High Wind Warning 8, NWS Seattle, WA

000 
WWUS76 KSEW 200015
NPWSEW

URGENT - WEATHER MESSAGE
NATIONAL WEATHER SERVICE SEATTLE WA
415 PM PST FRI DEC 19 2008

WAZ515-518-519-200115-
/O.CAN.KSEW.HW.A.0005.081220T1500Z-081222T0000Z/
WESTERN STRAIT OF JUAN DE FUCA-
WEST SLOPES NORTHERN CASCADES AND PASSES-
WEST SLOPES CENTRAL CASCADES AND PASSES-
415 PM PST FRI DEC 19 2008

...HIGH WIND WATCH IS CANCELLED...

THE NATIONAL WEATHER SERVICE IN SEATTLE HAS CANCELLED THE HIGH
WIND WATCH. 

THESE AREAS ARE NOW UNDER A BLIZZARD WARNING. 

$$

WAZ505-201300-
/O.CON.KSEW.HW.W.0008.081220T1700Z-081222T0000Z/
EAST PUGET SOUND LOWLANDS-
415 PM PST FRI DEC 19 2008

...HIGH WIND WARNING REMAINS IN EFFECT FROM 9 AM SATURDAY TO 4 PM
PST SUNDAY...

A HIGH WIND WARNING REMAINS IN EFFECT FROM 9 AM SATURDAY TO 4 PM
PST SUNDAY. 

STRONG WINDS WILL DEVELOP OVER THE EAST PUGET SOUND LOWLANDS ON
SATURDAY MORNING AND INTENSIFY ON SATURDAY AFTERNOON. THIS WIND
EVENT WILL PEAK ON SATURDAY NIGHT AND THEN SUBSIDE ON SUNDAY.

AT THE HEIGHT OF THIS EVENT...SUSTAINED WINDS COULD REACH 50 TO
70 MPH WITH PEAK GUSTS OF 70 TO 90 MPH. THE STRONGEST WINDS ARE
EXPECTED TO IMPACT COMMUNITIES IN EASTERN KING COUNTY SUCH AS
NORTH BEND...MAPLE VALLEY AND ENUMCLAW. COMMUNITES IN EASTERN
SNOHOMISH COUNTY SUCH AS SULTAN AND GOLD BAR COULD ALSO EXPERIENCE
WINDS APPROACHING THIS MAGNITUDE.

FURTHER WEST ALONG THE I-405 AND HIGHWAY 167 CORRIDORS...INCLUDING
WOODINVILLE...BELLEVUE...RENTON AND AUBURN...WINDS OF 25 TO 35
MPH WITH GUSTS OF 50 TO 55 MPH ARE EXPECTED. 

THIS EVENT COULD RIVAL A SIMILAR FOOTHILLS WIND STORM FROM EARLY
DECEMBER 2003. DURING THAT EVENT...NUMEROUS TREES WERE BLOWN
OVER...BLOCKING RESIDENTIAL STREETS AND MAJOR HIGHWAYS
ALIKE...INCLUDING HIGHWAY 18 NEAR TIGER MOUNTAIN. POWER WAS
KNOCKED OUT TO MANY RESIDENCES AND BUSINESSES FOR AS MUCH AS A
WEEK. PEOPLE NEED TO PREPARE NOW FOR MAJOR DISRUPTION RESULTING
FROM THIS WINDSTORM. BE SURE TO HAVE ENOUGH SUPPLIES ON HAND TO
LAST FOR SEVERAL DAYS SHOULD YOU BE STRANDED AT HOME. BY LATE
SATURDAY MORNING...IT MAY BE TOO LATE TO PREPARE.

