River Flood Warning 74, NWS Seattle, WA

AREA FORECAST DISCUSSION...DELAYED
NATIONAL WEATHER SERVICE SEATTLE WA
937 AM PST MON DEC 3 2007

PRODUCT IS DELAYED DUE TO INCLEMENT WEATHER. ESTIMATED TIME OF
ISSUANCE 1015 AM PST.

.SYNOPSIS...A VERY STRONG COLD FRONT WILL MOVE ACROSS WESTERN
WASHINGTON TODAY. STRONG WINDS IN MANY AREAS AND HEAVY RAIN WILL
DECREASE AFTER THE COLD FRONT MOVES INLAND THIS EVENING. THE
ASSOCIATED UPPER LEVEL TROUGH WILL KEEP THE RAIN GOING AS IT
APPROACHES THE AREA TONIGHT. SHOWERS WILL DEVELOP LATE TUESDAY
BEHIND THE TROUGH. WEAKER WEST TO NORTHWEST FLOW ALOFT WILL DEVELOP
WEDNESDAY THROUGH NEXT WEEKEND ALLOWING MORE NORMAL WEATHER WITH
WEAK WEATHER SYSTEMS BRUSHING THE AREA.

&&

.SHORT TERM...TIME FOR JUST THE HIGHLIGHTS. A FRONTAL WAVE HAS BEEN
PROCEEDING NORTH ALONG THE COAST AND HAS REACHED CAPE FLATTERY.
HIGHEST WINDS AT KHQM WERE 81 MPH AT 1 AM BEFORE THE OB WAS LOST.
925 MB WINDS FORECAST UP TO 90 KT SO UPDATED THE WIND WARNING TO
INCREASE POSSIBLE GUSTS ALONG THE COAST UP TO 100 MPH. COASTAL WINDS
EXPECTED TO BACK OFF A NOTCH BY 15Z. NAM12 SHOWS A WEAKER SURGE THIS
AFTERNOON SO THE WINDS MAY GO DOWN FOR A WHILE THROUGH LATE MORNING
THEN POP-UP BRIEFLY AND NOT AS STRONG AROUND MIDDAY.

INLAND WINDS...THE MESO LOW OVER THE NE OLYMPICS HAS BEEN SLOW TO
FORM. WINDS HAVE INCREASED BUT HAVENT EVEN REACHED ADVISORY
CRITERIA YET. THE HIGH WIND WARNING FOR THE EVERETT-ADMIRALTY INLET
AREA DOESNT LOOK GOOD AT THIS POINT...AND NEITHER DOES THE WIND
ADVISORY FOR PUGET SOUND SOUTHWARD. NAM12 SHOWS A PEAK IN THE
GRADIENT AROUND THE MESO LOW ABOUT 15Z SO PARTS OF THE AREA MAY
STILL REACH ADVISORY LEVELS. WITH THE WARNINGS/ADVISORIES ALREADY UP
IT WOULD BE FOOLISH TO DROP THEM BEFORE THE PEAK...SO WILL LET
THINGS RIDE. DAY SHIFT WILL PROBABLY HAVE TO DROP THEM LATER THIS
MORNING.

ACARS DATA SHOWS WINDS ALOFT SCREAMING...85 KT AT 850 MB. NOT MUCH
WIND DATA FOR THE MOUNTAINS BUT WITH WINDS ALOFT THAT STRONG...HIGH
WINDS ARE STILL A GOOD BET.

SNOW IN THE PASSES...ACARS DATA ALSO SHOWS THE FREEZING LEVEL UP TO
8000 FEET...SO HEAVY RAIN IS FALLING OVER MOST OF THE CASCADES.
HOWEVER THE PASSES STILL HAVE EAST WINDS...NEAR OR SUB-FREEZING
TEMPERATURES...AND CONTINUING HEAVY PRECIP. ROAD REPORTS SHOW
SNOQUALMIE HAS SWITCHED TO RAIN...BUT IT IS STILL SNOWING HARD AT
STEVENS. WILL EXTEND THE WINTER STORM WARNING UNTIL 4 PM THIS
AFTERNOON JUST TO BE SAFE. STEVENS MAY SWITCH TO RAIN BEFORE
THEN...BUT THEN AGAIN MAYBE NOT. STRONG WINDS ALSO CONTRIBUTE TO THE
WINTER STORM CRITERIA.

