Small Craft Advisory 970, NWS Seattle, WA

092 
WHUS76 KSEW 261604
MWWSEW

URGENT - MARINE WEATHER MESSAGE
NATIONAL WEATHER SERVICE SEATTLE WA
904 AM PDT THU APR 26 2012

PZZ131-132-270000-
/O.EXA.KSEW.SC.Y.0970.120426T1800Z-120427T0000Z/
CENTRAL U.S. WATERS STRAIT OF JUAN DE FUCA-
EAST ENTRANCE U.S. WATERS STRAIT OF JUAN DE FUCA-
904 AM PDT THU APR 26 2012

...SMALL CRAFT ADVISORY IN EFFECT UNTIL 5 PM PDT THIS AFTERNOON...

THE NATIONAL WEATHER SERVICE IN SEATTLE HAS ISSUED A SMALL CRAFT
ADVISORY...WHICH IS IN EFFECT UNTIL 5 PM PDT THIS AFTERNOON. 

* WIND AND WAVES...WEST AND SOUTHWEST WIND 15 TO 25 KNOTS FOR THE
  REST OF TODAY. WIND WAVES 1 TO 4 FEET. WINDS AND WAVES EASING
  THIS EVENING.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A SMALL CRAFT ADVISORY MEANS THAT WIND SPEEDS OF 21 TO 33 KNOTS
ARE EXPECTED TO PRODUCE HAZARDOUS WAVE CONDITIONS TO SMALL CRAFT.
INEXPERIENCED MARINERS...ESPECIALLY THOSE OPERATING SMALLER
VESSELS SHOULD AVOID NAVIGATING IN THESE CONDITIONS.

&&

$$

PZZ135-270000-
/O.CON.KSEW.SC.Y.0970.120426T1800Z-120427T0000Z/
PUGET SOUND AND HOOD CANAL-
904 AM PDT THU APR 26 2012

...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 5 PM PDT THIS
AFTERNOON...

* WIND AND WAVES...SOUTHWEST WIND INCREASING TO 15 TO 25 KNOTS FOR
  A FEW HOURS THIS AFTERNOON. WIND WAVES BUILDING TO 2 TO 4 FEET.
  WINDS AND WAVES EASING THIS EVENING.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A SMALL CRAFT ADVISORY MEANS THAT WIND SPEEDS OF 21 TO 33 KNOTS
ARE EXPECTED TO PRODUCE HAZARDOUS WAVE CONDITIONS TO SMALL CRAFT.
INEXPERIENCED MARINERS...ESPECIALLY THOSE OPERATING SMALLER
VESSELS SHOULD AVOID NAVIGATING IN THESE CONDITIONS.

&&

$$

PZZ170-173-176-270015-
/O.CON.KSEW.SW.Y.0037.120427T0100Z-120428T0100Z/
WATERS FROM CAPE FLATTERY TO JAMES ISLAND 10 TO 60 NM-
WATERS FROM JAMES ISLAND TO POINT GRENVILLE 10 TO 60 NM-
WATERS FROM POINT GRENVILLE TO CAPE SHOALWATER 10 TO 60 NM-
904 AM PDT THU APR 26 2012

...SMALL CRAFT ADVISORY FOR HAZARDOUS SEAS REMAINS IN EFFECT FROM
6 PM THIS EVENING TO 6 PM PDT FRIDAY...

* SEAS/SWELLS...WEST SWELL 10 TO 12 FEET TONIGHT THROUGH FRIDAY 
  AFTERNOON. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A SMALL CRAFT ADVISORY FOR HAZARDOUS SEAS MEANS THAT WAVES WILL
BE HAZARDOUS TO SMALL CRAFT. MARINERS SHOULD AVOID SHOALING
AREAS. LONG PERIOD SWELL CAN SHARPEN INTO LARGE BREAKING WAVES IN
SHOALING AREAS. IT IS NOT UNUSUAL FOR WAVES TO BREAK MUCH FARTHER
FROM SHOALING AREAS THAN IS NORMALLY EXPERIENCED. REMEMBER...
BREAKING WAVES CAN EASILY CAPSIZE EVEN LARGER VESSELS.