IN ADDITION...WIND CHILL READINGS DURING THIS EVENT MAY BE NEAR
ZERO WITH AIR TEMPERATURES IN THE MID TO UPPER 20S. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A HIGH WIND WARNING MEANS THAT A SEVERE HIGH WIND EVENT IS
IMMINENT OR OCCURRING. SUSTAINED WINDS OF AT LEAST 50 MPH...OR
GUSTS OF 75 MPH OR HIGHER WILL OCCUR ACROSS THE LOWLANDS.
RESIDENTS AND LOCAL OFFICIALS IN THE WARNED AREA SHOULD BE
PREPARED FOR WIDESPREAD DAMAGE AND POWER OUTAGES THAT COULD LAST
FOR MORE THAN A WEEK.

&&

$$

HANER

WEATHER.GOV/SEATTLE

000 
WWUS76 KSEW 200608
NPWSEW

URGENT - WEATHER MESSAGE
NATIONAL WEATHER SERVICE SEATTLE WA
1008 PM PST FRI DEC 19 2008

WAZ505-201415-
/O.CON.KSEW.HW.W.0008.081220T1700Z-081222T0000Z/
EAST PUGET SOUND LOWLANDS-
1008 PM PST FRI DEC 19 2008

...HIGH WIND WARNING REMAINS IN EFFECT FOR THE EAST PUGET SOUND
LOWLANDS FROM 9 AM SATURDAY TO 4 PM PST SUNDAY...

A HIGH WIND WARNING REMAINS IN EFFECT FROM 9 AM SATURDAY TO 4 PM
PST SUNDAY. STRONG WINDS WILL DEVELOP OVER THE EAST PUGET SOUND
LOWLANDS ON SATURDAY MORNING AND INTENSIFY ON SATURDAY AFTERNOON.
THIS WIND EVENT WILL PEAK ON SATURDAY NIGHT AND THEN SUBSIDE ON
SUNDAY.

AT THE HEIGHT OF THIS EVENT...SUSTAINED WINDS COULD REACH 50 TO
70 MPH WITH PEAK GUSTS OF 70 TO 90 MPH. THE STRONGEST WINDS ARE
EXPECTED TO IMPACT COMMUNITIES IN EASTERN KING COUNTY SUCH AS
NORTH BEND...MAPLE VALLEY AND ENUMCLAW. COMMUNITES IN EASTERN
SNOHOMISH COUNTY SUCH AS SULTAN AND GOLD BAR COULD ALSO
EXPERIENCE WINDS APPROACHING THIS MAGNITUDE.

FURTHER WEST ALONG THE I-405 AND HIGHWAY 167 CORRIDORS...
INCLUDING WOODINVILLE...BELLEVUE...RENTON AND AUBURN...WINDS OF
25 TO 35 MPH WITH GUSTS OF 50 TO 55 MPH ARE EXPECTED.

THIS EVENT COULD RIVAL A SIMILAR FOOTHILLS WIND STORM FROM EARLY
DECEMBER 2003. DURING THAT EVENT...NUMEROUS TREES WERE BLOWN
OVER...BLOCKING RESIDENTIAL STREETS AND MAJOR HIGHWAYS ALIKE...
INCLUDING HIGHWAY 18 NEAR TIGER MOUNTAIN. POWER WAS KNOCKED OUT
TO MANY RESIDENCES AND BUSINESSES FOR AS MUCH AS A WEEK. PEOPLE
NEED TO PREPARE NOW FOR MAJOR DISRUPTION RESULTING FROM THIS
WINDSTORM. BE SURE TO HAVE ENOUGH SUPPLIES ON HAND TO LAST FOR
SEVERAL DAYS SHOULD YOU BE STRANDED AT HOME. BY LATE SATURDAY
MORNING...IT MAY BE TOO LATE TO PREPARE.

