Wind Advisory 17, NWS Seattle, WA

344 
WWUS76 KSEW 030552
NPWSEW

URGENT - WEATHER MESSAGE
NATIONAL WEATHER SERVICE SEATTLE WA
952 PM PST WED DEC 2 2015

WAZ516-517-031400-
/O.UPG.KSEW.WI.Y.0017.151203T1400Z-151204T0200Z/
/O.NEW.KSEW.HW.W.0005.151203T2100Z-151204T0500Z/
NORTH COAST-CENTRAL COAST-
952 PM PST WED DEC 2 2015

...HIGH WIND WARNING IN EFFECT FROM 1 PM TO 9 PM PST THURSDAY...

THE NATIONAL WEATHER SERVICE IN SEATTLE HAS ISSUED A HIGH WIND
WARNING...WHICH IS IN EFFECT FROM 1 PM TO 9 PM PST THURSDAY. THE
WIND ADVISORY IS NO LONGER IN EFFECT. 

* WIND...SOUTH TO SOUTHEAST WIND WILL INCREASE TO 30 TO 40 MPH
  THURSDAY AFTERNOON...THEN TURN WESTERLY BY EARLY EVENING. GUSTS
  TO 60 MPH ARE POSSIBLE. WINDS WILL DIMINISH BY LATE THURSDAY
  EVENING.

* SOME AFFECTED LOCATIONS...HOQUIAM...WESTPORT...AND FORKS.

* TIMING...STRONGEST WINDS ARE LIKELY LATE THURSDAY AFTERNOON TO
  EARLY EVENING.

* IMPACTS...HIGH WINDS CAN DAMAGE PROPERTY...TOPPLE TREES...AND 
  TAKE DOWN POWER LINES. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A HIGH WIND WARNING MEANS A HAZARDOUS HIGH WIND EVENT IS EXPECTED OR
OCCURRING. SUSTAINED WIND SPEEDS OF AT LEAST 40 MPH OR GUSTS OF
58 MPH OR MORE CAN LEAD TO PROPERTY DAMAGE.

&&

$$

WAZ001-503-506-510-031400-
/O.UPG.KSEW.WI.Y.0017.151203T1800Z-151204T0600Z/
/O.NEW.KSEW.HW.W.0005.151203T2200Z-151204T0600Z/
SAN JUAN COUNTY-WESTERN WHATCOM COUNTY-WESTERN SKAGIT COUNTY-
ADMIRALTY INLET AREA-
952 PM PST WED DEC 2 2015

...HIGH WIND WARNING IN EFFECT FROM 2 PM TO 10 PM PST THURSDAY...

THE NATIONAL WEATHER SERVICE IN SEATTLE HAS ISSUED A HIGH WIND
WARNING...WHICH IS IN EFFECT FROM 2 PM TO 10 PM PST THURSDAY. THE
WIND ADVISORY IS NO LONGER IN EFFECT. 

* WIND...SOUTH WIND WILL INCREASE TO 25 TO 40 MPH LATE THURSDAY
  AFTERNOON OR EARLY EVENING...THEN TURN SOUTHWESTERLY BEFORE
  EASING LATE IN THE EVENING. GUSTS TO 60 MPH ARE POSSIBLE. 

* SOME AFFECTED LOCATIONS...THE SAN JUAN ISLANDS...BELLINGHAM...
  AND PORT TOWNSEND.

* TIMING...STRONGEST WINDS ARE LIKELY THURSDAY EVENING.

* IMPACTS...HIGH WINDS CAN DAMAGE PROPERTY...TOPPLE TREES...AND
  TAKE DOWN POWER LINES. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A HIGH WIND WARNING MEANS A HAZARDOUS HIGH WIND EVENT IS EXPECTED OR
OCCURRING. SUSTAINED WIND SPEEDS OF AT LEAST 40 MPH OR GUSTS OF
58 MPH OR MORE CAN LEAD TO PROPERTY DAMAGE.

&&

$$

WAZ504-507-509-511-555-556-558-559-031400-
/O.NEW.KSEW.HW.W.0005.151203T2200Z-151204T0600Z/
SOUTHWEST INTERIOR-EVERETT AND VICINITY-TACOMA AREA-HOOD CANAL AREA-
EAST PUGET SOUND LOWLANDS-BELLEVUE AND VICINITY-SEATTLE AND VICINITY-
BREMERTON AND VICINITY-
952 PM PST WED DEC 2 2015

...HIGH WIND WARNING IN EFFECT FROM 2 PM TO 10 PM PST THURSDAY...

THE NATIONAL WEATHER SERVICE IN SEATTLE HAS ISSUED A HIGH WIND
WARNING...WHICH IS IN EFFECT FROM 2 PM TO 10 PM PST THURSDAY. 

