Flood Watch (December 19, 2014)

FLOOD WATCH NATIONAL WEATHER SERVICE SEATTLE WA 1139 AM PST FRI DEC 19 2014

WAC009-027-031-033-041-045-053-057-061-067-073-200830- /O.NEW.KSEW.FA.A.0015.141220T0000Z-141222T1200Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ CLALLAM-GRAYS HARBOR-JEFFERSON-KING-LEWIS-MASON-PIERCE-SKAGIT- SNOHOMISH-THURSTON-WHATCOM- 1139 AM PST FRI DEC 19 2014

...FLOOD WATCH IN EFFECT FROM 4 PM PST THIS AFTERNOON THROUGH LATE SUNDAY NIGHT...

THE NATIONAL WEATHER SERVICE IN SEATTLE HAS ISSUED A

FOLLOWING COUNTIES... GRAYS HARBOR...CLALLAM...JEFFERSON... SKAGIT...WHATCOM...KING...LEWIS...MASON...PIERCE...SNOHOMISH...  THURSTON.
 * FLOOD WATCH FOR PORTIONS OF WESTERN WASHINGTON...INCLUDING THE


 * FROM 4 PM PST THIS AFTERNOON THROUGH LATE SUNDAY NIGHT

SUNDAY...ESPECIALLY IN THE MOUNTAINS. STRONG WESTERLY FLOW ALOFT WILL BRING HEAVY RAIN AT TIMES TO THE COAST AND OLYMPICS ON SATURDAY. HEAVY RAIN WILL SPREAD INTO THE CASCADES SATURDAY AFTERNOON. MODELS CURRENTLY TAPER RAIN OVER THE OLYMPICS ON SUNDAY BUT KEEP HEAVY RAIN GOING IN THE CASCADES THROUGH SUNDAY NIGHT...ESPECIALLY OVER THE CASCADES FROM ABOUT KING COUNTY SOUTH. THE TOTAL MODEL RAINFALL OVER ABOUT 48 HOURS FROM SATURDAY MORNING THROUGH SUNDAY NIGHT AMOUNTS TO AROUND THREE TO SIX INCHES OVER THE OLYMPICS AND CENTRAL CASCADES WITH A NINE- INCH BULLS-EYE OVER MOUNT RAINIER. RAINFALL OVER THE LOWLANDS WILL GENERALLY BE AN INCH OR LESS AS THE WESTERLY FLOW CAUSES A RAINSHADOW EAST OF THE OLYMPICS.
 * HEAVY RAIN IS FORECAST OVER WESTERN WASHINGTON SATURDAY AND

TIME THE RIVERS MOST LIKELY TO FLOOD ARE THE ONES FLOWING OFF THE CASCADES OF KING...PIERCE...AND LEWIS COUNTIES...AS WELL AS THE UNUSUALLY FLOOD-PRONE SKOKOMISH RIVER IN MASON COUNTY. ANY FLOODING WOULD LIKELY BEGIN SATURDAY NIGHT ON THE OLYMPICS AND SUNDAY FOR THE CASCADES...WITH CRESTS SUNDAY NIGHT OR MONDAY. THE EXACT POSITION OF THE STREAM OF MOISTURE IS UNCERTAIN SO THIS OUTLOOK COVERS THE ENTIRE OLYMPIC PENINSULA AND ALL OF THE CASCADES RIVERS.
 * THESE RAINFALL AMOUNTS ARE ENOUGH TO CAUSE FLOODING. AT THIS

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A FLOOD WATCH MEANS CONDITIONS ARE FAVORABLE FOR FLOODING BUT FLOODING IS NOT IMMINENT OR OCCURRING. MONITOR THE LATEST FORECASTS FROM THE NATIONAL WEATHER SERVICE AND BE READY TO ACT QUICKLY IF FLOODING IS OBSERVED OR A WARNING IS ISSUED.

&&

$$

JBB