An extremely rare Blizzard Warning is set to go into effect for parts of western Washington on Tuesday. Washington hasn't had this kind of weather alert in more than 10 years. In the Pacific Northwest, Winter Storm Warnings are common. The criteria for a Winter Storm Warning is heavy snow: 6 inches in 12 hours or 8 inches in 24 hours. A Blizzard Warning criteria is the same amount of snow plus wind. The National Weather Service issued the alert and expects the blowing winds will reduce visibility to a quarter of a mile or less for three hours or longer and sustained winds of 35 mph or stronger or frequent gusts of 35 mph or greater. READ MORE: https://www.king5.com/article/weather/rare-blizzard-warning-issued-washington-mountains/281-cca78043-a266-425b-b6f0-cdb16533ec8c