From the National Weather Service:
Winter Weather Advisory from SAT 4:00 AM PST until SUN 4:00 PM PST
Execute a pre-planned activity identified in the instructions
Portions of northwest and west central Washington
WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 4 PM PST SUNDAY
WHAT...Snow expected. Total snow accumulations of 2 to 7 inches.
WHERE…Portions of northwest and west central Washington.
WHEN…Until 4 PM PST Sunday.
IMPACTS…Plan on difficult travel conditions.
ADDITIONAL DETAILS…Snow will most likely develop in showers and bands, leading to highly variable snow accumulations. The best timing for heavier snow is Saturday night into Sunday.
PRECAUTIONARY/PREPAREDNESS ACTIONS… Slow down and use caution while traveling. For the latest road conditions in Washington state, call 5 1 1.