Flood Watch Issued - Heavy Rain Expected...

posted Mar 30, 2011, 8:02 AM by smike@guemesfire.org
1159 AM PDT TUE MAR 29 2011.


..A STRONG PACIFIC STORM SYSTEM WILL BRING PERIODS OF HEAVY RAIN 
TO THE COAST AND MOUNTAINS OF WESTERN WASHINGTON WEDNESDAY 
THROUGH AT LEAST THURSDAY...

..FLOOD WATCH REMAINS IN EFFECT FROM WEDNESDAY AFTERNOON THROUGH
FRIDAY AFTERNOON...

THE FLOOD WATCH CONTINUES FOR 

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

* FROM WEDNESDAY AFTERNOON THROUGH FRIDAY AFTERNOON 

* A WARM FRONTAL SYSTEM WILL SPREAD RAIN INTO WESTERN WASHINGTON 
 LATER TONIGHT AND WEDNESDAY. THE FRONTAL BAND IS EXPECTED TO
 STALL OVER THE AREA FOR A 24 TO 48 HOUR PERIOD PRODUCING HEAVY
 PRECIPITATION ALONG THE COAST AND MOUNTAINS. FREEZING LEVELS
 WILL RISE DRAMATICALLY TO 7000-9000 FEET DURING THE PERIOD
 WHICH RAISES THE THREAT OF FLOODING ON SOME RIVERS.

* THE SKOKOMISH RIVER IN MASON COUNTY IS THE RIVER MOST LIKELY TO
 FLOOD...POSSIBLY BY LATE WEDNESDAY. HOWEVER...48 HOUR RAINFALL
 AMOUNTS OF UP TO 5 INCHES IN THE OLYMPICS AND 4 TO 7 INCHES IN
 THE CENTRAL CASCADES WILL DRIVE RIVERS SUCH AS SNOQUALMIE...
 SNOHOMISH...AND STILLAGUAMISH TO FLOOD. THERE IS A CHANCE THE
 SNOHOMISH RIVER WILL REACH MAJOR FLOOD.

* LESS AMOUNTS OF RAINFALL ARE EXPECTED ELSEWHERE BUT WILL CAUSE
 SHARP RISES ON OTHER RIVES AND MAY ALSO CAUSE SOME ADDITIONAL
 RIVERS RUNNING OFF THE CASCADES AND OLYMPICS TO FLOOD. GRAYS
 HARBOR AND KITSAP COUNTIES MAY ALSO BE IMPACTED AND COULD BE
 ADDED TO THE FLOOD WATCH LATER. SCATTERED LANDSLIDES IN AREAS
 THAT RECEIVE HEAVY RAIN MAY ALSO OCCUR.

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.
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