High Winds and Large Hail Set to Slam Chicago-Milwaukee Corridor — SevereWX

High Winds and Large Hail Set to Slam Chicago-Milwaukee Corridor

Storms are ramping up fast around Lake Michigan, putting southeast Wisconsin, northeast Illinois, southwest Michigan, and northeast Indiana in the crosshairs for severe weather this early afternoon.

The Storm Prediction Center's latest Mesoscale Discussion highlights a bow echo pushing southeast from northeast Wisconsin, plus new clusters firing along a prime instability zone over central Lake Michigan and into northern Illinois. Extreme instability—2000-4000 J/kg MLCAPE—pairs with steep lapse rates and 50+ kt shear, fueling potential for damaging wind swaths up to 80 mph, isolated 1.75-inch hail, and winds approaching 90 mph in any tornado.

Timing remains tricky, but multiple storm clusters could merge into severe threats by midday. SPC pegs watch odds at 60%, with a severe thunderstorm watch likely soon for this bustling region.

Peak threats: 65-80 mph gusts, 1-1.75 inch hail, tornadoes to 90 mph.

Stay weather-aware this afternoon—monitor radar, have a severe weather plan, and know your safe spot. Alerts could drop fast for Chicago, Milwaukee, and shores in between.