Scattered thunderstorms moved through southern Wisconsin and northern Illinois late Monday afternoon and evening producing heavy rainfall, frequent lightning and gusty winds. Most of the storm activity has shifted to the east over Lake Michigan, but a few scattered storms continue to rotate around low pressure in southern Wisconsin. As they rotate to the east and southeast, isolated storms will be possible through 9pm with skies turning partly cloudy overnight.
The overall severe threat has greatly diminished this evening with any stronger storms likely producing mostly small hail and heavy rain. There does remain a risk for stronger storms again Tuesday evening with the passage of another boundary/surface trough late in the day. Hail and wind would be the primary weather concerns during that time.