IN ADDITION...WIND CHILL READINGS DURING THIS EVENT MAY BE NEAR
ZERO WITH AIR TEMPERATURES IN THE MID TO UPPER 20S.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A HIGH WIND WARNING MEANS THAT A SEVERE HIGH WIND EVENT IS
IMMINENT OR OCCURRING. SUSTAINED WINDS OF AT LEAST 50 MPH...OR
GUSTS OF 75 MPH OR HIGHER WILL OCCUR ACROSS THE LOWLANDS.
RESIDENTS AND LOCAL OFFICIALS IN THE WARNED AREA SHOULD BE
PREPARED FOR WIDESPREAD DAMAGE AND POWER OUTAGES THAT COULD LAST
FOR MORE THAN A WEEK.

&&

$$

000 
WWUS76 KSEW 201301
NPWSEW

URGENT - WEATHER MESSAGE
NATIONAL WEATHER SERVICE SEATTLE WA
501 AM PST SAT DEC 20 2008

WAZ505-210100-
/O.EXT.KSEW.HW.W.0008.081220T1700Z-081221T2100Z/
EAST PUGET SOUND LOWLANDS-
501 AM PST SAT DEC 20 2008

...HIGH WIND WARNING NOW IN EFFECT FROM 9 AM THIS MORNING TO 1 PM
PST SUNDAY...

THE HIGH WIND WARNING IS NOW IN EFFECT FROM 9 AM THIS MORNING TO
1 PM PST SUNDAY. STRONG WINDS WILL DEVELOP OVER THE EAST PUGET
SOUND LOWLANDS THIS MORNING AND INTENSIFY THIS AFTERNOON. THIS
WIND EVENT WILL PEAK ON TONIGHT INTO SUNDAY MORNING BETWEEN 7 PM
TONIGHT AND 7 AM SUNDAY MORNING. AT THE HEIGHT OF THIS
EVENT...SUSTAINED WINDS COULD REACH 50 TO 70 MPH WITH PEAK GUSTS
OF 70 TO 90 MPH. THE STRONGEST WINDS ARE EXPECTED TO IMPACT
COMMUNITIES IN EASTERN KING COUNTY SUCH AS NORTH BEND...MAPLE
VALLEY AND ENUMCLAW. COMMUNITIES IN EASTERN SNOHOMISH COUNTY SUCH
AS SULTAN AND GOLD BAR COULD ALSO EXPERIENCE WINDS APPROACHING
THIS MAGNITUDE.

FURTHER WEST ALONG THE I-405 AND HIGHWAY 167 CORRIDORS...
INCLUDING WOODINVILLE...BELLEVUE...RENTON AND AUBURN...WINDS OF
25 TO 35 MPH WITH GUSTS OF 50 TO 55 MPH ARE EXPECTED.

THIS EVENT COULD RIVAL A SIMILAR FOOTHILLS WIND STORM FROM EARLY
DECEMBER 2003. DURING THAT EVENT...NUMEROUS TREES WERE BLOWN
OVER...BLOCKING RESIDENTIAL STREETS AND MAJOR HIGHWAYS ALIKE...
INCLUDING HIGHWAY 18 NEAR TIGER MOUNTAIN. POWER WAS KNOCKED OUT
TO MANY RESIDENCES AND BUSINESSES FOR AS MUCH AS A WEEK.
PREPARATIONS FOR THIS WINDSTORM SHOULD BE COMPLETED BY THIS
MORNING. BE SURE TO HAVE ENOUGH SUPPLIES ON HAND TO LAST FOR
SEVERAL DAYS SHOULD YOU BE STRANDED AT HOME. 

IN ADDITION...WIND CHILL READINGS DURING THIS EVENT MAY BE NEAR
ZERO WITH AIR TEMPERATURES IN THE MID TO UPPER 20S.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A HIGH WIND WARNING MEANS THAT A SEVERE HIGH WIND EVENT IS
IMMINENT OR OCCURRING. SUSTAINED WINDS OF AT LEAST 50 MPH...OR
GUSTS OF 75 MPH OR HIGHER WILL OCCUR ACROSS THE LOWLANDS.
RESIDENTS AND LOCAL OFFICIALS IN THE WARNED AREA SHOULD BE
PREPARED FOR WIDESPREAD DAMAGE AND POWER OUTAGES THAT COULD LAST
FOR MORE THAN A WEEK.