* WIND...SOUTH WIND WILL INCREASE TO 25 TO 40 MPH LATE THURSDAY
  AFTERNOON OR EARLY EVENING...THEN TURN SOUTHWESTERLY BEFORE
  EASING LATE IN THE EVENING. GUSTS TO 60 MPH ARE POSSIBLE. 

* SOME AFFECTED LOCATIONS...THE I-5 METRO CORRIDOR INCLUDING
  OLYMPIA...TACOMA...SEATTLE...BELLEVUE...AND EVERETT. OTHER
  LOCATIONS INCLUDE BREMERTON AND HOOD CANAL.

* TIMING...STRONGEST WINDS ARE LIKELY THURSDAY EVENING STARTING
  AROUND THE EVENING COMMUTE.

* IMPACTS...HIGH WINDS CAN DAMAGE PROPERTY...TOPPLE TREES...AND
  TAKE DOWN POWER LINES.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A HIGH WIND WARNING MEANS A HAZARDOUS HIGH WIND EVENT IS EXPECTED OR
OCCURRING. SUSTAINED WIND SPEEDS OF AT LEAST 40 MPH OR GUSTS OF
58 MPH OR MORE CAN LEAD TO PROPERTY DAMAGE.

&&

$$

WAZ514-515-031400-
/O.NEW.KSEW.WI.Y.0018.151204T0000Z-151204T0800Z/
EASTERN STRAIT OF JUAN DE FUCA-WESTERN STRAIT OF JUAN DE FUCA-
952 PM PST WED DEC 2 2015

...WIND ADVISORY IN EFFECT FROM 4 PM THURSDAY TO MIDNIGHT PST
THURSDAY NIGHT...

THE NATIONAL WEATHER SERVICE IN SEATTLE HAS ISSUED A WIND ADVISORY...
WHICH IS IN EFFECT FROM 4 PM THURSDAY TO MIDNIGHT PST THURSDAY
NIGHT. 

* WIND...WESTERLY WIND WILL INCREASE TO 20 TO 35 MPH WITH GUSTS TO
  45 MPH THURSDAY EVENING.

* SOME AFFECTED LOCATIONS...PORT ANGELES...SEQUIM.

* TIMING...THURSDAY EVENING.

* IMPACTS...SMALL TREES MAY TOPPLE AND SOME POWER OUTAGES ARE
  POSSIBLE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A WIND ADVISORY MEANS THAT WINDS OVER 30 MPH ARE EXPECTED. WINDS
THIS STRONG CAN MAKE DRIVING DIFFICULT...ESPECIALLY FOR HIGH
PROFILE VEHICLES. USE EXTRA CAUTION.

&&

$$
WEATHER.GOV/SEATTLE
MERCER

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SEATTLE WA
900 AM PST WED DEC 2 2015

.SYNOPSIS...A FRONT WILL APPROACH THE COAST TODAY AND MOVE INLAND
TONIGHT. HEAVY SNOW AND FREEZING RAIN IS POSSIBLE TONIGHT IN THE
CASCADES. A LOW PRES CENTER IS FORECAST TO MOVE NORTH OFF THE COAST
THURSDAY MORNING THEN INTO SOUTHERN BRITISH COLUMBIA THURSDAY
AFTERNOON...GIVING BREEZY TO WINDY CONDITIONS TO WESTERN WASHINGTON.
UNSETTLED CONDITIONS WILL CONTINUE ON FRIDAY.

&&

.SHORT TERM...NO RADAR ECHOES THIS MORNING THOUGH SATELLITE IMAGERY
SHOWS A FRONT APPROACHING THE COAST. RAIN IS FORECAST TO BEGIN ON
THE COAST LATE THIS AFTERNOON AND SPREAD INLAND OVERNIGHT. RAIN WILL
CONTINUE THURSDAY AND TAPER THURSDAY NIGHT.

THE SNOW LEVEL OVER MOST OF THE AREA DURING THIS EVENT IS FORECAST
TO BE HIGH...7000-8000 FEET...EXCEPT IN THE CASCADES WHERE IT WILL
BE MORE LIKE 4000 FEET. STRONG EASTERLY FLOW WILL KEEP THE PASSES
EVEN COLDER...WELL BELOW FREEZING. THE UPSHOT IS THERE WILL BE
FREEZING RAIN IN THE PASSES ALONG WITH SOME SNOW...AND AT HIGHER
ELEVATIONS THERE WILL BE HEAVY SNOW. A WINTER STORM WATCH IS IN
EFFECT AND IT LIKELY WILL BE UPGRADED TO A WARNING THIS AFTERNOON.

NEXT BIT OF WEATHER IS WIND ON THURSDAY AFTERNOON. A LOW CENTER IS
FORECAST TO MOVE NORTH NORTHEAST OFF THE COAST DURING THE DAY. BY
AFTERNOON AND EVENING IT WILL BE IN SOUTHERN BRITISH COLUMBIA. MODEL
GRADIENTS ARE NOT PARTICULARLY STRONG...KPDX-KBLI IS AROUND +10MB AT
THE STRONGEST...WHICH IMPLIES ADVISORY LEVEL WIND OVER THE COAST AND
NORTH INTERIOR. HOWEVER THE TRACK OF THE LOW IS A GOOD ONE FOR
STRONGER WINDS. A HIGH WIND WATCH REMAINS IN EFFECT FOR THE COAST
AND NORTH INTERIOR THURSDAY AND THURSDAY EVENING.

