Man! 4 inches of snow in 2 hours, the first 2 miles home were a bit stressful...the Marathon Winters were a little shaky in the white stuff where they couldn't get a firm grip. Fishtailed a bit, had to put the foot down once (twisted my knee a bit)...
But once I found some tire tracks, the tires bit in and the last 7 miles were fine.
So notice to self, fresh snow over 2 inches in the morning...don't take bike, in afternoon...ride bike slowly!