&&

$$


WWW.WEATHER.GOV/SEATTLE

535 
WHUS76 KSEW 262201
MWWSEW

URGENT - MARINE WEATHER MESSAGE
NATIONAL WEATHER SERVICE SEATTLE WA
301 PM PDT THU APR 26 2012

PZZ153-156-270615-
/O.EXA.KSEW.SW.Y.0037.120427T0100Z-120428T0100Z/
COASTAL WATERS FROM JAMES ISLAND TO POINT GRENVILLE OUT 10 NM-
COASTAL WATERS FROM POINT GRENVILLE TO CAPE SHOALWATER OUT 10 NM-
301 PM PDT THU APR 26 2012

...SMALL CRAFT ADVISORY FOR HAZARDOUS SEAS IN EFFECT FROM 6 PM
THIS EVENING TO 6 PM PDT FRIDAY...

THE NATIONAL WEATHER SERVICE IN SEATTLE HAS ISSUED A SMALL CRAFT
ADVISORY FOR HAZARDOUS SEAS...WHICH IS IN EFFECT FROM 6 PM THIS
EVENING TO 6 PM PDT FRIDAY. 

* SEAS/SWELLS...WEST SWELL 8 TO 10 FEET TONIGHT THROUGH FRIDAY 
  AFTERNOON. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A SMALL CRAFT ADVISORY FOR HAZARDOUS SEAS MEANS THAT WAVES WILL
BE HAZARDOUS TO SMALL CRAFT. MARINERS SHOULD AVOID SHOALING
AREAS. LONG PERIOD SWELL CAN SHARPEN INTO LARGE BREAKING WAVES IN
SHOALING AREAS. IT IS NOT UNUSUAL FOR WAVES TO BREAK MUCH FARTHER
FROM SHOALING AREAS THAN IS NORMALLY EXPERIENCED. REMEMBER...
BREAKING WAVES CAN EASILY CAPSIZE EVEN LARGER VESSELS.

&&

$$

PZZ131-132-270615-
/O.EXT.KSEW.SC.Y.0970.000000T0000Z-120427T1500Z/
CENTRAL U.S. WATERS STRAIT OF JUAN DE FUCA-
EAST ENTRANCE U.S. WATERS STRAIT OF JUAN DE FUCA-
301 PM PDT THU APR 26 2012

...SMALL CRAFT ADVISORY NOW IN EFFECT UNTIL 8 AM PDT FRIDAY...

* WIND AND WAVES...WEST AND SOUTHWEST WIND 15 TO 25 KNOTS INTO
  EARLY FRIDAY MORNING. WIND WAVES 1 TO 4 FEET. WIND AND WAVES
  EASING LATE FRIDAY MORNING.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A SMALL CRAFT ADVISORY MEANS THAT WIND SPEEDS OF 21 TO 33 KNOTS
ARE EXPECTED TO PRODUCE HAZARDOUS WAVE CONDITIONS TO SMALL CRAFT.
INEXPERIENCED MARINERS...ESPECIALLY THOSE OPERATING SMALLER
VESSELS SHOULD AVOID NAVIGATING IN THESE CONDITIONS.

&&

$$

PZZ135-270400-
/O.EXT.KSEW.SC.Y.0970.000000T0000Z-120427T0400Z/
PUGET SOUND AND HOOD CANAL-
301 PM PDT THU APR 26 2012

...SMALL CRAFT ADVISORY NOW IN EFFECT UNTIL 9 PM PDT THIS
EVENING...

* WIND AND WAVES...SOUTHWEST WIND 15 TO 25 KNOTS INTO EARLY THIS
  EVENING. STRONGEST WIND OVER SOUTH PUGET SOUND AND THE SOUTH END
  OF HOOD CANAL. WIND WAVES 2 TO 4 FEET. WINDS AND WAVES EASING
  BY LATE THIS EVENING.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A SMALL CRAFT ADVISORY MEANS THAT WIND SPEEDS OF 21 TO 33 KNOTS
ARE EXPECTED TO PRODUCE HAZARDOUS WAVE CONDITIONS TO SMALL CRAFT.
INEXPERIENCED MARINERS...ESPECIALLY THOSE OPERATING SMALLER
VESSELS SHOULD AVOID NAVIGATING IN THESE CONDITIONS.

