...PATCHY DENSE FOG IS EXPECTED THIS MORNING... Patchy fog is expected during the morning commute. Fog will become locally dense at times and lead to visibility as low as a quarter mile at times. Temperatures will also remain below freezing, which may lead to freezing fog and slippery untreated surface.
Current Watches, Warnings and Advisories for Brown (WIC009) Wisconsin Issued by the National Weather Service
https://alerts.weather.gov/cap/wwacapget.php?x=WI126188AC2744.SpecialWeatherStatement.126188AC9760WI.GRBSPSGRB.7cf993e5980922796fa7f32918ee03c7