Winter Weather in West Glacier Region, Montana

During this event, the mountains received 6 to 12 inches of snowfall. Following the snow, low temperatures dropped to a range of 25 to 31 degrees in the valleys of Glacier National Park and towards Hungry Horse. West Glacier recorded a low of 28 degrees on May 18.

An unseasonably cold upper-level trough, originally an Aleutian Low/Gulf of Alaska low, was dislodged and sagged south over the Pacific Northwest and Northern Rockies. This system brought a prolonged period of late-season winter weather, including persistent graupel showers, accumulating mountain snow, and record or near-record cold temperatures leading to widespread frost and hard freezes across Western Montana.