&&

$$

PZZ170-173-176-270615-
/O.CON.KSEW.SW.Y.0037.120427T0100Z-120428T0100Z/
WATERS FROM CAPE FLATTERY TO JAMES ISLAND 10 TO 60 NM-
WATERS FROM JAMES ISLAND TO POINT GRENVILLE 10 TO 60 NM-
WATERS FROM POINT GRENVILLE TO CAPE SHOALWATER 10 TO 60 NM-
301 PM PDT THU APR 26 2012

...SMALL CRAFT ADVISORY FOR HAZARDOUS SEAS REMAINS IN EFFECT FROM
6 PM THIS EVENING TO 6 PM PDT FRIDAY...

* SEAS/SWELLS...WEST SWELL 10 FEET TONIGHT THROUGH FRIDAY
  AFTERNOON.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A SMALL CRAFT ADVISORY FOR HAZARDOUS SEAS MEANS THAT WAVES WILL
BE HAZARDOUS TO SMALL CRAFT. MARINERS SHOULD AVOID SHOALING
AREAS. LONG PERIOD SWELL CAN SHARPEN INTO LARGE BREAKING WAVES IN
SHOALING AREAS. IT IS NOT UNUSUAL FOR WAVES TO BREAK MUCH FARTHER
FROM SHOALING AREAS THAN IS NORMALLY EXPERIENCED. REMEMBER...
BREAKING WAVES CAN EASILY CAPSIZE EVEN LARGER VESSELS.

&&

$$


WWW.WEATHER.GOV/SEATTLE

380 
WHUS76 KSEW 270402
MWWSEW

URGENT - MARINE WEATHER MESSAGE
NATIONAL WEATHER SERVICE SEATTLE WA
902 PM PDT THU APR 26 2012

PZZ135-270515-
/O.CAN.KSEW.SC.Y.0970.000000T0000Z-120427T0400Z/
PUGET SOUND AND HOOD CANAL-
902 PM PDT THU APR 26 2012

...SMALL CRAFT ADVISORY IS CANCELLED...

THE NATIONAL WEATHER SERVICE IN SEATTLE HAS CANCELLED THE SMALL
CRAFT ADVISORY.

$$

PZZ131-132-271215-
/O.CON.KSEW.SC.Y.0970.000000T0000Z-120427T1500Z/
CENTRAL U.S. WATERS STRAIT OF JUAN DE FUCA-
EAST ENTRANCE U.S. WATERS STRAIT OF JUAN DE FUCA-
902 PM PDT THU APR 26 2012

...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 8 AM PDT FRIDAY...

* WIND AND WAVES...WEST AND SOUTHWEST WIND 15 TO 25 KNOTS INTO 
  EARLY FRIDAY MORNING. WIND WAVES 1 TO 4 FEET. WIND AND WAVES 
  EASING LATE FRIDAY MORNING. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A SMALL CRAFT ADVISORY MEANS THAT WIND SPEEDS OF 21 TO 33 KNOTS
ARE EXPECTED TO PRODUCE HAZARDOUS WAVE CONDITIONS TO SMALL CRAFT.
INEXPERIENCED MARINERS...ESPECIALLY THOSE OPERATING SMALLER
VESSELS SHOULD AVOID NAVIGATING IN THESE CONDITIONS.

&&

$$

PZZ153-156-170-173-176-271215-
/O.CON.KSEW.SW.Y.0037.000000T0000Z-120428T0100Z/
COASTAL WATERS FROM JAMES ISLAND TO POINT GRENVILLE OUT 10 NM-
COASTAL WATERS FROM POINT GRENVILLE TO CAPE SHOALWATER OUT 10 NM-
WATERS FROM CAPE FLATTERY TO JAMES ISLAND 10 TO 60 NM-
WATERS FROM JAMES ISLAND TO POINT GRENVILLE 10 TO 60 NM-
WATERS FROM POINT GRENVILLE TO CAPE SHOALWATER 10 TO 60 NM-
902 PM PDT THU APR 26 2012

...SMALL CRAFT ADVISORY FOR HAZARDOUS SEAS REMAINS IN EFFECT
UNTIL 6 PM PDT FRIDAY...

