Rain and snow through Friday for SW Montana By: Mike Heard and last updated 2021-05-19 15:27:36-04 BOZEMAN â The weather forecast is looking good for widespread moisture to impact most of western, SW, and central Montana through Friday and possibly into the weekend. Along the Rocky Mountain Front and Continental Divide will see the higher amounts of snow and for those mountain peaks above 8,000â there could be over a foot of heavy wet snow. Most mountain passes will see some snow locally in SW Montana. MacDonald Pass, Homestake Pass, Boulder Hill, Elk Park, and Georgetown Lake areas could see 2â-10â of snow.