Seattle is starting Wednesday, March 4, 2026, with light rain and temperatures in the low 50s, and things are expected to ramp up by late morning. A mid-day window of showers and possible thunderstorms between about 10 a.m. and 4 p.m. could bring heavier downpours and brief lightning. Forecasters warn that some neighborhoods and commute routes may see faster accumulation, so drivers should be ready for slower than normal afternoon travel.
Afternoon Thunder And Soggy Commutes
Showers are likely to intensify after midmorning, with south-southwest winds around 5–8 mph and a high near 53°F, while many spots hold in the low 50s through the afternoon. According to the National Weather Service, rain has a high chance of sticking around for much of the day, and a Puget Sound convergence zone could concentrate locally heavier showers and a slight chance of thunder. New rainfall totals of a quarter to a half inch are possible in some locations, so commuters should leave extra time and steer clear of standing water on ramps and low spots.
Mountain And Marine Impacts
The National Weather Service has issued a Winter Weather Advisory for the Cascades of Pierce, Lewis, Snohomish and northern King counties, with snow levels starting high before dropping tonight into Thursday. Areas above about 3,500 feet are expected to pick up 7–9 inches of snow, and elevations above 4,500 feet could see up to a foot by Thursday afternoon. The heaviest snowfall is expected over the passes from this afternoon into late tonight. Out on the water, Small Craft Advisories remain in effect, and seas are forecast to build above 10 feet Wednesday night, so recreational boaters and ferry riders should brace for rough conditions and possible delays.
Plan Ahead
Drivers should be prepared for slick pavement and reduced visibility during heavier bursts of rain and are encouraged to pack tire chains or check WSDOT conditions before heading over the passes. Transit riders and airline passengers may see slower bridge crossings and potential flight delays, so it is smart to allow extra time for meetings and connections. We updated this from our storm sneak peek with the latest advisories and timing.
