National Weather Service United States Department of Commerce

After a period of rain and storms Monday morning, severe potential develops Monday evening into Monday night. Questions remain as to how widespread and how far north this activity will develop, with the best chances along the WI/IL border. Keep up to date with the forecast!
Severe storms Monday evening will be dependent on upstream development, but confidence is increasing in the timing and threats from these storms. Wind and flooding will be the main concerns, with isolated tornadoes and hail possible.
Multiple rounds of rain and storms on Monday will bring a widespread 0.5-1 inch of precipitation across southern Wisconsin. Southeastern Wisconsin currently shows the best chances for up to 2 inches of rainfall (20-30%). Rainfall may lead to urban/small stream flooding and add to or extend existing river flooding.