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WWUS86 KSEW 172333
SPSSEW
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE SEATTLE WA
333 PM PST WED DEC 17 2025
WAZ001-301>333-190000-
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-
333 PM PST WED DEC 17 2025
...HEAVY RAINFALL ON WILL LEAD TO AN INCREASED THREAT OF
LANDSLIDES IN WESTERN WASHINGTON...
SIGNIFICANT RAINFALL OVER THE PAST WEEK HAS INCREASED SOIL MOISTURE
TO HIGH LEVELS ACROSS WESTERN WASHINGTON. ADDITIONAL RAINFALL OF 1
TO 2 INCHES IS EXPECTED THROUGH FRIDAY. THIS AMOUNT OF RAIN WILL
CONTINUE TO PUT EXTRA PRESSURE ON SOIL INSTABILITY, LEADING TO AN
INCREASED THREAT OF LANDSLIDES AND DEBRIS FLOWS, ESPECIALLY FROM
RECENT BURNED AREAS, WITH THIS NEW RAINFALL ACTING AS A TRIGGER.
NUMEROUS LANDSLIDES HAVE ALREADY OCCURRED IN WHATCOM, SKAGIT, KING
COUNTIES AND OTHERS. MORE LANDSLIDES CONTINUE TO BE 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
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