MODELS SHOW THE MAIN FRONT PASSING THE COAST AROUND 00Z. POPS REMAIN
HIGH TONIGHT THOUGH. THE HIGHEST QPF SHOULD CONTINUE OVER THE NORTH
INTERIOR UNTIL THE UPPER LEVEL TROUGH AND MAIN SURFACE LOW MOVE EAST
OF THE AREA MIDDAY TUESDAY. MUCH CALMER WEST FLOW WITH JUST SHOWERS
AROUND THE AREA TUESDAY NIGHT/WEDNESDAY. KAM

.LONG TERM...GFS SHOWS AN UPPER LEVEL RIDGE BUILDING W OF B.C.
WEDNESDAY...AND SHOWS IT STRONG ENOUGH BY THURSDAY FOR DRY NW FLOW
TO DEVELOP OVER W WA. MAY BE BE POSSIBLE TO DROP THE SHOWERS AND GO
WITH A DRY FORECAST AT LEAST FRIDAY AND SATURDAY. WILL LEAVE THAT
FOR THE DAY SHIFT. KAM

&&

.HYDRO...HUGE PRECIPITATION AMOUNTS EXPECTED IN THE MOUNTAINS
THROUGH TUESDAY MORNING. ACARS SOUNDINGS SHOW THE FREEZING LEVEL
OVER KSEA HAS GONE UP RAPIDLY IN THE LAST COUPLE OF HOURS TO NEAR
9000 FEET. SOUTHWEST WINDS IN THE 850-700MB LAYER RANGE FROM 80-100
KNOTS. THESE WINDS ARE NOT FORECAST TO DIMINISH UNTIL AFTER 21Z.
HEAVIEST PRECIPITATION IN THE NEXT 12 HOURS BUT MOIST WARM
SOUTHWESTERLY FLOW ALOFT CONTINUING THROUGH TUESDAY KEEPING THE
PRECIPITATION GOING ESPECIALLY IN THE MOUNTAINS. WYNOOCHEE DAM HAS
RECEIVED 2.50 INCHES OF RAIN BETWEEN 06Z-10Z. UPDATED QPF FOR OVER 6
INCHES OF RAIN IN THE OLYMPICS FOR THE 30 HOURS AND ANYWHERE FROM 4
TO 6 INCHES IN THE CASCADES. WITH THIS AMOUNT OF PRECIPITATION ALL
MAJOR STEM RIVERS IN WESTERN WASHINGTON HAVE THE POTENTIAL TO FLOOD
WITH MAJOR FLOODING POSSIBLE ON RIVERS FLOWING OFF THE OLYMPICS.
HEAVY PRECIPITATION IN THE LOWLANDS THROUGH THIS AFTERNOON AS WELL.
WILL ADD AN URBAN AND SMALL STREAM FLOOD WARNING TO THE MIX AS WELL
THIS MORNING. FELTON

&&

.AVALANCHE...EXISTING UNSTABLE SNOWPACK STRUCTURE AND INCREASING
LOADS DUE TO STRONG WINDS...VERY HEAVY SNOW THEN RAIN...AND WARMING
TREND FULLY EXPECTED TO CAUSE THE AVALANCHE CYCLE TO CONTINUE TODAY.
BACK COUNTRY TRAVEL IN AVALANCHE TERRAIN NOT RECOMMENDED TODAY.
PLEASE SEE WWW.NWAC.US FOR DETAILS. FERBER

&&

.AVIATION...ACARS SOUNDING INDICATE STRONG SLY WINDS OF 100+ KNOTS
AT 10K FT...50 KT AT 5K FT...AND 40 KT AT 3K FT.  THIS WILL LIKELY
CONTINUE THROUGH 21Z...BEFORE EASING.