* SEAS/SWELLS...WEST SWELL 8 TO 10 FEET TONIGHT THROUGH FRIDAY 
  AFTERNOON. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A SMALL CRAFT ADVISORY FOR HAZARDOUS SEAS MEANS THAT WAVES WILL
BE HAZARDOUS TO SMALL CRAFT. MARINERS SHOULD AVOID SHOALING
AREAS. LONG PERIOD SWELL CAN SHARPEN INTO LARGE BREAKING WAVES IN
SHOALING AREAS. IT IS NOT UNUSUAL FOR WAVES TO BREAK MUCH FARTHER
FROM SHOALING AREAS THAN IS NORMALLY EXPERIENCED. REMEMBER...
BREAKING WAVES CAN EASILY CAPSIZE EVEN LARGER VESSELS.

&&

$$


WWW.WEATHER.GOV/SEATTLE

431 
WHUS76 KSEW 270958
MWWSEW

URGENT - MARINE WEATHER MESSAGE
NATIONAL WEATHER SERVICE SEATTLE WA
258 AM PDT FRI APR 27 2012

PZZ131-132-271100-
/O.CAN.KSEW.SC.Y.0970.000000T0000Z-120427T1500Z/
CENTRAL U.S. WATERS STRAIT OF JUAN DE FUCA-
EAST ENTRANCE U.S. WATERS STRAIT OF JUAN DE FUCA-
258 AM PDT FRI APR 27 2012

...SMALL CRAFT ADVISORY IS CANCELLED...

THE NATIONAL WEATHER SERVICE IN SEATTLE HAS CANCELLED THE SMALL
CRAFT ADVISORY.

$$

PZZ153-156-170-173-176-271800-
/O.CON.KSEW.SW.Y.0037.000000T0000Z-120428T0100Z/
COASTAL WATERS FROM JAMES ISLAND TO POINT GRENVILLE OUT 10 NM-
COASTAL WATERS FROM POINT GRENVILLE TO CAPE SHOALWATER OUT 10 NM-
WATERS FROM CAPE FLATTERY TO JAMES ISLAND 10 TO 60 NM-
WATERS FROM JAMES ISLAND TO POINT GRENVILLE 10 TO 60 NM-
WATERS FROM POINT GRENVILLE TO CAPE SHOALWATER 10 TO 60 NM-
258 AM PDT FRI APR 27 2012

...SMALL CRAFT ADVISORY FOR HAZARDOUS SEAS REMAINS IN EFFECT
UNTIL 6 PM PDT THIS EVENING...

* SEAS/SWELLS...WEST SWELL 10 FEET TODAY SUBSIDING TONIGHT.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A SMALL CRAFT ADVISORY FOR HAZARDOUS SEAS MEANS THAT WAVES WILL
BE HAZARDOUS TO SMALL CRAFT. MARINERS SHOULD AVOID SHOALING
AREAS. LONG PERIOD SWELL CAN SHARPEN INTO LARGE BREAKING WAVES IN
SHOALING AREAS. IT IS NOT UNUSUAL FOR WAVES TO BREAK MUCH FARTHER
FROM SHOALING AREAS THAN IS NORMALLY EXPERIENCED. REMEMBER...
BREAKING WAVES CAN EASILY CAPSIZE EVEN LARGER VESSELS.

&&

$$


WWW.WEATHER.GOV/SEATTLE

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SEATTLE WA
910 PM WED APR 25 2012

.SYNOPSIS...A FRONTAL SYSTEM WILL MOVE SLOWLY THROUGH WESTERN
WASHINGTON LATE TONIGHT. AN UPPER LEVEL TROUGH JUST OFFSHORE WILL
MOVE INLAND THURSDAY AFTERNOON AND THURSDAY NIGHT. A WEAK
WEATHER SYSTEM WILL BRING CLOUDS AND A CHANCE OF SHOWERS TO WESTERN
WASHINGTON OVER THE WEEKEND...DESPITE HIGH PRESSURE BUILDING INTO
THE AREA. A NEW UPPER LEVEL TROUGH WILL DEVELOP OVER THE NORTHEAST
PACIFIC BY THE MIDDLE OF NEXT WEEK.