&&

$$

FELTON
WEATHER.GOV/SEATTLE

000 
WWUS76 KSEW 201924
NPWSEW

URGENT - WEATHER MESSAGE
NATIONAL WEATHER SERVICE SEATTLE WA
1124 AM PST SAT DEC 20 2008

WAZ505-210100-
/O.CON.KSEW.HW.W.0008.000000T0000Z-081221T2100Z/
EAST PUGET SOUND LOWLANDS-
1124 AM PST SAT DEC 20 2008

...HIGH WIND WARNING REMAINS IN EFFECT UNTIL 1 PM PST SUNDAY...

A HIGH WIND WARNING REMAINS IN EFFECT UNTIL 1 PM PST SUNDAY. 

STRONG WINDS WILL DEVELOP OVER THE EAST PUGET SOUND LOWLANDS THIS
AFTERNOON. THIS WIND EVENT WILL PEAK ON TONIGHT INTO SUNDAY
MORNING BETWEEN 7 PM TONIGHT AND 7 AM SUNDAY MORNING. AT THE
HEIGHT OF THIS EVENT...SUSTAINED WINDS COULD REACH 40 TO 60 MPH
WITH GUSTS AROUND 75 MPH. THE STRONGEST WINDS ARE EXPECTED TO IMPACT
COMMUNITIES IN EASTERN KING COUNTY SUCH AS NORTH BEND...MAPLE
VALLEY AND ENUMCLAW. COMMUNITIES IN EASTERN SNOHOMISH COUNTY SUCH
AS SULTAN AND GOLD BAR COULD ALSO EXPERIENCE WINDS APPROACHING
THIS MAGNITUDE.

FURTHER WEST ALONG THE I-405 AND HIGHWAY 167 CORRIDORS...
INCLUDING WOODINVILLE...BELLEVUE...RENTON AND AUBURN...WINDS OF
25 TO 35 MPH WITH GUSTS AROUND 55 MPH ARE EXPECTED.

THIS EVENT COULD RIVAL A SIMILAR FOOTHILLS WIND STORM FROM EARLY
DECEMBER 2003. DURING THAT EVENT...NUMEROUS TREES WERE BLOWN
OVER...BLOCKING RESIDENTIAL STREETS AND MAJOR HIGHWAYS ALIKE...
INCLUDING HIGHWAY 18 NEAR TIGER MOUNTAIN. POWER WAS KNOCKED OUT
TO MANY RESIDENCES AND BUSINESSES FOR AS MUCH AS A WEEK.
PREPARATIONS FOR THIS WINDSTORM SHOULD BE RUSHED TO COMPLETION. BE
SURE TO HAVE ENOUGH SUPPLIES ON HAND TO LAST FOR SEVERAL DAYS
SHOULD YOU BE STRANDED AT HOME.

IN ADDITION...WIND CHILL READINGS DURING THIS EVENT MAY BE NEAR
ZERO WITH AIR TEMPERATURES IN THE MID TO UPPER 20S. THESE STRONG
WINDS WILL ALSO CREATE BLOWING SNOW THAT WILL CAUSE REDUCED
VISIBILITY AT TIMES AND HAZARDOUS DRIVING CONDITIONS.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A HIGH WIND WARNING MEANS THAT A SEVERE HIGH WIND EVENT IS
IMMINENT OR OCCURRING. SUSTAINED WINDS OF AT LEAST 50 MPH...OR
GUSTS OF 75 MPH OR HIGHER WILL OCCUR ACROSS THE LOWLANDS.
RESIDENTS AND LOCAL OFFICIALS IN THE WARNED AREA SHOULD BE
PREPARED FOR WIDESPREAD DAMAGE AND POWER OUTAGES THAT COULD LAST
FOR MORE THAN A WEEK.

