Heavy Snow in Lewis and Southern Nez Perce, Idaho

Storm total snowfall reports ranged from 4.2 inches in Nez Perce to between 6 and 7 inches in Winchester.

A couple of upper level shortwaves of lower pressure moved across the area in an unstable northwest flow pattern. Each disturbance generated some weak isentropic ascent across the Idaho Panhandle. Lift across the Central Panhandle Mountains and on the Camas Prairie was enhanced by favorable upslope flow into these areas. The combination of these two factors resulted heavy snowfall accumulations.