A winter storm warning is in effect until Wednesday morning in the Washington Cascade passes.
The National Weather Service expects 1 to 2 feet of new snow.
Restrictions, delays and highway closures are possible on Snoqualmie, Stevens and White passes.
The state Transportation Department closed Interstate 90 at the summit of Snoqualmie Pass on Tuesday morning for avalanche control. The highway reopened but has been closed again in both directions between North Bend and Easton because of multiple spinouts and disabled vehicles.