&&

.SHORT TERM...SATELLITE IMAGERY...BUOY OBSERVATIONS...AND THE
LANGLEY HILL RADAR ON THE WASHINGTON COAST ALL SHOW THE INCOMING
COLD FRONT MOVING SLOWLY THROUGH THE OUTER COASTAL WATERS THIS
EVENING. THE NAM SOLUTION THAT BRINGS THE FRONT TO THE INTERSTATE 5
CORRIDOR BETWEEN 09Z AND 12Z TONIGHT LOOKS GOOD...AND PERIODS OF
RAIN WILL CONTINUE OVER MOST OF THE AREA OVERNIGHT AHEAD OF THIS
FRONT. ISOLATED CONVECTION THAT MOVED NORTH FROM LEWIS COUNTY TO
EAST KING COUNTY LATE THIS AFTERNOON HAS WEAKENED AND MOVED
NORTHEAST OF THE AREA THIS EVENING. MAINLY STRATIFORM PRECIPITATION
IS EXPECTED FOR THE REST OF THE NIGHT.

A TROUGH OF LOW PRESSURE ALOFT EXTENDS SOUTHWARD FROM A WEAK SURFACE
LOW NEAR 47N 135W THIS EVENING. IT IS THIS TROUGH THAT WILL MOVE
ACROSS THE AREA LATE THURSDAY AFTERNOON AND THURSDAY EVENING. THE
00Z NAM12 BUFR SOUNDINGS AND TIME HEIGHT FORECAST SHOW THE MID
LEVELS COOLING RAPIDLY AFTER ABOUT 20Z WITH LIFTED INDICES FALLING
TO -1.5 TO -2 AND CAPES TO ABOUT 300 J/KG. ADJUSTING THE SOUNDINGS
FOR SOME LOCAL CLEARING IN THE AFTERNOON AND THESE VALUES ARE LIKELY
TO BE MORE UNSTABLE. STATISTICAL GUIDANCE FROM THE 18Z GFS SHOWS
CONDITIONAL PROBABILITIES OF TSTMS 30-40 PERCENT. ADDED A CHANCE OF
TSTMS FOR ALL ZONES THU AFTERNOON AND EVENING IN RESPONSE. THIS
LINES UP WELL WITH THE PORTLAND FORECAST OFFICE.

ANOTHER SHORT WAVE FEATURE BRINGS SCATTERED SHOWERS FRIDAY. ALBRECHT

.LONG TERM...PREVIOUS LONG TERM DISCUSSION FOLLOWS...THE MODELS ARE
A LOT DRIPPIER OVER WRN WA FOR THE WEEKEND...THE SYSTEM CURRENTLY
OUT AT 160W SNEAKS INTO THE AREA BEFORE THE UPPER RIDGE GETS A
CHANCE TO BUILD MUCH. I DIDN'T GO CRAZY ON THE POPS...JUST SNEAKING
A CHANCE OF SHOWERS AND MORE CLOUDS INTO THE FORECAST. I COULD SEE
THE WEEKEND HAVING A LOT OF MORNING LOW CLOUDS BUT THEN SOME
AFTERNOON AND EVENING SUN. AS IT STANDS NOW MONDAY HAS CHANCE OF
BEING DRY AND SUNNY...BEFORE A NEW UPPER LEVEL TROUGH DEVELOPS IN
THE NE PACIFIC. 19

&&

.AVIATION...AN UPPER LEVEL TROUGH OFFSHORE WITH MOIST SOUTHWESTERLY
FLOW OVER WESTERN WASHINGTON WILL CONTINUE THIS EVENING. AN EMBEDDED
COLD FRONT JUST OFFSHORE WILL MOVE GRADUALLY EAST ACROSS WESTERN
WASHINGTON 06Z-12Z THURSDAY. THE UPPER LEVEL TROUGH WILL DRIFT
ACROSS WESTERN WASHINGTON THURSDAY AFTERNOON INTO FRIDAY MORNING
WITH A SOMEWHAT UNSTABLE AIR MASS.

