663
WWUS76 KSEW 170458
NPWSEW
URGENT - WEATHER MESSAGE
NATIONAL WEATHER SERVICE SEATTLE WA
958 PM PDT THU APR 16 2026
WAZ308-309-318>320-171600-
/O.CON.KSEW.FR.Y.0006.260417T0800Z-260417T1600Z/
FOOTHILLS AND VALLEYS OF PIERCE AND SOUTHERN KING COUNTIES-
FOOTHILLS AND VALLEYS OF THURSTON AND LEWIS COUNTIES-LOWLANDS OF
LEWIS AND SOUTHERN THURSTON COUNTIES-MIDDLE CHEHALIS RIVER VALLEY-
WILLAPA AND BLACK HILLS-
INCLUDING ELK PLAIN, ENUMCLAW, MOSSYROCK, GRAND MOUND, ROCHESTER,
CHEHALIS, MCCLEARY, MAPLE VALLEY, PE ELL, ELMA, PRAIRIE RIDGE,
LEA HILL, MONTESANO, SOUTH HILL, FORDS PRAIRIE, MORTON, AND
COVINGTON-SAWYER-W
958 PM PDT THU APR 16 2026
..FROST ADVISORY REMAINS IN EFFECT FROM 1 AM TO 9 AM PDT FRIDAY
* WHAT...TEMPERATURES AS LOW AS 31 WILL RESULT IN FROST FORMATION.
* WHERE...MIDDLE CHEHALIS RIVER VALLEY, FOOTHILLS AND VALLEYS OF
PIERCE AND SOUTHERN KING COUNTIES, FOOTHILLS AND VALLEYS OF
THURSTON AND LEWIS COUNTIES, LOWLANDS OF LEWIS AND SOUTHERN
THURSTON COUNTIES, AND WILLAPA AND BLACK HILLS.
* WHEN...FROM 1 AM TO 9 AM PDT FRIDAY.
* IMPACTS...FROST COULD HARM SENSITIVE OUTDOOR VEGETATION. SENSITIVE
OUTDOOR PLANTS MAY BE KILLED IF LEFT UNCOVERED.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
TAKE STEPS NOW TO PROTECT TENDER PLANTS FROM THE COLD.
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