Heavy snows dumped more than a foot of snow on the valley floor in Jackson Hole Saturday, and as much as three feet in the mountains, closing roads for a time and causing flights at the airport to be canceled. An accident on Teton Pass led to the closure of the highway there for several hours in the middle of the day. Farther west, Fremont County Search and Rescue teams helped stranded motorists on Highway 20 after a storm closed the road late Friday. Some motorists were stranded for as long as 18 hours in Island Park between Ashton, Idaho and the Montana state line because of zero visibility. Wind chills dipped to 25 degrees below zero. Rescuers on snowmobiles delivered meals, water and fuel to the stranded motorists Saturday afternoon.