Monitor the latest forecasts for updates on this situation.

WINTER STORM WATCH IN EFFECT FROM TUESDAY AFTERNOON THROUGH THURSDAY MORNING ABOVE 500 FEET... * WHAT...Heavy snow expected above 500 feet. Total snow accumulations of 4 to 12 inches below 1500 feet, 18 to 30 inches across the passes, and higher amounts around 3 feet above 5000 feet. * WHERE...Cascade mountains and valleys of Whatcom and Skagit Counties, including Maple Falls, the Mount Baker Ski Area, and Newhalem, Cascade mountains and valleys of Snohomish and King Counties, including Darrington, Skykomish, Stevens Pass, and Snoqualmie Pass and Cascade mountains and valleys of Pierce and Lewis Counties, including the Crystal Mountain Ski Area, Paradise on Mount Rainier, Ashford, Randle, and Packwood. * WHEN...From Tuesday afternoon through Thursday morning. * IMPACTS...Travel could be very difficult in the mountains. * ADDITIONAL DETAILS...Snow levels will begin near sea level, then rise to 1500 to 2500 feet by Wednesday morning.