Western Washington is bracing for a sudden weather shift as two storm systems converge, bringing rain and a sharp temperature drop starting Friday, May 29, 2026.
After a brief stretch of warm, sunny days with highs in the 80s, temperatures are expected to plunge nearly 20 degrees on Friday, struggling to reach 60 degrees across the interior.
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Two Systems Merge
An upper-level low pressure system moving northeast from California is merging with a weak Pacific system tracking southeast from the Gulf of Alaska.
This combination will drive onshore winds from the Pacific Ocean, keeping considerable cloud cover over the region alongside scattered showers.
Potential thunderstorms are forecast near the Cascades.
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Conditions are expected to improve slightly over the weekend, with high temperatures rebounding into the mid-to-upper 60s by Sunday as afternoon sunshine increases.
However, the wet pattern will return in time for the upcoming holiday weekend.
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Forecasters from the National Weather Service noted that precipitation is highly probable for Memorial Day, particularly during the afternoon hours, accompanied by wind gusts reaching up to 23 mph.
