Weather Alert...DENSE FOG ADVISORY IN EFFECT UNTIL 11 AM EST /10 AM CST/ THURSDAY... * WHAT...Visibility one quarter mile or less in dense fog. * WHERE...Portions of northern Indiana, southwest Michigan and northwest Ohio. * WHEN...Until 11 AM EST /10 AM CST/ Thursday. * IMPACTS...Hazardous driving conditions due to low visibility. If driving, slow down, use your headlights, and leave plenty of distance ahead of you.