A MIX OF MVFR AND IFR CONDITIONS WILL PREVAIL TODAY MON WITH MORE OR
LESS CONTINUOUS RAIN...HEAVY AT TIMES.

AT KSEA...WINDS WILL LIKELY NOT INCREASE AT THE SURFACE AS MUCH AS
WAS PREVIOUSLY EXPECTED. EXPECT S/SE WIND 10 TO 15 KT. STRONG WINDS
ALOFT POSSIBLY CREATING COMPRESSION ISSUES.

MERCER

&&

.MARINE...COASTAL AND BUOY OBSERVATIONS ARE INDICATING GUSTS TO 75
KT THIS MORNING. A HURRICANE FORCE WIND WARNING IS NOW IN EFFECT FOR
THE COASTAL WATERS TODAY.  STRONGEST WINDS WILL EASE SOMEWHAT LATER
IN THE MORNING BUT REMAIN QUITE STRONG. GALE WARNINGS WILL BE IN
EFFECT FOR ALL OTHER WATERS...ALTHOUGH IT IS SOMEWHAT UNCERTAIN THAT
THIS WILL MATERIALIZE. IN ADDITION...COMBINED SEAS WILL BUILD CLOSE
TO 40 FT WITH SEVERE BAR CONDITIONS...HIGH SURF...AND POSSIBLE
COASTAL FLOODING.

MERCER

&&

.SEW WATCHES/WARNINGS/ADVISORIES...
.HIGH WIND WARNING THROUGH 4 PM FOR THE CENTRAL AND NORTH
 COAST...EASTERN AND WESTERN STRAIT AREA...ADMIRALTY INLET AREA...
 HOOD CANAL AREA...EVERETT AND VICINITY...LOWER CHEHALIS VALLEY AREA.
.HIGH WIND WATCH THROUGH 4 PM CASCADES AND OLYMPICS.
.WIND ADVISORY ALL OTHER LOWLAND ZONES.
.FLOOD WATCH MOST OF WESTERN WASHINGTON.
.WINTER STORM WARNING FOR THE CASCADE PASSES.
.COASTAL FLOOD WATCH TODAY FOR THE NORTH COAST.
.COASTAL FLOOD WARNING FOR THE CENTRAL COAST.
.HIGH SURF WARNING TODAY FOR THE COAST.
.HURRICANE FORCE WIND WARNING COASTAL WATERS TODAY.
.STORM WARNING WEST ENTRANCE STRAIT OF JUAN DE FUCA.
.GALE WARNING ALL REMAINING WATERS TODAY.
.SMALL CRAFT ADVISORY ROUGH GRAYS HARBOR BAR.

WEATHER.GOV/SEATTLE

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SEATTLE WA
548 AM PST MON DEC 03 2007

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

0415 AM     NON-TSTM WND GST 1 NE FORKS              47.96N 124.38W
12/03/2007  M58 MPH          CLALLAM            WA   TRAINED SPOTTER

            58 MPH WIND GUST AT FORKS

0500 AM     NON-TSTM WND GST 7 WNW CLALLAM BAY       48.29N 124.41W
12/03/2007  E90 MPH          CLALLAM            WA   TRAINED SPOTTER

            ESTIMATED SUSTAINED SOUTH WIND 60 MPH WITH GUSTS TO 90
            MPH. SPOTTER HAS ANEMOMETER BUT TOO DANGEROUS TO WALK TO
            BUILDING WHERE EQUIPMENT IS.

0500 AM     HEAVY RAIN       8 NNW SKOKOMISH         47.44N 123.21W
12/03/2007  E4.50 INCH       MASON              WA   TRAINED SPOTTER

            4.5 PLUS INCHES OF RAIN IN 9 HOURS ENDING 5 AM. RAIN
            GAUGE WAS OVERFLOWING THUS REPORT IS ESTIMATED. TRUE
            AMOUNT IS HIGHER.

