* WHAT...HEAVY SNOW POSSIBLE ABOVE 3000 FEET. TOTAL SNOWACCUMULATIONS 8 TO 16 INCHES, WITH OVER 2 FEET POSSIBLE NEAR MOUNTAIN SUMMITS. A TRACE TO 6 INCHES OF SNOW WILL BE POSSIBLE ABOVE 2500 FEET BY FRIDAY EVENING.

* WHERE...CASCADE MOUNTAINS AND VALLEYS ABOVE 3000 FEET FROM MOUNT RAINIER TO THE CANADA BORDER. THIS INCLUDES SNOQUALMIE PASS (I-90), STEVENS PASS (US-2), WHITE PASS (US-12), WASHINGTON PASS (SR-20), MOUNT BAKER SKI AREA, CRYSTAL MOUNTAIN SKI AREA, AND PARADISE ON MOUNT RAINIER.

* WHEN...FROM THURSDAY MORNING THROUGH FRIDAY EVENING. THE HEAVIEST SNOWFALL IS EXPECTED THURSDAY EVENING THROUGH THURSDAY NIGHT WITH SNOWFALL RATES UP TO 1 INCH PER HOUR. SNOW SHOWERS, SOME POTENTIALLY HEAVY, WILL PERSIST THROUGH FRIDAY.

* ADDITIONAL DETAILS...TRAVEL, ESPECIALLY WITH ADDITIONAL HOLIDAY TRAFFIC, COULD BE VERY DIFFICULT ACROSS MOUNTAIN PASSES THURSDAY THROUGH FRIDAY.