Heavy Snow in Upper Blackfoot and Macdonald Pass, Montana

Snotel equipment at Nevada Ridge estimated 10 inches new snow over the duration of the event.

Shortwaves traversing a broader longwave trough across much of the western CONUS brought a round of snow to the region. Most impacts came in/near mountains and across the plains generally west of I-15. Isentropic ascent combined with northwesterly surface winds to result in heavy and blowing snow, especially along the Northern Rocky Mountain front, where short-term (Less than 3 hrs) of whiteout conditions were observed.