Winter Storm Warning 10, NWS Seattle, WA

899 
WWUS46 KSEW 240531
WSWSEW

URGENT - WINTER WEATHER MESSAGE
NATIONAL WEATHER SERVICE SEATTLE WA
931 PM PST THU FEB 23 2012

WAZ518-241345-
/O.CON.KSEW.WS.W.0010.120224T1400Z-120226T0200Z/
WEST SLOPES NORTHERN CASCADES AND PASSES-
931 PM PST THU FEB 23 2012

...WINTER STORM WARNING REMAINS IN EFFECT FROM 6 AM FRIDAY TO
6 PM PST SATURDAY...

* SOME AFFECTED LOCATIONS...MOUNT BAKER.

* TIMING...SNOW WILL INCREASE AND BECOME HEAVY AT TIMES ON 
  FRIDAY AHEAD OF A STRONG COLD FRONT. EXPECT THE STEADY SNOW TO 
  TAPER OFF TO SHOWERS LATE FRIDAY NIGHT. EXPECT BRIEF BURSTS OF 
  HEAVY SNOW DURING THE DAY SATURDAY. 

* SNOW ACCUMULATIONS...1 TO 2.5 FEET IS LIKELY BY LATE IN THE 
  DAY SATURDAY. 

* MAIN IMPACT...ANTICIPATE DETERIORATING DRIVING CONDITIONS IN 
  THE NORTH CASCADES ABOVE THE 2000 FOOT LEVEL ON FRIDAY...WITH 
  TRAVEL BECOMING HAZARDOUS BY LATE IN THE DAY FRIDAY. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A WINTER STORM WARNING IS ISSUED WHEN A FOOT OF MORE OF SNOW IS
LIKELY WITHIN A 12 HOUR PERIOD.

&&

$$

WAZ513-241345-
/O.CON.KSEW.WW.Y.0019.120224T1400Z-120225T1200Z/
OLYMPICS-
931 PM PST THU FEB 23 2012

...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 6 AM FRIDAY TO
4 AM PST SATURDAY...

* SOME AFFECTED LOCATIONS...HURRICANE RIDGE.

* TIMING...SNOW WILL BECOME HEAVY AT TIMES ON THE SOUTHWEST 
  FACING SLOPES ON FRIDAY AHEAD OF A STRONG COLD FRONT. EXPECT 
  THE STEADY SNOW TO TAPER OFF TO SHOWERS LATE FRIDAY EVENING. 

* ACCUMULATIONS...6 TO 11 INCHES OF NEW SNOW IS LIKELY BY 
  SATURDAY MORNING. 

* SNOW LEVEL...WILL RISE TO 3500 FEET ON FRIDAY BUT FALL TO NEAR 
  1500 FEET BEHIND THE FRONT FRIDAY NIGHT. 

* MAIN IMPACT...THE ROAD TO HURRICANE RIDGE MIGHT BECOME CLOSED 
  DUE TO SNOW ON FRIDAY. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A WINTER WEATHER ADVISORY IS ISSUED FOR A VARIETY OF WINTER
WEATHER CONDITIONS SUCH AS FREEZING RAIN AND SNOW OCCURRING AT
THE SAME TIME. WHILE THE WEATHER WILL BE SIGNIFICANT...THE WORD
ADVISORY MEANS THAT LIFE THREATENING WINTER WEATHER IS NOT
EXPECTED.

&&

$$

WAZ519-241345-
/O.CON.KSEW.WS.A.0006.120224T2300Z-120226T0200Z/
WEST SLOPES CENTRAL CASCADES AND PASSES-
931 PM PST THU FEB 23 2012

...WINTER STORM WATCH REMAINS IN EFFECT FROM FRIDAY AFTERNOON
THROUGH SATURDAY AFTERNOON...

* SOME AFFECTED LOCATIONS...PARADISE...STEVENS PASS...AND 
  SNOQUALMIE PASS. 

