988
WWUS86 KSEW 101327
SPSSEW

Special Weather Statement
National Weather Service Seattle WA
527 AM PST Wed Dec 10 2025

WAZ001-301>333-111900-
San Juan County-Cascades of Whatcom and Skagit Counties-
Cascades of Snohomish and Northern King Counties-
Cascades of Southern King County-
Cascades of Pierce and Lewis Counties-
Foothills and Valleys of the North Cascades-
Foothills and Valleys of Snohomish and Northern King Counties-
Foothills and Valleys of Central King County-
Foothills and Valleys of Pierce and Southern King Counties-
Foothills and Valleys of Thurston and Lewis Counties-
Lowlands of Western Whatcom County-
Lowlands of Western Skagit and Northwestern Snohomish Counties-
Downtown Everett / Marysville Area-
Shoreline / Lynnwood / South Everett Area-Eastside-City of Seattle-
Lowlands of Pierce and Southern King Counties-
Olympia and Southern Puget Sound-
Lowlands of Lewis and Southern Thurston Counties-
Middle Chehalis River Valley-Willapa and Black Hills-
Southern Hood Canal-Northern Hood Canal-Eastern Kitsap County-
Port Townsend Area-Eastern Strait of Juan de Fuca-
Western Strait of Juan de Fuca-Lake Crescent Area Including US 101-
Olympics-Foothills of the Western and Southern Olympic Peninsula-
Northern Washington Coast-Grays Harbor County Coast-
Lower Chehalis River Valley-Island County-
527 AM PST Wed Dec 10 2025

...HEAVY RAINFALL THIS WEEK WILL LEAD TO AN INCREASED THREAT OF
LANDSLIDES IN WESTERN WASHINGTON...

Rainfall of up to 8 to 10 inches over the past several days has
increased antecedent soil moisture to high levels across western
Washington. Additional heavy rainfall of 1 to 4 inches across the
lowlands and 4 to 10 inches over the Olympics and Cascades is
expected through late Wednesday. Wet and unsettled conditions are
also favored to continue through the rest of the week. This amount of
rain will put extra pressure on soil instability, leading to an
increased threat of landslides and debris flows, especially from
recent burned areas.

A mudslide was reported along I-90 Monday evening near North Bend,
causing highway closures and extensive delays. More landslides are
possible.

Areas most susceptible to landslides debris flows under these
conditions are steep coastal bluffs, other steep hillsides or
road cuts, and recent burned areas. A diminishing threat of
landslides and debris flows will continue for several days after
the rain ends.

For more information about current conditions, visit
www.weather.gov/seattle, select Hydrology, and then scroll down
for the links to the landslide information pages.

For more information on landslides, visit the website for the
Washington State Department of Natural Resources landslide
geologic hazards at: http://bit.ly/2mtA3wn


$$

www.weather.gov/seattle