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Flood Watch

FLOOD WATCH
NATIONAL WEATHER SERVICE SEATTLE WA
1209 PM PST MON NOV 24 2014

WAC033-041-053-057-061-073-250815-
/O.NEW.KSEW.FA.A.0013.141125T1200Z-141127T1200Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
KING-LEWIS-PIERCE-SKAGIT-SNOHOMISH-WHATCOM-
1209 PM PST MON NOV 24 2014

...FLOOD WATCH IN EFFECT FROM LATE TONIGHT THROUGH LATE WEDNESDAY
NIGHT...

THE NATIONAL WEATHER SERVICE IN SEATTLE HAS ISSUED A

* FLOOD WATCH FOR PORTIONS OF WESTERN WASHINGTON...INCLUDING THE
  FOLLOWING COUNTIES...SKAGIT...WHATCOM...KING...LEWIS...PIERCE...
   SNOHOMISH....

* FROM LATE TONIGHT THROUGH LATE WEDNESDAY NIGHT

* STARTING THIS EVENING...RAIN...HEAVY AT TIMES...WILL BE
  IMPACTING THE WASHINGTON CASCADES MOST OF THIS WEEK. THIS WILL
  BE COMBINED WITH RELATIVELY HIGH SNOW LEVELS AND SO RESULT IN A
  FLOOD THREAT. THE HEAVIEST RAIN WILL COME IN TWO PERIODS. THE
  FIRST IS THIS EVENING THROUGH THE DAY ON WEDNESDAY. 48 HOUR
  RAINFALL AMOUNTS ARE EXPECTED TO BE 0.5 TO 1.25 INCHES IN THE
  LOWLANDS...1 TO 2 INCHES ALONG THE COAST...AND 2 TO 6 INCHES IN
  THE CASCADES. LOCALLY THERE COULD BE AS MUCH AS 10 INCHES IN THE
  MOUNTAINS. THE LOCATION OF THE HEAVIEST RAIN WILL CHANGE IT`S
  FOCUS FROM THE NORTH TO CENTRAL TO SOUTH CASCADES AND AND BACK
  TO THE NORTH OVER THIS PERIOD...MAKING FOR A TRICKY RAINFALL
  FORECAST AND RIVER FORECASTS.

* THIS RAINFALL WILL LIKELY DRIVE A HAND FULL OF RIVERS ABOVE FLOOD
  STAGE. THE RIVERS THAT LOOK TO HAVE THE BEST POTENTIAL FOR
  FLOODING AT THIS TIME INCLUDE THE SNOQUALMIE...TOLT...
  STILLAGUAMISH...MIDDLE PUYALLUP... AND THE NOOKSACK. OTHER
  RIVERS TO WATCH ARE THE SKAGIT...SNOHOMISH...AND THE WHITE
  RIVERS. MOST RIVERS WILL BE RUNNING VERY HIGH SO CONTINUE TO
  MONITOR THE SITUATION FOR CHANGES IN THE LIST OF POTENTIAL RIVER
  FLOODING.

* THE SECOND PERIOD OF HEAVY RAIN WILL BE FROM OVERNIGHT WEDNESDAY
  NIGHT THROUGH THE DAY ON FRIDAY. DURING THIS TIME THE HEAVIEST
  RAINFALL WILL FOCUS ON THE OLYMPICS AND THE NORTHERN HALF OF THE
  WASHINGTON CASCADES. THIS MAY CAUSE FLOODING ON ADDITIONAL
  RIVERS IN THOSE AREAS.

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
JBB





Hydrologic Outlook

HYDROLOGIC OUTLOOK
WAC033-041-053-057-061-073-250030-

HYDROLOGIC OUTLOOK
NATIONAL WEATHER SERVICE SEATTLE WA
351 AM PST MON NOV 24 2014

...HEAVY RAIN IN THE CASCADES TONIGHT THROUGH TUESDAY NIGHT OR
WEDNESDAY COULD CAUSE SOME RIVERS TO FLOOD...

THREE TO SIX INCHES OF RAIN IS LIKELY ALONG THE WEST SLOPES OF
THE CASCADES LATE TODAY THROUGH MIDDAY WEDNESDAY...AS A STRONG
WARM FRONT MOVES INTO WESTERN WASHINGTON. THE SNOW LEVEL WILL
RISE TO AROUND 6500 FEET TONIGHT AND REMAIN BETWEEN 6500 AND
7500 FEET THROUGH WEDNESDAY.

THE RAINFALL AMOUNTS THAT ARE EXPECTED MEAN THAT FLOODING IS
POSSIBLE ON THE MOST FLOOD-PRONE RIVERS THAT FLOW OFF THE WEST
SLOPES OF THE CASCADES. THAT INCLUDES BUT IS NOT LIMITED TO THE
COWLITZ RIVER...THE REACH OF THE PUYALLUP RIVER NEAR ORTING...AND
THE SNOQUALMIE...TOLT...SKYKOMISH...SNOHOMISH...STILLAGUAMISH...AND
NOOKSACK RIVERS.

FLOODING COULD BEGIN BY LATE TUESDAY AND THE THREAT WILL PROBABLY
CONTINUE THROUGH WEDNESDAY OR WEDNESDAY NIGHT. IF FLOODING DOES
OCCUR...IT WILL PROBABLY BE MINOR. HOWEVER...THE FLOODING COULD
BECOME WORSE IF HEAVY RAIN REMAINS FIXED OVER A PARTICULAR PART OF
THE CASCADES FOR MOST OF THIS EPISODE.

PEOPLE NEAR FLOOD-PRONE REACHES OF RIVERS FLOWING OFF THE WEST
SLOPES OF THE CASCADES SHOULD PREPARE FOR POSSIBLE FLOODING DURING
THE NEXT FEW DAYS. STAY TUNED FOR THE MOST CURRENT INFORMATION
FROM THE NATIONAL WEATHER SERVICE.

$$








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