* TIMING...SNOW...LOCALLY HEAVY...IS EXPECTED TO DEVELOP FRIDAY 
  AFTERNOON AND PERSIST THROUGH FRIDAY NIGHT. ALTHOUGH THE SNOW 
  WILL BECOME SHOWERY LATE FRIDAY NIGHT...ANTICIPATE BURSTS OF 
  HEAVY SNOW AT TIMES DURING THE DAY SATURDAY. 

* SNOW ACCUMULATIONS...1 TO 2 FEET IS ANTICIPATED BY LATE IN THE 
  DAY SATURDAY. 

* SNOW LEVEL...WILL RISE TO 4000 FEET ON FRIDAY BUT FALL TO NEAR 
  1500 FEET BEHIND THE FRONT FRIDAY NIGHT. 

* MAIN IMPACT...THOSE PLANNING TRAVEL IN THE WATCH AREA SHOULD 
  BE PREPARED FOR HAZARDOUS...WINTER DRIVING CONDITIONS. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A WINTER STORM WATCH MEANS CONDITIONS ARE FAVORABLE FOR SEVERE
WINTER WEATHER. IF YOU MUST TRAVEL IN THE WATCH AREA...CARRY AN
EXTRA FLASHLIGHT...FOOD...WATER...AND BLANKETS IN CASE OF
EMERGENCY.

&&

$$

742 
WWUS46 KSEW 241309
WSWSEW

URGENT - WINTER WEATHER MESSAGE
NATIONAL WEATHER SERVICE SEATTLE WA
509 AM PST FRI FEB 24 2012

WAZ519-250000-
/O.UPG.KSEW.WS.A.0006.120224T2300Z-120226T0200Z/
/O.EXB.KSEW.WS.W.0010.120224T2300Z-120226T0200Z/
WEST SLOPES CENTRAL CASCADES AND PASSES-
509 AM PST FRI FEB 24 2012

...WINTER STORM WARNING IN EFFECT FROM 3 PM THIS AFTERNOON TO
6 PM PST SATURDAY...

THE NATIONAL WEATHER SERVICE IN SEATTLE HAS ISSUED A WINTER STORM
WARNING FOR HEAVY SNOW...WHICH IS IN EFFECT FROM 3 PM THIS
AFTERNOON TO 6 PM PST SATURDAY. THE WINTER STORM WATCH IS NO
LONGER IN EFFECT.

* SOME AFFECTED LOCATIONS...PARADISE...STEVENS PASS...AND 
  SNOQUALMIE PASS. 

* TIMING...SNOW...LOCALLY HEAVY...IS EXPECTED TO DEVELOP FRIDAY
  AFTERNOON AND PERSIST THROUGH SATURDAY.

* SNOW ACCUMULATIONS...1 TO 2 FEET IS ANTICIPATED BY LATE IN THE 
  DAY SATURDAY. 

* SNOW LEVEL...WILL RISE TO 4000 FEET THIS AFTERNOON BUT FALL TO
  NEAR 1500 FEET BEHIND THE FRONT TONIGHT.

* MAIN IMPACT...THOSE PLANNING TRAVEL IN THE WATCH AREA SHOULD 
  BE PREPARED FOR HAZARDOUS...WINTER DRIVING CONDITIONS. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A WINTER STORM WARNING IS ISSUED WHEN A FOOT OF MORE OF SNOW IS
LIKELY WITHIN A 12 HOUR PERIOD.

&&

$$

WAZ518-250000-
/O.CON.KSEW.WS.W.0010.120224T1400Z-120226T0200Z/
WEST SLOPES NORTHERN CASCADES AND PASSES-
509 AM PST FRI FEB 24 2012

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 6 PM PST
SATURDAY...

* SOME AFFECTED LOCATIONS...MOUNT BAKER.

* TIMING...SNOW WILL INCREASE AND BECOME HEAVY AT TIMES LATER
  TODAY AHEAD OF A STRONG COLD FRONT. SNOW...HEAVY AT TIMES WILL
  CONTINUE THROUGH SATURDAY AFTERNOON. 

* SNOW ACCUMULATIONS...18 TO 30 INCHES BY LATE IN THE DAY SATURDAY.

