan areas including Chicago, Milwaukee and Green Bay remain vulnerable to repeated rounds of thunderstorms over the coming days.
Meteorologists have warned that the atmosphere remains favorable for dangerous storm development. Conditions could support wind gusts reaching 100 mph in some locations, along with large hail and isolated tornadoes.
Heavy rainfall also remains a concern, particularly in areas that experience multiple rounds of storms. Saturated ground conditions could increase the risk of flash flooding in vulnerable communities.
Wisconsin sees some of the most significant damage
Wisconsin appeared to bear the brunt of the initial outbreak.
Several counties reported widespread power failures as severe winds moved through populated areas. Early reports indicated thousands of outages in Winnebago County alone, with neighborhoods in and around Oshkosh experiencing extensive disruptions.
Emergency crews worked to assess damage and restore service as quickly as possible. Utility companies continued responding to downed power lines and fallen trees throughout the evening.
Residents across the state were encouraged to remain indoors and avoid unnecessary travel while cleanup efforts began.
What happens next
Forecasters caution that Wednesday’s storms may only be the beginning of an extended severe weather threat.
While individual thunderstorm warnings typically expire as storms move through an area, the larger atmospheric pattern fueling the outbreak remains in place. Additional storms could develop overnight and continue into Thursday, bringing fresh threats to communities already dealing with power outages and storm damage.
Weather officials are urging residents across the Midwest to stay alert for updated forecasts and emergency alerts. New severe thunderstorm warnings, tornado watches and flash flood advisories could be issued with little advance notice as conditions continue to evolve.
For many communities across Wisconsin and Illinois, recovery efforts are already underway. However, with more severe weather possible in the coming hours, emergency managers and utility crews remain on high alert as the region braces for what could be another active day of storms.