Washington Mountain Snow and Lowland Rain Through Midweek
Statewide
Periodic showers continue across Washington into Tuesday. A frontal system arrives Tuesday evening through Wednesday, bringing steadier rain to the lowlands and the season’s first widespread mountain snow. Light precipitation lingers at times into late week before a gradual drying trend develops over the weekend.
Western Lowlands
Scattered showers persist at times into Tuesday. Steadier rainfall returns Tuesday night into Wednesday as the front moves through, with the best chances focused on the lowlands. Showers continue through Wednesday night as the system slowly shifts south.
Cascade Mountains
Snow levels start near 4000 to 4500 feet and fall to 3000 to 3500 feet by Wednesday morning, allowing accumulating snow at higher elevations and the main Cascade passes. White Pass and Paradise are expected to see 6 to 12 inches, with local amounts up to 15 inches near Paradise. Stevens and Rainy Passes should pick up 4 to 8 inches, while Snoqualmie Pass may see up to 3 inches. Winter Weather Advisories cover many Cascade zones from Tuesday afternoon through Wednesday afternoon, and mountain travel will be affected.
Eastern Washington
Light rain moves through today into Tuesday morning, with overall amounts generally low. A colder system arrives Tuesday night, dropping snow levels to 2500 to 3000 feet over the Cascades and north-central mountains. Mountain snow begins late Tuesday night and continues through Thursday, creating winter travel conditions at Stevens and Washington Passes where the best chances exist for 6 inches or more. Valley areas see mainly light rain.
Later This Week
An upper low lingering near the coast keeps unsettled conditions going through Friday, with showers at times and light snow accumulations possible in the Cascades and Olympics as snow levels fluctuate between 2500 and 4000 feet. Additional light mountain snow is possible Thursday through Friday, especially around White Pass. Precipitation chances decrease over the weekend as the system weakens, leaving mainly light mountain showers before drier weather becomes more widespread early next week.
