Thunderstorms Expected Amid Persistent Rain Showers
Seattle’s Wednesday weather remained unsettled on April 15, 2026. Showers were lighter than Tuesday, but the day still carried risks.
Rain, Thunder Risk, and Sky Breaks
Forecasters warned of scattered afternoon showers. There was a small risk that some cells could produce thunderstorms or brief hail.
The setup features a cold-core upper low battling drier air behind a front. Sunbreaks could appear between the showers.
Winds and Coastal Patterns
Winds were not expected to be severe. Gusts could approach 30 mph in some locations, however.
- Long Beach through Olympia and the islands faced the higher gusts.
- Coastal flow was northwest near Westport and Aberdeen.
- Bremerton and West Seattle saw a temporary southwest wind shift.
- Oak Harbor and the east Cascades slopes experienced more westerly, stronger winds.
Mountain Snow and Travel Advisories
Snow continued across the Cascades early Wednesday morning. Passes received heavy snowfall.
By 3 a.m., Stevens Pass and Alpental had recorded about one foot of new snow. A Winter Storm Warning covered most Cascade mountain locations through the evening.
Chains were required for non-AWD vehicles on Snoqualmie Pass. Travelers were urged to check conditions often and avoid crossings unless their tires met restrictions.
Safety Tips for Drivers
- Carry chains and emergency supplies.
- Verify pass conditions before departure.
- Expect slick roads and lowered visibility at higher elevations.
Short-Term Outlook
Conditions should clear, then turn cold and frosty overnight into Thursday morning. The south Sound and Chehalis Valley were most likely to feel the chill.
Sun is expected Thursday and Friday. Temperatures should climb into the weekend, with increasing cloud cover.
Forecasters are monitoring a system for Sunday. It may remain southwest, or it could bring light, intermittent showers to the region.
Photograph available from Filmogaz.com shows spring snow at Snoqualmie Pass on April 15, 2026.