&&

$$

000 
WWUS76 KSEW 210050
NPWSEW

URGENT - WEATHER MESSAGE
NATIONAL WEATHER SERVICE SEATTLE WA
450 PM PST SAT DEC 20 2008

WAZ505-211300-
/O.CON.KSEW.HW.W.0008.000000T0000Z-081221T2100Z/
EAST PUGET SOUND LOWLANDS-
450 PM PST SAT DEC 20 2008

...HIGH WIND WARNING REMAINS IN EFFECT UNTIL 1 PM PST SUNDAY...

A HIGH WIND WARNING REMAINS IN EFFECT UNTIL 1 PM PST SUNDAY. 

STRONG WINDS WILL DEVELOP OVER THE EAST PUGET SOUND LOWLANDS THIS
EVENING AND PERSIST THROUGH SUNDAY MORNING. SUSTAINED WINDS COULD REACH
40 TO 60 MPH WITH GUSTS AROUND 75 MPH. THE STRONGEST WINDS ARE
EXPECTED TO IMPACT COMMUNITIES IN EASTERN KING COUNTY SUCH AS
NORTH BEND...MAPLE VALLEY AND ENUMCLAW. COMMUNITIES IN EASTERN
SNOHOMISH COUNTY SUCH AS SULTAN AND GOLD BAR COULD ALSO EXPERIENCE
WINDS APPROACHING THIS MAGNITUDE.

FURTHER WEST ALONG THE I-405 AND HIGHWAY 167 CORRIDORS...
INCLUDING WOODINVILLE...BELLEVUE...RENTON AND AUBURN...WINDS OF
25 TO 35 MPH WITH GUSTS AROUND 45 MPH ARE EXPECTED.

THIS EVENT COULD RIVAL A SIMILAR FOOTHILLS WIND STORM FROM EARLY
DECEMBER 2003. DURING THAT EVENT...NUMEROUS TREES WERE BLOWN
OVER...BLOCKING RESIDENTIAL STREETS AND MAJOR HIGHWAYS ALIKE...
INCLUDING HIGHWAY 18 NEAR TIGER MOUNTAIN. POWER WAS KNOCKED OUT
TO MANY RESIDENCES AND BUSINESSES FOR AS MUCH AS A WEEK.
PREPARATIONS FOR THIS WINDSTORM SHOULD BE RUSHED TO COMPLETION.
BE SURE TO HAVE ENOUGH SUPPLIES ON HAND TO LAST FOR SEVERAL DAYS
SHOULD YOU BE STRANDED AT HOME.

IN ADDITION...WIND CHILL READINGS DURING THIS EVENT MAY BE NEAR
ZERO WITH AIR TEMPERATURES IN THE 20S. THESE STRONG WINDS WILL
ALSO CREATE BLOWING AND DRIFTING SNOW THAT WILL CAUSE REDUCED
VISIBILITY AT TIMES AND HAZARDOUS DRIVING CONDITIONS.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A HIGH WIND WARNING MEANS THAT A SEVERE HIGH WIND EVENT IS
IMMINENT OR OCCURRING. SUSTAINED WINDS OF AT LEAST 50 MPH...OR
GUSTS OF 75 MPH OR HIGHER WILL OCCUR ACROSS THE LOWLANDS.
RESIDENTS AND LOCAL OFFICIALS IN THE WARNED AREA SHOULD BE
PREPARED FOR WIDESPREAD DAMAGE AND POWER OUTAGES THAT COULD LAST
FOR MORE THAN A WEEK.

&&

$$

000 
WWUS76 KSEW 210459
NPWSEW

URGENT - WEATHER MESSAGE
NATIONAL WEATHER SERVICE SEATTLE WA
859 PM PST SAT DEC 20 2008

WAZ505-210600-
/O.CAN.KSEW.HW.W.0008.000000T0000Z-081221T2100Z/
EAST PUGET SOUND LOWLANDS-
859 PM PST SAT DEC 20 2008

...HIGH WIND WARNING FOR THE EAST PUGET SOUND LOWLANDS IS
CANCELLED...