* MAIN IMPACT...ANTICIPATE DETERIORATING DRIVING CONDITIONS IN 
  THE NORTH CASCADES ABOVE THE 2000 FOOT LEVEL ON FRIDAY...WITH 
  TRAVEL BECOMING HAZARDOUS BY LATE IN THE DAY FRIDAY. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A WINTER STORM WARNING IS ISSUED WHEN A FOOT OF MORE OF SNOW IS
LIKELY WITHIN A 12 HOUR PERIOD.

&&

$$

WAZ513-250000-
/O.CON.KSEW.WW.Y.0019.120224T1400Z-120225T1200Z/
OLYMPICS-
509 AM PST FRI FEB 24 2012

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 4 AM PST
SATURDAY...

* SOME AFFECTED LOCATIONS...HURRICANE RIDGE.

* TIMING...SNOW WILL BECOME HEAVY AT TIMES ON THE SOUTHWEST 
  FACING SLOPES ON FRIDAY AHEAD OF A STRONG COLD FRONT. EXPECT 
  THE STEADY SNOW TO TAPER OFF TO SHOWERS LATE FRIDAY EVENING. 

* ACCUMULATIONS...5 TO 11 INCHES OF NEW SNOW IS LIKELY BY
  SATURDAY MORNING.

* SNOW LEVEL...WILL RISE TO 3500 FEET TODAY BUT FALL TO NEAR 1500
  FEET BEHIND THE FRONT TONIGHT.

* MAIN IMPACT...THE ROAD TO HURRICANE RIDGE MIGHT BECOME CLOSED
  DUE TO SNOW TODAY INTO EARLY SATURDAY.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A WINTER WEATHER ADVISORY IS ISSUED FOR A VARIETY OF WINTER
WEATHER CONDITIONS SUCH AS FREEZING RAIN AND SNOW OCCURRING AT
THE SAME TIME. WHILE THE WEATHER WILL BE SIGNIFICANT...THE WORD
ADVISORY MEANS THAT LIFE THREATENING WINTER WEATHER IS NOT
EXPECTED.

&&

$$

546 
WWUS46 KSEW 242321
WSWSEW

URGENT - WINTER WEATHER MESSAGE
NATIONAL WEATHER SERVICE SEATTLE WA
321 PM PST FRI FEB 24 2012

WAZ518-251200-
/O.CON.KSEW.WS.W.0010.000000T0000Z-120226T0200Z/
WEST SLOPES NORTHERN CASCADES AND PASSES-
321 PM PST FRI FEB 24 2012

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 6 PM PST
SATURDAY FOR THE WEST SLOPES OF THE NORTHERN CASCADES...

* SOME AFFECTED LOCATIONS...MOUNT BAKER.

* TIMING...SNOW...HEAVY AT TIMES WILL CONTINUE THROUGH SATURDAY
  AFTERNOON.

* SNOW ACCUMULATIONS...18 TO 30 INCHES BY LATE IN THE DAY 
  SATURDAY.

* MAIN IMPACT...ANTICIPATE DETERIORATING DRIVING CONDITIONS IN THE
  NORTH CASCADES ABOVE THE 2000 FOOT LEVEL...WITH HAZARDOUS TRAVEL
  EXPECTED. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A WINTER STORM WARNING MEANS SEVERE WINTER WEATHER IS OCCURRING OR
IMMINENT.

&&

$$

WAZ519-251200-
/O.CON.KSEW.WS.W.0010.000000T0000Z-120226T0200Z/
WEST SLOPES CENTRAL CASCADES AND PASSES-
321 PM PST FRI FEB 24 2012

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 6 PM PST
SATURDAY FOR THE WEST SLOPES OF THE CENTRAL CASCADES...

* SOME AFFECTED LOCATIONS...PARADISE...STEVENS PASS...AND 
  SNOQUALMIE PASS. 

* TIMING...SNOW...LOCALLY HEAVY...WILL PERSIST THROUGH SATURDAY.

* SNOW ACCUMULATIONS...1 TO 2 FEET IS ANTICIPATED BY LATE IN THE 
  DAY SATURDAY. 

* SNOW LEVEL...AROUND 3000 FEET WILL FALL TO NEAR 1500 FEET
  BEHIND THE FRONT TONIGHT.

