Great Falls, Montana – Summer may be on the calendar, but travelers, campers and hikers in southwest Montana’s high country should prepare for winter conditions as accumulating mountain snow returns late this weekend.
According to the National Weather Service in Great Falls, a Winter Weather Advisory is in effect from midnight Sunday through noon Monday for the Gallatin and Madison County Mountains, Centennial Mountains, Northwest Beaverhead County and the Ruby and Southern Beaverhead Mountains.
Periods of wet snow are expected to develop overnight Sunday and continue into Monday, with up to 4 inches of accumulation above 6,500 feet. Snow levels will be lowest during the overnight and early morning hours, increasing the likelihood of accumulating snow across higher mountain passes and backcountry areas.
The advisory includes popular recreation areas and travel routes near Big Sky, West Yellowstone, Wisdom, Wise River, Targhee Pass, Monida Pass, Big Hole Pass, Raynolds Pass, Chief Joseph Pass and Dewey.
Forecasters warn that cold, wet conditions will significantly increase the risk of hypothermia for anyone unprepared for winter weather. Wet snow may also weigh down tree branches, creating blocked forest roads and difficult access to remote campsites. Even a few inches of heavy snow can collapse tents and damage camping equipment.
Anyone heading into the mountains this weekend should pack winter clothing, waterproof gear and emergency supplies. Officials recommend carrying tire chains, blankets, extra food and water, a flashlight, a shovel and a first aid kit in case travel becomes difficult.
The Winter Weather Advisory remains in effect through noon Monday, and additional forecast updates may be issued if snowfall amounts or impacts increase.