0528 AM     NON-TSTM WND GST 1 N ABERDEEN            46.98N 123.83W
12/03/2007  M62 MPH          GRAYS HARBOR       WA   TRAINED SPOTTER

            WIND GUST 62 MPH.

&&

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE SEATTLE WA
913 AM PST MON DEC 3 2007

WAZ001-503>519-031915-
SAN JUAN COUNTY-WESTERN WHATCOM COUNTY-SOUTHWEST INTERIOR-
EAST PUGET SOUND LOWLANDS-WESTERN SKAGIT COUNTY-EVERETT AND VICINITY-
SEATTLE/BREMERTON AREA-TACOMA AREA-ADMIRALTY INLET AREA-
HOOD CANAL AREA-LOWER CHEHALIS VALLEY AREA-OLYMPICS-
EASTERN STRAIT OF JUAN DE FUCA-WESTERN STRAIT OF JUAN DE FUCA-
NORTH COAST-CENTRAL COAST-WEST SLOPES NORTHERN CASCADES AND PASSES-
WEST SLOPES CENTRAL CASCADES AND PASSES-
913 AM PST MON DEC 3 2007

...HEAVY RAINFALL WILL GIVE A RISK FOR LANDSLIDES TO WESTERN
WASHINGTON THROUGH TONIGHT...

HEAVY RAINS OF 3 TO 6 INCHES OVER THE PAST 24 HOURS HAVE SATURATED
SOILS AROUND WESTERN WASHINGTON. HEAVY RAINFALL RATES OF 0.25 TO
TO 0.50 INCHES PER HOUR WILL CONTINUE THROUGH THE MID AFTERNOON
HOURS. THIS WILL PUT EXTRA PRESSURE ON SOIL STABILITY.

INDICES DEVELOPED BY THE U.S.G.S. SHOW THAT LANDSLIDES ARE POSSIBLE
DURING INTENSE RAINFALL OR WHEN RAINFALL AMOUNTS EXCEED ONE INCH IN
24 HOURS. OBSERVED RAINFALLS HAVE ALREADY EXCEEDED THAT AMOUNT
TODAY...INCLUDING THE SEATTLE AREA.

WHILE THE U.S.G.S. RAINFALL THRESHOLDS APPLY TO THE SEATTLE AREA OF
PUGET SOUND...MOST OF THE LOWLANDS OF WESTERN WASHINGTON ARE
SUSCEPTIBLE TO LANDSLIDES DUE TO WET SOILS. AREAS MOST SUSCEPTIBLE
TO LANDSLIDES UNDER THESE CONDITIONS ARE STEEP COASTAL BLUFFS AND
OTHER STEEP HILLSIDES. FOR MORE INFORMATION ABOUT CURRENT
CONDITIONS...SEE THE FOLLOWING INTERNET WEB PAGES:

HTTP://WWW.WRH.NOAA.GOV/SEW  (FOR WEATHER FORECASTS ALL LOWER CASE)
HTTP://LANDSLIDES.USGS.GOV/MONITORING/SEATTLE/RTD/PLOT.PHP (ALL
LOWER CASE)

COLMAN/ALBRECHT
WEATHER.GOV/SEATTLE

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE SEATTLE WA
915 AM PST MON DEC 3 2007

WAZ001-503>519-040600-
SAN JUAN COUNTY-WESTERN WHATCOM COUNTY-SOUTHWEST INTERIOR-
EAST PUGET SOUND LOWLANDS-WESTERN SKAGIT COUNTY-EVERETT AND VICINITY-
SEATTLE/BREMERTON AREA-TACOMA AREA-ADMIRALTY INLET AREA-
HOOD CANAL AREA-LOWER CHEHALIS VALLEY AREA-OLYMPICS-
EASTERN STRAIT OF JUAN DE FUCA-WESTERN STRAIT OF JUAN DE FUCA-
NORTH COAST-CENTRAL COAST-WEST SLOPES NORTHERN CASCADES AND PASSES-
WEST SLOPES CENTRAL CASCADES AND PASSES-
915 AM PST MON DEC 3 2007

...HEAVY RAINFALL WILL GIVE A RISK FOR LANDSLIDES TO WESTERN
WASHINGTON THROUGH TONIGHT...