* MAIN IMPACT...THOSE PLANNING TRAVEL IN THE WATCH AREA SHOULD 
  BE PREPARED FOR HAZARDOUS...WINTER DRIVING CONDITIONS. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A WINTER STORM WARNING IS ISSUED WHEN A FOOT OF MORE OF SNOW IS
LIKELY WITHIN A 12 HOUR PERIOD.

&&

$$

WAZ513-251200-
/O.CON.KSEW.WW.Y.0019.000000T0000Z-120225T1200Z/
OLYMPICS-
321 PM PST FRI FEB 24 2012

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 4 AM PST
SATURDAY FOR THE OLYMPIC MOUNTAINS...

* SOME AFFECTED LOCATIONS...HURRICANE RIDGE.

* TIMING...SNOW WILL BE HEAVY AT TIMES ON THE SOUTHWEST FACING
  SLOPES. EXPECT THE STEADY SNOW TO TAPER OFF TO SHOWERS LATE
  FRIDAY EVENING.

* ACCUMULATIONS...5 TO 11 INCHES OF NEW SNOW IS LIKELY BY 
  SATURDAY MORNING. 

* SNOW LEVEL...AROUND 3000 FEET WILL FALL TO NEAR 1500 FEET
  BEHIND THE FRONT TONIGHT.

* MAIN IMPACT...THE ROAD TO HURRICANE RIDGE MIGHT BECOME CLOSED 
  DUE TO SNOW TODAY INTO EARLY SATURDAY. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A WINTER WEATHER ADVISORY IS ISSUED FOR A VARIETY OF WINTER
WEATHER CONDITIONS SUCH AS FREEZING RAIN AND SNOW OCCURRING AT
THE SAME TIME. WHILE THE WEATHER WILL BE SIGNIFICANT...THE WORD
ADVISORY MEANS THAT LIFE THREATENING WINTER WEATHER IS NOT
EXPECTED.

&&

$$

33

983 
WWUS46 KSEW 251215
WSWSEW

URGENT - WINTER WEATHER MESSAGE
NATIONAL WEATHER SERVICE SEATTLE WA
415 AM PST SAT FEB 25 2012

WAZ513-251315-
/O.EXP.KSEW.WW.Y.0019.000000T0000Z-120225T1200Z/
OLYMPICS-
415 AM PST SAT FEB 25 2012

...WINTER WEATHER ADVISORY HAS EXPIRED...

HEAVIER SNOW AMOUNTS HAVE TAPERED. UP TO 5 INCHES OF NEW SNOW IS
EXPECTED TODAY IN SNOW SHOWERS.

$$

WAZ518-260200-
/O.CON.KSEW.WS.W.0010.000000T0000Z-120226T0200Z/
WEST SLOPES NORTHERN CASCADES AND PASSES-
415 AM PST SAT FEB 25 2012

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 6 PM PST THIS
EVENING...

* SOME AFFECTED LOCATIONS...MOUNT BAKER.

* TIMING...SNOW...HEAVY AT TIMES WILL CONTINUE THROUGH LATE THIS AFTERNOON.

* SNOW ACCUMULATIONS...ANOTHER 8 TO 14 INCHES ADDITIONAL SNOW
  TODAY FOR A TOTAL STORM ACCUMULATION OF ONE TO THREE FEET.

* MAIN IMPACT...ANTICIPATE POOR WINTER WEATHER DRIVING CONDITIONS
  ABOVE ABOUT 1000 FEET...HAZARDOUS TRAVEL EXPECTED.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A WINTER STORM WARNING MEANS SEVERE WINTER WEATHER IS OCCURRING
OR IMMINENT.

&&

$$

WAZ519-260200-
/O.CON.KSEW.WS.W.0010.000000T0000Z-120226T0200Z/
WEST SLOPES CENTRAL CASCADES AND PASSES-
415 AM PST SAT FEB 25 2012

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 6 PM PST THIS
EVENING...

* SOME AFFECTED LOCATIONS...PARADISE...STEVENS PASS...AND 
  SNOQUALMIE PASS. 

* TIMING...SNOW...HEAVY AT TIMES...THROUGH LATE TODAY.

