Dense fog through the Monday morning commute

A Dense Fog Advisory has been issued for all of northern Illinois and southern Wisconsin as visibility continues to fall below a mile in a few spots Sunday night.

Temperatures are also falling to the freezing mark which could cause the fog to freeze on elevated surfaces through Monday morning's commute. 

The fog will last through mid-morning, holding temperatures in the 30's.  Fog will be likely again Monday night into Tuesday.