UPDATE SUN. 11/11/12: The National Weather Service has upped its forecast for total snow accumulations at local mountain passes from tonight’s storm: 6-9 INCHES AT STEVENS PASS, SNOQUALMIE PASS AND WHITE PASS. 8-16 INCHES ON THE NORTH CASCADES HIGHWAY, CHINOOK PASS, MOUNT BAKER, AND PARADISE AND SUNRISE IN MOUNT RAINIER NATIONAL PARK.
ORIGINAL POST: A potent pacific frontal system is approaching the Pacific Northwest and will impact Washington and Oregon. The National Weather Service has issued a winter weather advisory for snow which is in effect from 1pm Sunday to Noon pst Monday above 2500 ft. All mountain passes will be affected including Snoqualmie Pass, Stevens Pass, White Pass, as well as Mount Baker, Mount Rainier.
* TIMING: SNOW WILL BEGIN ON SUNDAY AFTERNOON. INTENSITY WILL PEAK ON SUNDAY EVENING…THEN TAPER OFF AROUND MID-DAY MONDAY.
* ACCUMULATIONS: 4 TO 8 IN. IN THE PASSES. 8 TO 16 IN. AT MOUNT BAKER AND PARADISE, MOUNT RAINIER. A PERIOD OF FREEZING RAIN IS POSSIBLE IN THE PASSES LATE SUNDAY NIGHT AND MONDAY MORNING.
* SNOW LEVEL: NEAR 2500 FT AT THE ONSET OF PRECIPITATION ON SUNDAY AFTERNOON. SNOW LEVEL WILL RISE TO NEAR 4000 FT ON MONDAY MORNING.