Low visibility triggers dense fog advisory in northern Illinois

Dense Fog Advisory: 

A Dense Fog Advisory has been issued for a portion of northern Illinois and southern Wisconsin. Included are Winnebago, Boone, McHenry, Ogle, DeKalb, and Lee County in northern Illinois as well as Walworth and Rock County in Wisconsin. 

  

This advisory will run until 11AM as visibility will likely drop to a quarter mile or less. Currently, visibility has rapidly dropped to a half mile or less for most locales. Lowest values are up near the Janesville area with .0 mile visibility. Rockford isn't too far behind with .1 mile visibility. 
 

  

Dense Fog Safety Tips: 

If traveling, slow down and increase your following distance from other vehicles to increase reaction time. Use low-beam headlights or fog lights - never high beams as that can reflect off the fog, further reducing visibility.