HEAVY RAINS OF 3 TO 6 INCHES OVER THE PAST 24 HOURS HAVE SATURATED
SOILS AROUND WESTERN WASHINGTON. HEAVY RAINFALL RATES OF 0.25 TO
TO 0.50 INCHES PER HOUR WILL CONTINUE THROUGH THE MID AFTERNOON
HOURS. THIS WILL PUT EXTRA PRESSURE ON SOIL STABILITY.

INDICES DEVELOPED BY THE U.S.G.S. SHOW THAT LANDSLIDES ARE POSSIBLE
DURING INTENSE RAINFALL OR WHEN RAINFALL AMOUNTS EXCEED ONE INCH IN
24 HOURS. OBSERVED RAINFALLS HAVE ALREADY EXCEEDED THAT AMOUNT
TODAY...INCLUDING THE SEATTLE AREA.

WHILE THE U.S.G.S. RAINFALL THRESHOLDS APPLY TO THE SEATTLE AREA OF
PUGET SOUND...MOST OF THE LOWLANDS OF WESTERN WASHINGTON ARE
SUSCEPTIBLE TO LANDSLIDES DUE TO WET SOILS. AREAS MOST SUSCEPTIBLE
TO LANDSLIDES UNDER THESE CONDITIONS ARE STEEP COASTAL BLUFFS AND
OTHER STEEP HILLSIDES. FOR MORE INFORMATION ABOUT CURRENT
CONDITIONS...SEE THE FOLLOWING INTERNET WEB PAGES:

HTTP://WWW.WRH.NOAA.GOV/SEW  (FOR WEATHER FORECASTS ALL LOWER CASE)
HTTP://LANDSLIDES.USGS.GOV/MONITORING/SEATTLE/RTD/PLOT.PHP (ALL
LOWER CASE)

COLMAN/ALBRECHT

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SEATTLE WA
1025 AM PST MON DEC 03 2007

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

0612 AM     FLOOD            2 N BOTHELL             47.79N 122.20W
12/03/2007                   SNOHOMISH          WA   NWS EMPLOYEE

            URBAN FLOODING. I-405 UNDERPASS AT 228TH SW COMPLETELY
            FLOODED BY HEAVY RAINS. ALSO, WATER FLOWING ACROSS
            PORTIONS OF 228TH EAST OF THE I-405 UNDERPASS TO 39TH
            AVENUE. 39TH AVENUE ALSO HAD WATER FLOWING ACROSS PARTS
            OF THE ROAD.

0630 AM     NON-TSTM WND GST 9 ENE HURRICANE RIDGE   48.06N 123.30W
12/03/2007  M54.00 MPH       CLALLAM            WA   TRAINED SPOTTER

            SUSTAINED 35...GUST 54.

0704 AM     HEAVY RAIN       14 NNE SKOKOMISH        47.53N 123.05W
12/03/2007  M7.86 INCH       MASON              WA   TRAINED SPOTTER

            SINCE 5 PM LAST NIGHT...RECEIVED 9 INCHES OF SNOW PRIOR
            TO RAIN.

0708 AM     HEAVY RAIN       3 N STANWOOD            48.28N 122.34W
12/03/2007  M3.00 INCH       SNOHOMISH          WA   TRAINED SPOTTER

            3 INCHES IN LAST 15 HOURS.

0711 AM     NON-TSTM WND GST 2 WSW BELLINGHAM        48.73N 122.50W
12/03/2007  M44.00 MPH       WHATCOM            WA   TRAINED SPOTTER

            GUST TO 44 MPH JUST PAST 6 AM.

0711 AM     NON-TSTM WND GST 11 NE FORKS             48.07N 124.24W
12/03/2007  M47.00 MPH       CLALLAM            WA   TRAINED SPOTTER

            PK WIN 47 MPH. 4.70 INCHES TOTAL PRECIPITATION IN LAST 24
            HRS.