* SNOW ACCUMULATIONS...ANOTHER 8 TO 13 INCHES OF NEW SNOW TODAY FOR
  A STORM TOTAL OF 1 TO 2 FEET.

* SNOW LEVEL...AROUND 1000 FEET.

* MAIN IMPACT...ANTICIPATE POOR WINTER WEATHER DRIVING CONDITIONS
  ABOVE ABOUT 1000 FEET...HAZARDOUS TRAVEL EXPECTED.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A WINTER STORM WARNING IS ISSUED WHEN A FOOT OF MORE OF SNOW IS
LIKELY WITHIN A 12 HOUR PERIOD.

&&

$$

BUEHNER

WEATHER.GOV/SEATTLE

740 
WWUS46 KSEW 252157
WSWSEW

URGENT - WINTER WEATHER MESSAGE
NATIONAL WEATHER SERVICE SEATTLE WA
157 PM PST SAT FEB 25 2012

WAZ518-260600-
/O.NEW.KSEW.WW.Y.0020.120226T0200Z-120226T1400Z/
/O.CON.KSEW.WS.W.0010.000000T0000Z-120226T0200Z/
WEST SLOPES NORTHERN CASCADES AND PASSES-
157 PM PST SAT FEB 25 2012

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 6 PM PST THIS
EVENING...
...WINTER WEATHER ADVISORY IN EFFECT FROM 6 PM THIS EVENING TO
6 AM PST SUNDAY...

THE NATIONAL WEATHER SERVICE IN SEATTLE HAS ISSUED A WINTER
WEATHER ADVISORY FOR THE NORTH CASCADES...WHICH IS IN EFFECT FROM
6 PM THIS EVENING TO 6 AM PST SUNDAY.

* SOME AFFECTED LOCATIONS...MOUNT BAKER.

* TIMING...HEAVY SNOW AT TIMES THROUGH EARLY THIS EVENING...WITH
  SNOW SHOWERS CONTINUING OVERNIGHT.

* ACCUMULATIONS...3 TO 6 INCHES WILL FALL THE REST OF TODAY. AN
  ADDITIONAL 4 TO 8 INCHES WILL FALL OVERNIGHT.

* MAIN IMPACT...ANTICIPATE HAZARDOUS WINTER WEATHER DRIVING
  CONDITIONS ABOVE ABOUT 1000 FEET.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A WINTER STORM WARNING MEANS SEVERE WINTER WEATHER IS OCCURRING
OR IMMINENT.

A WINTER WEATHER ADVISORY IS ISSUED FOR A VARIETY OF WINTER
WEATHER CONDITIONS. WHILE THE WEATHER WILL BE SIGNIFICANT...THE
WORD ADVISORY MEANS THAT LIFE THREATENING WINTER WEATHER IS NOT
EXPECTED.

&&

$$

WAZ519-260600-
/O.NEW.KSEW.WW.Y.0020.120226T0200Z-120226T1400Z/
/O.CON.KSEW.WS.W.0010.000000T0000Z-120226T0200Z/
WEST SLOPES CENTRAL CASCADES AND PASSES-
157 PM PST SAT FEB 25 2012

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 6 PM PST THIS
EVENING...
...WINTER WEATHER ADVISORY IN EFFECT FROM 6 PM THIS EVENING TO
6 AM PST SUNDAY...

THE NATIONAL WEATHER SERVICE IN SEATTLE HAS ISSUED A WINTER
WEATHER ADVISORY FOR THE CENTRAL CASCADES...WHICH IS IN EFFECT
FROM 6 PM THIS EVENING TO 6 AM PST SUNDAY.

* SOME AFFECTED LOCATIONS...PARADISE...STEVENS PASS...AND 
  SNOQUALMIE PASS. 

* TIMING...HEAVY SNOW AT TIMES THROUGH THIS EARLY EVENING...WITH
  SNOW SHOWERS CONTINUING OVERNIGHT.

* ACCUMULATIONS...3 TO 6 INCHES WILL FALL THE REST OF TODAY. AN
  ADDITIONAL 4 TO 8 INCHES WILL FALL OVERNIGHT.

