...DENSE FOG ADVISORY NOW IN EFFECT UNTIL 9 AM CST THIS MORNING... The Dense Fog Advisory is now in effect until 9 AM CST this morning including Fond du Lac and Dodge counties * VISIBILITY...Less than one quarter mile at times. * IMPACTS...Fog is resulting in rapid changes in visibility across the area, with visibility falling below one quarter mile at times. Brief improvement to the visibility can be expected within rain showers. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Dense Fog Advisory means visibilities will frequently be reduced to less than one quarter mile. If driving...slow down... use your headlights...and leave plenty of distance ahead of you.