THE NATIONAL WEATHER SERVICE IN SEATTLE HAS CANCELLED THE HIGH
WIND WARNING. A WINTER STORM WARNING IS NOW IN EFFECT FOR THE
EAST PUGET SOUND LOWLANDS. PLEASE REFER TO THE WINTER WEATHER
MESSAGE...WWUS46...FOR MORE DETAILS.

&&

$$

WEATHER.GOV

AREA FORECAST DISCUSSION ...UPDATED TO ADD AVIATION MARINE SECTIONS
NATIONAL WEATHER SERVICE SEATTLE WA
920 AM PST FRI DEC 19 2008

.SYNOPSIS...HIGH PRESSURE AND A COLD AIR MASS WILL PRODUCE
SUB-FREEZING TEMPERATURES TODAY AND FRIDAY. A STRONG FRONTAL SYSTEM
WILL AFFECT THE AREA SATURDAY AND SUNDAY...BRINGING STRONG WINDS AND
SIGNIFICANT SNOW TO VARIOUS PARTS OF WESTERN WASHINGTON. A COLD
UPPER LEVEL LOW TRAILING THE FRONTAL SYSTEM WILL MAINTAIN THE COLD
AIR MASS AND SNOW SHOWERS ON MONDAY. ANOTHER STRONG AND COLD WEATHER
SYSTEM WILL AFFECT THE REGION TUESDAY AFTERNOON THROUGH THURSDAY.

&&

.SHORT TERM...MUCH TO CONSIDER THIS MORNING WITH NEW COMPUTER
MODELS JUST NOW ARRIVING. MODELS ARE ALL IN GOOD AGREEMENT THAT A
MAJOR WINTER STORM WILL AFFECT MUCH OF THE WESTERN WASHINGTON
LOWLANDS OVER THE WEEKEND WITH A HIGH WIND EVENT FOR THE CASCADE
FOOTHILLS AND EAST PUGET SOUND LOWLANDS EAST OF SEATTLE.

FIRST OFF...THE 12Z GFS/NAM AND ECMWF ARE A LITTLE WEAKER WITH THE
MOUNTAIN WAVE EVENT STARTING SATURDAY MORNING AND CONTINUING THROUGH
SUNDAY AFTERNOON. MODELS SHOW A LOT OF DEEP SLY FLOW ALL THE WAY
EAST TO THE FOOTHILLS THROUGH MOST THE PERIOD WITH LIGHT TO MODERATE
850 MB ELY FLOW FROM THE CREST EWD. THIS IS GENERALLY NOT FAVORABLE
FOR A STRONG DOWNSLOPE WIND EVENT W OF THE CREST. HOWEVER...WITH ALL
THE VERY COLD AIR DAMMED UP ON THE EAST SIDE...THERE WILL BE AN
ACCELERATION THROUGH THE GAPS AND POSSIBLY SPILL OVER DOWNSLOPING
BUT MAYBE NOT QUITE AS STRONG AS PREVIOUSLY THOUGHT. THE 12Z MM5GFS
IS THE FLY IN THE OINTMENT WHICH STILL INSISTS ON 60 KT DOWNSLOPE
WINDS...MUCH STRONGER THAN ALL THE OTHER MODELS.  THE WATCH STILL
LOOKS GOOD BUT WHEN UPGRADED TO A WARNING LATER TODAY...WILL
CONSIDER WORDING THE STRONGEST WINDS AT GAP LOCATIONS SUCH AS NORTH
BEND...CUMBERLAND...GOLD BAR...SNOQUALMIE FOR EXAMPLE.