FRIDAY WILL HAVE A SHORT WAVE SURFACE RIDGE AND A WEAK UPPER TROUGH.
THIS IS A SHOWERY PATTERN. HIGH TEMPERATURES WILL BE 50-55 TODAY AND
THURSDAY WITH SOME COOLING FRIDAY. OVERNIGHT LOWS WILL BE IN THE
40S. BURKE

.LONG TERM...PREVIOUS DISCUSSION...THE WEATHER PATTERN WILL BE
ACTIVE DURING THIS PERIOD DUE TO A PARADE OF PACIFIC STORMS MOVING
ACROSS THE AREA. THERE MAY BE A PERIOD OF SIGNIFICANT SNOWFALL IN
THE MOUNTAINS ON SATURDAY BEFORE SNOW LEVELS RISE. THERE IS STILL A
POSSIBILITY OF AN ATMOSPHERIC RIVER SETTING UP OVER THE AREA EITHER
THIS WEEKEND OR EARLY NEXT WEEK.

&&

.HYDROLOGY...RIVER FLOODING IS UNLIKELY THROUGH FRIDAY. THE
SKOKOMISH RIVER MAY EXPERIENCE MINOR FLOODING THIS WEEKEND OR
EARLY NEXT WEEK.

&&

.AVIATION...THERE WILL BE A BIT OF A BREAK IN THE WEATHER TODAY AND
THEN ANOTHER FRONT WILL MOVE THROUGH WRN WA TONIGHT. THE AIR IS
STABLE AND THE FLOW ALOFT IS SW. WITH LOW LEVEL OFFSHORE FLOW THE
AREAS OF MVFR CLOUDS SHOULD BREAK UP AND GIVE WAY TO A THICKENING
MID LEVEL DECK...AND THEN LOWER CLOUDS WILL REDEVELOP LATER THIS
EVENING AS THE RAIN PUSHES IN.

KSEA...THERE WILL BE PERIODS OF RAIN TONIGHT AND THURSDAY...AND THEN
BLUSTERY SW WINDS ARE POSSIBLE LATER THURSDAY OR THU EVENING.

&&

.MARINE...THE NEXT FRONT WILL MOVE OVER WRN WA TONIGHT AND THAT ONE
STALLS AS ANOTHER FRONTAL WAVE RIDES UP OVER WRN WA THU AFTERNOON.
THAT WILL GIVE THE COASTAL WATERS AND EAST ENTRANCE OF THE STRAIT OF
JUAN DE FUCA A PRETTY LONG PERIOD OF SE GALES TONIGHT AND THURSDAY
AND THEN THERE WILL BE A PUSH OF MORE WLY WINDS FOR THE COAST WITH
THE FRONTAL PASSAGE THU. THE LATEST GFS SHOWS A 992 MB LOW ABOUT 150
MILES OFF ASTORIA AT DAYBREAK THURSDAY AND THAT DEEPENS A BIT AS IT
CROSSES VANCOUVER ISLAND MIDDAY. AS THAT LOW MOVES INTO SW B.C. THU
AFTERNOON SOUTHERLY PRESSURE GRADIENTS WILL RISE AND BY THU EVENING
PUGET SOUND COULD HAVE SSW GALES.

&&

.SEW WATCHES/WARNINGS/ADVISORIES...
WA...WINTER STORM WATCH IN EFFECT FROM THIS EVENING THROUGH THURSDAY
	 AFTERNOON FOR THE CASCADES.

     HIGH WIND WATCH IN EFFECT FROM THURSDAY MORNING THROUGH THURSDAY
	 EVENING FOR THE COAST AND NORTHWEST INTERIOR.

PZ...GALE WARNINGS ARE IN EFFECT FOR THE COASTAL WATERS AND EAST
	 ENTRANCE TO THE STRAIT OF JUAN DE FUCA.

	 SMALL CRAFT ADVISORY IN EFFECT UNTIL 6 PM PST THIS EVENING FOR
	 THE ADMIRALTY  INLET AND NORTHERN INLAND WATERS.

	 SMALL CRAFT ADVISORY IN EFFECT FOR ROUGH BAR FROM NOON TODAY TIL
	 NOON THURSDAY FOR THE GRAYS HARBOR BAR.

&&

WWW.WEATHER.GOV/SEATTLE

AN ILLUSTRATED VERSION OF THIS FORECAST DISCUSSION CAN BE SEEN AT
WWW.WEATHER.GOV/SEATTLE/GAFD/LATEST_WEBAFD.HTML