* MAIN IMPACT...ANTICIPATE HAZARDOUS WINTER WEATHER DRIVING
  CONDITIONS ABOVE ABOUT 1000 FEET.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A WINTER STORM WARNING MEANS SEVERE WINTER WEATHER IS OCCURRING
OR IMMINENT.

A WINTER WEATHER ADVISORY IS ISSUED FOR A VARIETY OF WINTER
WEATHER CONDITIONS. WHILE THE WEATHER WILL BE SIGNIFICANT...THE
WORD ADVISORY MEANS THAT LIFE THREATENING WINTER WEATHER IS NOT
EXPECTED.

&&

$$

WEATHER.GOV/SEATTLE
MERCER

AREA FORECAST DISCUSSION...UPDATED
NATIONAL WEATHER SERVICE SEATTLE WA
344 PM PST THU FEB 23 2012

UPDATED THE SHORT TERM SECTION.

.SYNOPSIS...A WARM FRONT WILL BRUSH THE FAR WESTERN PART OF THE
STATE FRIDAY MORNING. THIS WILL BE FOLLOWED BY A STRONG COLD FRONT
LATE IN THE DAY FRIDAY. THIS FRONT WILL NOT ONLY BRING GUSTY WINDS
AND LOCALLY HEAVY PRECIPITATION BUT IT WILL ALSO USHER IN A COLDER
AIR MASS. THE SNOW LEVELS WILL PLUMMET TO NEAR 1000 FEET ON
SATURDAY. A CHILLY AND UNSTABLE AIR MASS WILL REMAIN OVER THE AREA
THROUGH SUNDAY FOR A THREAT OF RAIN OR SNOW SHOWERS.

&&

.SHORT TERM...
THE LANGLEY HILL RADAR /KLGX/ SHOWED THE LEADING EDGE OF THE RAIN
SHIELD ASSOCIATED WITH A WMFNT ABOUT 50 MILES OFFSHORE. THERE WERE
SOME LIGHT SHOWERS POPPING OVER THE CWA THIS AFTERNOON WELL AHEAD OF
THE WMFNT. WENT ON AHEAD AND SPED UP THE TIMING OF THE PRECIP OVER
THE CWA...HOWEVER THE NW PORTION WILL HAVE THE HIGHEST THREAT OF
MEASURABLE PRECIP.

THE WMFNT WILL BRUSH THE FAR WRN PART OF THE CWA TOMORROW MORNING
AND THERE WILL PROBABLY BE A BREAK IN THE PRECIP ACROSS MUCH OF THE
INTERIOR BEFORE THE COLD OR OCCLUDED FRONT ARRIVES LATER. THE PRECIP
RATES WILL DEFINITELY INCREASE ON THE SW FACING SLOPES OF THE
OLYMPICS AND N CASCADES DURING THE DAY FRI...THUS A WINTER WEATHER
ADVISORY WAS ISSUED FOR THE OLYMPICS AND A WINTER STORM WARNING FOR
THE N CASCADES. THE PRECIP WILL NOT PICK UP OVER THE CENTRAL
CASCADES UNTIL LATER FRI AFTERNOON...THUS A WINTER STORM WATCH WAS
ISSUED FOR THIS AREA. THE WIND IN THE LOWER TO MID LEVELS OF THE
ATMOSPHERE WILL HAVE A SOUTHERLY COMPONENT TO IT...THUS STEVENS AND
SNOQUALMIE PASSES WILL END UP SOMEWHAT PRECIP SHADOWED UNTIL LATE
FRI NIGHT WHEN THE FLOW BECOMES WLY. SNOWFALL AMOUNTS IN THE
CASCADES WILL BE ON THE ORDER OF 1-2 FT BY LATE IN THE DAY SATURDAY.

