A strong cold front will sweep across western WashingtonFriday night. In addition to creating gusty winds this front will usher in a colder air mass. Snow levels will be in the 2000 to 2500 foot range during the day Saturday. This means that the heavier showers or any thunderstorms that develop will likely contain a large amount of small hail, possibly completely covering the ground to a depth of an inch or two.
The snow level will lower into the 1500 to 2000 foot range Saturday night which will only increase the threat of hail with any showers. Also, if the showers are heavy enough, wet snow might be pulled briefly to near sea level.
Improving conditions are likely Sunday under weak high pressure aloft.
San Juan County-Western Whatcom County-Southwest Interior-Western Skagit County-Everett And Vicinity-Tacoma Area-Admiralty Inlet Area-Hood Canal Area-Lower Chehalis Valley Area-Eastern Strait Of Juan De Fuca-Western Strait Of Juan De Fuca-North Coast-Central Coast-East Puget Sound Lowlands-Bellevue And Vicinity-Seattle And Vicinity-Bremerton And Vicinity.
Information from the National Weather Service - April 10, 2015