Heavy Snow in Southern Rocky Mountain Front, Montana

A persistent band of moderate to heavy snow resulted in high snow amounts. The Dupuyer Creek and Mount Lockhart Snotels both estimated 7 inches new snow over 12 hours or less. Mount Lockhart estimated 10 inches in 12 hours with Dupuyer Creek reporting 7 inches in 8 hours.

A pair of upper lows became cut off over southern and eastern Montana extending south and east into the Dakotas and Wyoming from a negatively-tilted trough centered off the Pacific Northwest coastline. This cut-off low spun in place through Thursday the 20th. The result was for significant accumulating snow in eastern portions of North-central Montana, with additional heavy snow across much of the rest of Southwest and Central MT.