Weather Alerts-

Execute a pre-planned activity identified in the instructions

Chicago - IL, US, National Weather Service

Boone, De Kalb, Lee, Ogle, Winnebago, Kane, and McHenry Counties

...DENSE FOG ADVISORY IN EFFECT UNTIL 11 AM CDT THIS MORNING... WHAT...Visibility less than one quarter mile in dense fog. WHERE...Boone, De Kalb, Lee, Ogle, Winnebago, Kane, and McHenry Counties. WHEN...Until 11 AM CDT this morning. IMPACTS...Low visibility could make driving conditions hazardous. PRECAUTIONARY/PREPAREDNESS ACTIONS... If driving, slow down, use your headlights, and leave plenty of distance ahead of you.