Dense Fog Advisory issued December 26 at 2:12PM CST until December 26 at 9:00PM CST by NWS Chicago IL

* WHAT…Visibility less than one mile in dense fog.

* WHERE…Boone, De Kalb, Lee, Ogle, Winnebago, Kane, Lake IL, and
McHenry Counties.

* WHEN…Until 9 PM CST this evening.

* IMPACTS…Low visibility could make driving conditions hazardous.