THE COLD...UPPER TROF WILL MOVE OVER THE REGION ON SATURDAY AND THE
SNOW LEVELS WILL FALL TO NEAR 1K FT. BOTH THE NAM AND GFS WERE
INDICATING BANDED SHOWERS OVER THE CWA ON SATURDAY...WITH ONE OF
THOSE BANDS MOST LIKELY THE PUGET SOUND CONVERGENCE ZONE /PSCZ/. THE
AIR MASS WILL BE UNSTABLE ENOUGH FOR A SLIGHT RISK OF ISOLATED
TSTMS...MOST LIKELY WITHIN THE ORGANIZED SHOWER BANDS. DUE TO THE
COLDER AIR MASS...ANTICIPATE THE HEAVY SHOWERS TO CONTAIN A LARGE
AMOUNT OF SMALL HAIL OR GRAUPEL ON SATURDAY. IN FACT...DO NOT BE
SURPRISED IF THE SHOWERS FALL AS SNOW AT TIMES OVER THE HIGHER
ELEVATIONS OF THE EAST PUGET SOUND LOWLANDS.

EXPECT THE UPPER LOW TO SETTLE OVER THE REGION ON SUNDAY FOR A
CONTINUED THREAT OF RAIN OR SNOW SHOWERS. THE PRECIP WILL MOST
LIKELY FALL AS SNOW ON THE HIGHER HILLS ON THE LOWLANDS SATURDAY
NIGHT AND SUNDAY. THESE WILL BE OF THE HIT OR MISS VARIETY. IT IS
POSSIBLE THAT A FEW SPOTS COULD RECEIVE AN INCH OR TWO...ESPECIALLY
IF THE SHOWERS ARE ORGANIZED.

IMPROVING CONDITIONS WILL OCCUR SUNDAY NIGHT AS THE UPPER LOW MOVES
INTO OREGON AND DRY...NORTHERLY FLOW ALOFT BECOMES ESTABLISHED OVER
THE CWA.

.LONG TERM...
IT APPEARS THAT MON WILL BE A DRY DAY UNDER RIDGING ALOFT.  BEYOND
MON...THE WEATHER PATTERN WILL BECOME ACTIVE AGAIN FOR UNSETTLED
WEATHER CONDITIONS. THE REGION WILL ALSO REMAIN IN A COOL PATTERN...
THUS THERE WILL BE THE POSSIBILITY OF LOWLAND SNOW WITH THESE
SYSTEMS. IN SHORT...EXPECT BELOW NORMAL TEMPS AND NEAR NORMAL PRECIP
DURING THIS PERIOD.

&&

.HYDROLOGY...
FLOODING CONTINUED ON THE GREEN RIVER AT AUBURN AND THE SNOQUALMIE
RIVER AT CARNATION BUT BOTH HAVE ALREADY CRESTED AND WERE RECEDING.
A FLOOD WATCH WAS ISSUED FOR THE WHITE RIVER IN KING AND PIERCE
COUNTIES DUE TO RELEASES FROM MUD MOUNTAIN DAM. THERE IS A
POSSIBILITY THAT THE RELEASES WILL REACH OR EXCEED THE FLOOD FLOW OF
8000 CFS DURING THE NEXT 24 HOURS.

THE NEXT SYSTEM WILL BRING ANOTHER ROUND OF HEAVY PRECIP ON THE SW
FACING SLOPES OF THE OLYMPICS AND CASCADES ON FRI. THE SNOW LEVELS
WILL BRIEFLY POP UP TO 3500-4K FT ON THE OLYMPICS AND UP TO 4500 FT
ON THE CENTRAL CASCADES FRI. ANOTHER 1-2 INCHES OF RAIN IS EXPECTED
IN THE 24-HOUR PERIOD ENDING AT 4 AM PST SATURDAY ON THE SW FACING
SLOPES. THIS SHOULD BE ENOUGH TO CAUSE SOME RISES ON SOME RIVERS...
WITH SHARP RISES EXPECTED ON THE SKOKOMISH. AT THIS TIME...NEW OR
ADDITIONAL RIVER FLOODING IS NOT EXPECTED.

ANTICIPATE THE SNOW LEVEL TO FALL TO NEAR 1K FT ON SATURDAY AND THIS
WILL END OF THE THREAT OF SIGNIFICANT RAINFALL ON THE RIVERS
FLOWING OUT OF THE MOUNTAINS. A COOL PATTERN WILL PERSIST THRU NEXT
THU...WHICH WILL MEAN THAT FLOODING WILL BE NOT BE EXPECTED SATURDAY
THRU THE END OF NEXT WEEK.

