Heavy Snow in Gallatin and Madison County Mountains and Centennial Mountains, Montana

Snotel equipment at Black Bear south of West Yellowstone 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.