January 28, 2014 9:06 am Ice Caves Form in Northern Wisconsin The brutally-cold temperatures are causing ice to form in the Apostle Sea Caves. Local 2:08 Monday evening forecast: Severe weather threat looms 2:34 Forecast: Sunny Monday, but storm threat looms in coming days 2:33 Monday morning weather 2:23 CHICAGO'S FORECAST: Chances for Rain Fill the Work Week 2:20 Chicago Forecast: Cooler end to the weekend