Værmelding for Madison Post Office (historical)

Dense Fog Advisory issued January 8 at 2:11AM MST until January 8 at 11:00AM MST by NWS Great Falls MT* WHAT...Visibility less than one half mile in dense fog for someareas.* WHERE...The Interstate 90 Corridor between Bozeman and Whitehall,Upper Blackfoot and MacDonald Pass, Helena Valley, and CanyonFerry Area.* WHEN...Until 11 AM MST this morning.* IMPACTS...Low visibility and slippery roadways will make drivingconditions hazardous.If driving, slow down, use your headlights, and leave plenty ofdistance ahead of you.

National Weather Service