RAIN ASSOCIATED WITH THE FRONT FINALLY MOVING INLAND THIS EVENING.
CEILINGS GENERALLY IN THE 1500 TO 3000 FOOT RANGE WITH LOCAL
VISIBILITIES 3-5SM UNTIL THE FRONT PASSES THROUGH IN THE EARLY
MORNING HOURS. WITH THE WEAK ONSHORE FLOW BEHIND THE FRONT THERE
STILL COULD BE SOME MVFR CEILINGS AROUND IN THE MORNING HOURS BUT BY
MIDDAY SC DECKS IN THE 4000-6000 FOOT RANGE. WITH THE UNSTABLE AIR
MASS THERE IS A CHANCE OF ISOLATED THUNDERSTORMS BY LATE AFTERNOON.
HIGHER TERRAIN WILL REMAIN OBSCURED UNTIL MIDDAY THURSDAY.

KSEA...CEILINGS IN THE 1500 TO 2500 FEET UNTIL THE FRONT PASSES
THROUGH. COULD SEE A CONTINUATION OF THE MVFR CEILINGS BEHIND THE
FRONT BUT BY MIDDAY CEILINGS SHOULD BE IN THE 4000 TO 6000 FOOT
RANGE. WINDS SOUTHERLY 4 TO 8 KNOTS BECOMING SOUTHWESTERLY 8 TO 12
KNOTS AFTER 12Z. FELTON

&&

.MARINE...A SLOW MOVING COLD FRONT JUST OFFSHORE WITH SMALL CRAFT
ADVISORY WINDS OVER THE COASTAL WATERS...ENTRANCES TO THE
STRAIT...ADMIRALTY INLET AND OVER THE NORTHERN INLAND WATERS. TIMING
OF THE FRONT UNCHANGED IN THE LAST FEW HOURS WITH THE FRONT REACHING
THE COAST AROUND 06Z MOVING EASTWARD INTO THE CASCADES AFTER 12Z.
WINDS WILL EASE QUICKLY BEHIND THE FRONT EXCEPT OVER THE CENTRAL AND
EASTERN STRAIT WITH SMALL CRAFT ADVISORY POST FRONTAL WESTERLIES
LIKELY. PUGET SOUND AND HOOD CANAL MAY ALSO GET A BRIEF PERIOD OF
SMALL CRAFT WINDS THURSDAY AFTERNOON WITH THE INCREASING SOUTHERLY
GRADIENTS BEHIND THE FRONT.

WINDS EASE THURSDAY NIGHT INTO FRIDAY WITH WEAK ONSHORE GRADIENTS.
THE NEXT FRONT WEAKENS AS IT MOVES INTO THE AREA ON SATURDAY AND
WINDS ARE EXPECTED TO REMAIN BELOW 20 KNOTS EXCEPT POSSIBLY ACROSS
THE COASTAL WATERS. HIGH PRESSURE BUILDING INTO THE COASTAL WATERS
ON SUNDAY WITH SMALL CRAFT ADVISORY WINDS DEVELOPING OVER THE
CENTRAL AND EASTERN STRAIT SUN EVENING.

WESTERLY SWELLS JUST UNDER 10 FEET TONIGHT INTO THURSDAY WILL BUILD
INTO THE 10 TO 12 FOOT RANGE LATE THU NIGHT INTO FRIDAY MORNING.
COLMAN/FELTON

&&

.SEW WATCHES/WARNINGS/ADVISORIES...
WA...NONE.
PZ...SMALL CRAFT ADVISORIES ARE IN EFFECT FOR THE COASTAL WATERS...
     ENTRANCES TO THE STRAIT OF JUAN DE FUCA...NORTHERN INLAND
     WATERS...AND ADMIRALTY INLET.

&&

FOR THE GRAPHICAL AFD VISIT...
WWW.WEATHER.GOV/SEATTLE/GAFD/LATEST_WEBAFD.HTML