* PORTIONS OF WESTERN WASHINGTON...INCLUDING THE FOLLOWING COUNTIES... GRAYS HARBOR...CLALLAM...JEFFERSON...SKAGIT... WHATCOM...KING...KITSAP...LEWIS...MASON...PIERCE...SNOHOMISH... THURSTON.
* FROM 4 PM PST THIS AFTERNOON THROUGH LATE WEDNESDAY NIGHT
* THE FIRST OF A SERIES OF FRONTS THAT WILL AFFECT THE REGION INTO WEDNESDAY IS PUSHING ONSHORE. SNOW LEVELS WILL START OUT AROUND 4000 FEET THEN RISE TO OVER 6000 FEET THIS AFTERNOON. THIS FRONT IS EXPECTED TO PRODUCE BETWEEN ONE AND TWO INCHES OF PRECIPITATION OVER THE MOUNTAINS.
A SECOND...STRONGER FRONT THAT HAS ENTRAINED TROPICAL MOISTURE WILL RAISE THE FREEZING LEVELS TO AROUND 10000 FEET AND SPREAD HEAVIER RAIN ACROSS THE AREA TONIGHT INTO WEDNESDAY. THE COMBINATION OF A STRONG WESTERLY WIND IN THE MID LEVELS OF THE ATMOSPHERE AND ABUNDANT MOISTURE IS EXPECTED TO PRODUCE VERY HEAVY RAIN ALONG THE WEST SLOPES OF THE OLYMPICS AND CASCADES. RAINFALL AMOUNTS OVER THE OLYMPICS AND CASCADES ARE EXPECTED TO RANGE FROM 3 TO 7 INCHES AND MAY LOCALLY EXCEED 10 INCHES.
A FLOOD WATCH MEANS THERE IS A POTENTIAL FOR FLOODING BASED ON THE CURRENT FORECASTS. RESIDENTS IN THE WATCH AREA SHOULD BE AWARE OF THE POTENTIAL FOR SIGNIFICANT RAINFALL THAT COULD LEAD TO FLOODING AND BE PREPARED TO TAKE ACTION SHOULD FLOODING DEVELOP.
MONITOR FORECASTS FROM THE NATIONAL WEATHER SERVICE IN SEATTLE FOR UPDATES ON THIS EVENT.
