NORTH BEND — Snoqualmie Pass shut down overnight Sunday into Monday morning due to severe weather that caused multiple crashes, including one wreck that killed a pregnant woman. A Mitsubishi Galant hit a guardrail and then crashed 20 feet down an embankment Sunday night near North Bend, hurting a Moses Lake family. Authorities said 27-year-old Alyssa Helfenstein and her unborn child died while her husband and two other children in the car were hospitalized with non-life-threatening injuries. The National Weather Service’s winter weather advisory remains in effect through 11 a.m.