SYNOPSIS...MOIST ONSHORE FLOW AND A COOL AND UNSTABLE AIRMASS OVER THE REGION WILL KEEP SHOWERS OVER WESTERN WASHINGTON INTO SUNDAY. A WEAK WARM FRONT WILL BRUSH THE AREA SUNDAY NIGHT FOLLOWED BY A TRAILING COLD FRONT MONDAY. A WEAKER FRONT AND A COOL UPPER LEVEL TROUGH WILL BRING RAIN THEN SHOWERS TUESDAY AND WEDNESDAY FOLLOWED BY DRIER WEATHER THURSDAY AND THURSDAY NIGHT. ANOTHER PACIFIC FRONTAL SYSTEM WILL MOVE INTO THE AREA FRIDAY AND SATURDAY.