Snowfall totals in Washington’s mountain regions over the past 24 hours have been remarkable. Snowstorm Blankets Washington’s Mountain Passes as Winter Weather Continues. Washington’s mountain regions in the past 24 hours have been hit with heavy snowfall, according to the National Weather Service (NWS) Seattle. A large storm offshore is responsible for bringing a flurry of winter weather to the Evergreen State over the weekend. These big snow totals over the last 24 hours could mean big business for ski resorts at just the right time.