WASHINGTON — SEATTLE FORECAST
Morning Low: 46
Afternoon High: 55
Following the wettest day in Seattle in nearly two years (since Dec. 5, 2023) with over one inch of rainfall, we’re seeing the last organized band of showers move through just before 10 p.m.
The overnight hours will be pretty quiet but another weather system – a low-pressure system moving northeast toward Vancouver Island – will spin more rain showers and downpours into Western Washington on Saturday, though the rain will be off and on.
The rainfall rates shouldn’t be enough to cause any significant flooding concerns, though clogged drains could mean standing water where that occurs.
A Wind Advisory has been issued due to expected windy conditions Saturday afternoon and especially Saturday evening inland.
The best probability forecast outcome is a burst of wind from 40-55 mph at the central and south coast in the early to mid afternoon hours, then inland we could see some 35-45 mph wind gusts in parts of the South Sound and through the southern section of the area near or after sunset.
If this band of wind materializes, it would swing north through Puget Sound well after dark. Any wind gusts over 40mph could cause some small branches or twigs to break, and possibly a few very weak or dead trees to topple.
The exact timing of strong winds away from the coast is still somewhat uncertain, though the period of heightened risk for the Puget Sound region is from 6 pm to midnight, from south to north. Also, the onset of stronger winds in any one location could be rather sudden instead of a gradual increase. Make sure devices are charged in case you lose power! Winds will subside into Sunday morning.
Snow levels in the mountains on Saturday will fall to around 4,000 feet by evening so we could get some accumulating snow around Stevens Pass by Saturday evening, and snow levels will start fall to 3,000 to 3,500 feet through the day for a few inches of slushy snow at Snoqualmie Pass.
It is notable that the snow or slush will not be falling constantly, just at times. Travel conditions could be difficult at times at Stevens Pass Saturday night through Sunday though I-90 at Snoqualmie Pass might just remain wet.
Sunday rainfall in the lowlands won’t be heavy but be a nuisance, as winds also won’t be a factor.
Highs in the lowlands this weekend will be in the lower to mid 50s, some of the coolest temperatures for highs of the season!
We could have isolated rain showers Monday but a bit of a break, then some rainy weather continues through the week with some periods of snow or rain/snow at the passes. No weather feature next week looks significant at this time, but we are in an overall very active October weather pattern so we will be on watch for anything that crops up. Highs next week will be in the 50s in the lowlands.
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