0739 AM     HEAVY RAIN       2 SW LAKE FOREST PARK   47.74N 122.32W
12/03/2007  M2.31 INCH       KING               WA   TRAINED SPOTTER

            2.31 INCHES IN LAST 9 HOURS.

0756 AM     HEAVY RAIN       2 NNE BREMERTON         47.58N 122.69W
12/03/2007  M4.56 INCH       KITSAP             WA   TRAINED SPOTTER

            PRECIPITATION SINCE 5 PM YESTERDAY.

0756 AM     HEAVY RAIN       5 NNW GRAND MOUND       46.88N 123.04W
12/03/2007  M4.38 INCH       THURSTON           WA   TRAINED SPOTTER

            8AM TO 8AM TOTAL PRECIP.

0815 AM     HEAVY RAIN       4 SSE OLYMPIA           46.99N 122.85W
12/03/2007  E3.60 INCH       THURSTON           WA   TRAINED SPOTTER

            RAINFALL ESTIMATED BECAUSE THE RAIN GAUGE OVERFLOWED.
            PONDING OF WATER ON THE ROADWAYS.

0830 AM     HEAVY RAIN       4 NE BLACK DIAMOND      47.35N 121.93W
12/03/2007  M1.04 INCH       KING               WA   TRAINED SPOTTER

            ABOUT AN INCH /1.04/ OF RAIN FELL DURING THE PERIOD FROM
            MIDNIGHT TO 0830 PST.

0830 AM     HEAVY RAIN       22 ENE TAHOLAH          47.46N 123.86W
12/03/2007  M3.52 INCH       GRAYS HARBOR       WA   TRAINED SPOTTER

            10 PM LAST NIGHT TO 8 AM THIS MORNING. LARGE TREE FELL ON
            HOUSE...DAMAGE REPORTED.

0856 AM     HEAVY RAIN       12 SW BREMERTON         47.43N 122.89W
12/03/2007  M6.56 INCH       MASON              WA   TRAINED SPOTTER

            12 HOUR RAINFALL.

0900 AM     NON-TSTM WND GST 7 WNW CLALLAM BAY       48.29N 124.41W
12/03/2007  M93.00 MPH       CLALLAM            WA   TRAINED SPOTTER

            SUST WIN 30-40 MPH...GUST OF 93 MPH.

&&

DDAMICO

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SEATTLE WA
1031 AM PST MON DEC 03 2007

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

0900 AM     HEAVY RAIN       11 NNE OLYMPIA          47.18N 122.77W
12/03/2007  M3.22 INCH       PIERCE             WA   TRAINED SPOTTER

            24 HR PRECIP TOTAL TO 9AM.

0900 AM     HEAVY RAIN       3 ENE REDMOND           47.69N 122.06W
12/03/2007  M2.45 INCH       KING               WA   TRAINED SPOTTER

            FROM 11PM - 7AM.

0922 AM     HEAVY RAIN       5 NNW CHEHALIS          46.73N 123.00W
12/03/2007  M3.70 INCH       LEWIS              WA   TRAINED SPOTTER

            24 HR PRECIP TOTAL TO 9AM.

0922 AM     HEAVY RAIN       3 N CARNATION           47.69N 121.91W
12/03/2007  M3.00 INCH       KING               WA   TRAINED SPOTTER

            24 HR PRECIP TO 9AM.

1002 AM     HEAVY RAIN       10 E PORT TOWNSEND      48.10N 122.57W
12/03/2007  M2.04 INCH       ISLAND             WA   TRAINED SPOTTER

            24 HR PRECIP TO 10 AM.

1023 AM     HEAVY RAIN       3 NE GATE               46.85N 123.11W
12/03/2007  M5.09 INCH       THURSTON           WA   TRAINED SPOTTER

            24 HR PRECIP TO 10 AM.

&&

DDAMICO