THE SECOND MAJOR PROBLEM CONCERNS SNOW AMOUNTS AND PERHAPS SOME
ISSUES WITH MIXED PRECIP TYPES. THE NAM-12 IS THE COLDEST OF THE
MODELS. VIRTUALLY ALL SNOW EVERYWHERE. THIS MODEL SUGGESTS 6 INCHES
TO A FOOT OF SNOW IS POSSIBLE FROM NEAR OLYMPIA SOUTH AND WEST AND
LOCALLY TO 18 INCHES ALONG HOOD CANAL AND THE KITSAP PENINSULA.
HOWEVER...THE WARMER GFS/ECMWF SUGGEST SOME CHANGE OVER TO FREEZING
RAIN/SLEET HALF WAY THROUGH THE EVENT WHICH WOULD CUT THOSE AMOUNTS
IN HALF BUT WOULD END UP WITH POSSIBLE SIGNIFICANT ICING ON TOP OF
THE SNOW. PRECIP WOULD LIKELY STAY M0STY SNOW IN THE KITSAP/HOOD
CANAL AREA DUE TO POOLING OF COLD AIR AND THE COAST WOULD MOST
LIKELY CHANGE OVER TO ALL RAIN AT SOME POINT BY SUNDAY MORNING.

FOR THE I-5 CORRIDOR NORTH OF OLYMPIA THROUGH
SEATTLE...EVERETT...AND INCLUDING BELLINGHAM...A SIGNIFICANT SNOW
EVENT IS POSSIBLE. GIVEN THE AMOUNT OF OVERRUNNING MOISTURE AND HIGH
QPF TO SNOW RATIOS...I FELT IT PRUDENT TO ADD THE EVERETT/BELLINGHAM
ZONES TO THE WATCH. THE EAST PUGET SOUND LOWLANDS ARE STILL NOT
INCLUDED BECAUSE OF EAST WIND DRYING EFFECTS IN THE LOW LEVELS. IF
EAST WINDS ARE LIGHTER THERE COULD BE SOME SNOW ACCUMULATION
THERE...HOWEVER CONFIDENCE IS LOW AND AMOUNTS WOULD LIKELY BE MUCH
LIGHTER THAN AREAS WEST OF LAKE WASHINGTON. THE NEW NAM-12/GFS ARE
SHOWING RATHER IMPRESSIVE QPF AMOUNTS FOR THE METRO AREAS WITH THE
QPF TO SNOW RATIOS INCREASING AS YOU GO NORTH. AMOUNTS OVER 4 INCHES
ARE LIKELY AND POSSIBLY IN EXCESS OF 6 INCHES SO THE WATCH LOOKS
GOOD. THERE COULD ALSO BE SOME BLOWING AROUND OF SNOW WITH SOME
EASTERLY WIND SURFACING AT TIMES. REALLY MESSY. THERE IS SOME
POSSIBILITY OF A CHANGE OVER THE FREEZING RAIN AS FAR NORTH AS
SEATTLE LATE IN THE EVENT BUT MOST PRECIP WOULD HAVE ALREADY FALLEN
AS SNOW. PRECIP SHOULD LIGHTEN UP SUNDAY AFTERNOON.

THIS IS A RARE AND VERY COMPLEX WEATHER SITUATION. WE HAVE VERY COLD
AIR TRAPPED AT THE SURFACE...VERY MOIST OVERRUNNING AND SOME WARMING
ALOFT LEADING TO POSSIBLE ICING FOR SPOTS. WE WILL BE POURING OVER
THE LATEST MODELS DATA TODAY WITH SOME WARNINGS LIKELY TO BE ISSUED
FOR BOTH HIGH WIND AND SNOW LATER THIS AFTERNOON WITH MUCH MORE
DETAIL REGARDING SNOW AND ICE AMOUNTS...AND WIND.

