If you must travel, keep an extra flashlight, food, and water in your vehicle in case of an emergency.

* WHAT...Heavy snow above 1000 feet. Additional snow accumulations of up to 2 to 4 feet. Winds gusting as high as 40 to 50 mph. * WHERE...Cascade mountains and valleys of Whatcom and Skagit Counties, including Maple Falls, the Mount Baker Ski Area, Newhalem, Lyman, and Concrete, Cascade mountains and valleys of Snohomish and King Counties, including Darrington, Index, 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...Until 4 PM PST Thursday. * IMPACTS...Travel could be very difficult. Strong winds could cause tree damage.