Weather service warns of potential atmospheric river next week
Oct 17, 2025, 4:00 AM | Updated: 7:09 am
Some commuters carry umbrellas as they wait for buses in Rainier Square on 4th Avenue during evening rush hour in Seattle. (Photo: Robert Sumner, Getty Images)
(Photo: Robert Sumner, Getty Images)
Rainfall is making its grand debut in the Pacific Northwest as early as Friday and is expected to continue into next week.
The National Weather Service (NWS) Seattle is warning of a potential atmospheric river west of the Cascades starting in the middle of next week.
Potential atmospheric river could start next week
The Climate Prediction Center indicates a moderate (40-60%) risk of heavy rain, high winds, and heavy mountain snow from Oct. 23-27. However, it could start as early as Oct. 22.
High winds are expected to be most prominent along the Pacific Coast of Washington and Oregon, but are not expected to be felt anywhere else in western Washington.
“Heavy rainfall will have the potential to produce flooding west of the Cascades in Washington and Oregon,” NWS stated in a news release. “However, confidence in the extent and severity of any flooding remains low at this time.”
Western WA weekend weather predictions
As for this weekend, NWS is predicting a brief round of heavy rain and gusty winds.
Although the strength of the fall system has weakened slightly, and river flooding is unlikely, the weather service still recommended monitoring sensitive rivers, creeks, and burn scars.
Friday night is forecast to be partly cloudy, with a low around 45 degrees, accompanied by light winds.
There is a 50% chance of rain on Saturday, mainly after 11 a.m. The high will be near 57 degrees. The chance of rain will increase to 100% on Saturday night, with a low of 50 degrees.
Sunday will have showers with a high near 58 degrees. Sunday night will also be rainy and mostly cloudy, with a low around 49 degrees.
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Snow possible in the mountains
With avid skiers and snowboarders itching to get out again, NWS stated that heavy mountain snow is possible at high elevations in the Cascades. Though it’s still too early to determine exact snow levels, the weather service noted that atmospheric river conditions often result in snow levels rising above the mountain passes.
Crystal Mountain Resort is projected to open on Nov. 28, while Stevens Pass’ opening date is scheduled for Dec. 5, according to The Seattle Times.
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