MERCER

.LONG TERM...NO CHANGES.  THE UPPER LEVEL LOW REMAINS OVER THE AREA
ON MONDAY. SHOULD JUST BE A SNOW SHOWER DAY. NO IDEA ON AMOUNTS
THOUGH. MAIN EFFORT WAS DEALING WITH THE WEEKEND EVENT. ONE KEY
FACTOR IS THAT THE COLDER NE FLOW CONTINUES...SO THERE WONT BE MUCH
OF A WARM UP. GFS SHOWS THE NEXT FRONTAL SYSTEM BOMBING OFFSHORE AS
IT APPROACHES THE COAST. ECMWF IS MUCH WEAKER. BOTH MODELS MAINTAIN
THE COLD E-NE LOW LEVEL FLOW. GFS SOLUTION WOULD MEAN ANOTHER WIND
EVENT. SNOW IS MORE QUESTIONABLE. KAM

&&

.AVIATION...SOME STEAM FOG RISING OFF LAKE WASHINGTON IS PUSHING
WEST INTO THE SEATTLE AND BOEING FIELD TERMINALS THIS MORNING. A
PLUME OF MOISTURE OFF THE SOUND IS ALSO PUSHING INTO OLYMPIA THESE
WILL DECREASE FROM NORTH TO SOUTH 20-23Z. EXPECT CLEAR SKIES TO
DOMINATE TONIGHT. MID AND HIGH CLOUDS ASSOCIATED WITH THE NEXT
STRONG WEATHER SYSTEM WILL MOVE INTO THE AREA DURING THE AFTERNOON
HOURS SAT WITH SNOW SPREADING FROM SW TO NE AROUND 00Z SUN.

.SEA...LIGHT NE WIND TODAY. E WIND PICKING UP GENERALLY AFTER THE
18Z TIME FRAME BUT NOT SIGNIFICANTLY INCREASING UNTIL AROUND THE END
OF THE 30 HOUR PERIOD 00Z SUN. ALBRECHT

&&

.MARINE...IN THE SHORT TIME STILL HAVE SOME SMALL CRAFT ADVISORY
CONDITIONS AROUND THE WEST ENTRANCE TO THE STRAIT AND THE NORTHERN
INLAND WATERS. EXPECT GALE CONDITIONS TO DEVELOP SAT AFTERNOON AND
SAT NIGHT AND SPREAD RAPIDLY E COVERING ALL BUT THE PUGET SOUND
ZONE. WILL LIKELY ISSUE GALE WARNINGS FOR ALL WATERS EXCEPT PUGET
SOUND WITH THE AFTERNOON PACKAGE. ANOTHER SYSTEM WILL MOVE THROUGH
THE WATERS LATE TUE INTO WED. ALBRECHT

&&

SEW WATCHES/WARNINGS/ADVISORIES...
WA...HIGH WIND WATCH IN EFFECT FOR THE EAST PUGET SOUND
LOWLANDS...WEST STRAIT...AND THE CASCADES SATURDAY THROUGH SUNDAY
AFTERNOON.
.WINTER STORM WATCH FOR ALL OF WESTERN WASHINGTON...EXCLUDING THE
EAST PUGET SOUND LOWLANDS AND THE CASCADES LATE SATURDAY AFTERNOON
THROUGH LATE SUNDAY NIGHT.

PZ...SMALL CRAFT ADVISORY WEST ENTRANCE TO THE STRAIT AND NORTH
INLAND
      WATERS.
    .GALE WATCH COASTAL WATERS MIDDAY SAT THROUGH MIDDAY SUN.
    .SMALL CRAFT ADVISORY GRAYS HARBOR FOR ROUGH BAR CONDITIONS.

WEATHER.GOV/SEATTLE

FOR THE ENHANCED AFD PLEASE VISIT

WWW.WEATHER.GOV/SEATTLE/GAFD/LATESTWEBAFD.HTML (ALL LOWERCASE)

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SEATTLE WA
847 AM PST FRI DEC 19 2008

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0600 PM     SNOW             2 S MILL CREEK          47.83N 122.21W
12/18/2008  M3.5 INCH        SNOHOMISH          WA   NWS EMPLOYEE

            STORM TOTAL

&&

BBOWER