&&

.AVIATION...KATX RADAR IS SHOWERING WEAK ECHOES ACROSS WESTERN WA
THIS AFTERNOON...MAINLY AFFECTING THE CASCADES. CIGS DID POP UP TO
VFR RANGE AND THIS TREND WILL CONTINUE THIS EVENING.

A WARM FRONT WILL BRUSH THE AREA LATE TONIGHT WITH A COLD FRONT
MOVING INLAND ON FRI. EXPECT LOWERING CIGS WITH RAIN AFFECTING THE
COAST AFTER MIDNIGHT. LIGHT PRECIP IS POSSIBLE IN THE INTERIOR FRI
MORNING...BUT HEAVIER PRECIP WILL HOLD OFF UNTIL THE AFTERNOON. MAY
SEE MVFR CONDITIONS. GUSTY SOUTH WINDS WILL ACCOMPANY THIS
SYSTEM...ESPECIALLY ALONG THE COAST AND NORTH PART. 33

KSEA...VFR CONDITIONS THIS EVENING WITH LIGHT SLY WINDS. MAY SEE
LIGHT PRECIP FRI MORNING...BUT EXPECT HIGHER CHANCES IN THE
AFTERNOON AS A COLD FRONT MOVES INLAND. CIGS WILL LOVER TO MVFR WITH
GUSTY S WINDS. 33

&&

.MARINE...A VIGOROUS LOW PRES CENTER WILL SPIN OFF THE WA COAST ON
FRI WITH S/SE GALES FORECAST OVER THE WATERS...PARTICULARLY THE
COASTAL WATERS...EAST ENTRANCE...ADMIRALTY INLET AND NORTHERN INLAND
WATERS. A GALE WARNING IS IN EFFECT FOR THE ZONES MENTIONED AND
SHOULD SEE SOUTH WINDS INCREASING TO 25 TO 35 KT DURING THE EARLY
MORNING HOURS. THIS SYSTEM WILL MOVE INLAND FRI NIGHT INTO SAT BUT
MODELS SHOW STRONG NW FLOW BEHIND. SO EXPECT NW GALES AGAIN OVER THE
COASTAL WATERS AND PROBABLY THROUGH THE STRAIT OF JUAN DE FUCA
THROUGH SAT. SEAS WILL ALSO BUILD TO 20-25 FT. ONSHORE FLOW WILL
WEAKEN BY SUNDAY AFTERNOON. THE NEXT COLD FRONT WILL ARRIVE ON
TUESDAY. 33

&&

.SEW WATCHES/WARNINGS/ADVISORIES...
WA...FLOOD WARNINGS/WATCHES REMAIN IN EFFECT FOR PARTS OF THE CWA.

     WINTER STORM WARNING FROM 6 AM FRIDAY TO 6 PM PST SATURDAY
     FOR THE WEST SLOPES NORTHERN CASCADES ABOVE 2000 FEET.

     WINTER WEATHER ADVISORY FROM 6 AM FRIDAY TO 4 AM PST SATURDAY
     FOR THE OLYMPICS ABOVE 2500 FEET.

     WINTER STORM WATCH FROM FRIDAY AFTERNOON THROUGH SATURDAY
     AFTERNOON FOR THE WEST SLOPES CENTRAL CASCADES ABOVE 3000 FEET.

PZ...GALE WARNINGS ARE IN EFFECT FOR ALL WATERS EXCEPT THE
     CENTRAL STRAIT OF JUAN DE FUCA AND THE PUGET SOUND/HOOD
     CANAL.

     SMALL CRAFT ADVISORY FROM 4 AM TO 6 PM PST FRIDAY FOR THE
     PUGET SOUND AND HOOD CANAL.

     SMALL CRAFT ADVISORY FOR ROUGH BAR IN EFFECT UNTIL 4 PM PST
     FRIDAY FOR THE GRAYS HARBOR BAR.

&&

WWW.WEATHER.GOV/SEATTLE

FOR THE GRAPHICAL AFD...VISIT
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