Small Craft Advisory 1013, NWS Seattle, WA

662 
WHUS76 KSEW 212129
MWWSEW

URGENT - MARINE WEATHER MESSAGE
NATIONAL WEATHER SERVICE SEATTLE WA
229 PM PDT THU JUN 21 2012

.A SMALL CRAFT ADVISORY IS IN EFFECT FOR THE CENTRAL AND EASTERN
STRAIT OF JUAN DE FUCA FOR TONIGHT AND AN ADVISORY HAS BEEN ISSUED
FOR THE NORTHERN INLAND WATERS.

PZZ133-220530-
/O.EXB.KSEW.SC.Y.1013.120622T0000Z-120622T1600Z/
NORTHERN INLAND WATERS INCLUDING THE SAN JUAN ISLANDS-
229 PM PDT THU JUN 21 2012

...SMALL CRAFT ADVISORY IN EFFECT UNTIL 9 AM PDT FRIDAY...

THE NATIONAL WEATHER SERVICE IN SEATTLE HAS ISSUED A SMALL CRAFT
ADVISORY...WHICH IS IN EFFECT UNTIL 9 AM PDT FRIDAY. 

* WIND AND WAVES...SOUTHWEST WIND WILL INCREASE TONIGHT AND
  SOUTHERLY WIND 15 TO 25 KNOTS WITH WIND WAVES 2 OR 3 FEET IS
  EXPECTED LATER TONIGHT AND FRIDAY MORNING AS MARINE AIR PUSHES
  THROUGH THE NORTHERN INLAND WATERS.

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.

&&

$$

PZZ131-132-220530-
/O.EXT.KSEW.SC.Y.1013.120622T0000Z-120622T1600Z/
CENTRAL U.S. WATERS STRAIT OF JUAN DE FUCA-
EAST ENTRANCE U.S. WATERS STRAIT OF JUAN DE FUCA-
229 PM PDT THU JUN 21 2012

...SMALL CRAFT ADVISORY NOW IN EFFECT UNTIL 9 AM PDT FRIDAY...

* WIND AND WAVES...WEST 15 TO 25 KNOTS WITH WIND WAVES 2 TO 4 
  FEET TONIGHT. 

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.

&&

$$


WWW.WEATHER.GOV/SEATTLE

083 
WHUS76 KSEW 220348
MWWSEW

URGENT - MARINE WEATHER MESSAGE
NATIONAL WEATHER SERVICE SEATTLE WA
848 PM PDT THU JUN 21 2012

.A SMALL CRAFT ADVISORY IS IN EFFECT FOR THE CENTRAL AND EASTERN
STRAIT OF JUAN DE FUCA FOR TONIGHT AND AN ADVISORY HAS BEEN
ISSUED FOR THE NORTHERN INLAND WATERS.

PZZ131>133-221200-
/O.CON.KSEW.SC.Y.1013.000000T0000Z-120622T1600Z/
CENTRAL U.S. WATERS STRAIT OF JUAN DE FUCA-
EAST ENTRANCE U.S. WATERS STRAIT OF JUAN DE FUCA-
NORTHERN INLAND WATERS INCLUDING THE SAN JUAN ISLANDS-
848 PM PDT THU JUN 21 2012

...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 9 AM PDT FRIDAY...

* WIND AND WAVES...WEST 15 TO 25 KNOTS WITH WIND WAVES 2 TO 4
  FEET...EXCEPT WINDS SOUTHWEST OVER THE NORTHERN INLAND WATERS.

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.

&&

$$


WWW.WEATHER.GOV/SEATTLE

220 
WHUS76 KSEW 220931
MWWSEW

URGENT - MARINE WEATHER MESSAGE
NATIONAL WEATHER SERVICE SEATTLE WA
231 AM PDT FRI JUN 22 2012

.A SMALL CRAFT ADVISORY IS IN EFFECT FOR THE CENTRAL AND EASTERN
STRAIT OF JUAN DE FUCA FOR TONIGHT AND AN ADVISORY HAS BEEN
ISSUED FOR THE NORTHERN INLAND WATERS.

PZZ131>133-221600-
/O.CON.KSEW.SC.Y.1013.000000T0000Z-120622T1600Z/
CENTRAL U.S. WATERS STRAIT OF JUAN DE FUCA-
EAST ENTRANCE U.S. WATERS STRAIT OF JUAN DE FUCA-
NORTHERN INLAND WATERS INCLUDING THE SAN JUAN ISLANDS-
231 AM PDT FRI JUN 22 2012

...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 9 AM PDT THIS
MORNING...

* WIND AND WAVES...WEST TO SOUTHWEST WIND 15 TO 30 KNOTS WITH WIND
  WAVES 2 TO 5 FEET. WINDS AND SEAS WILL SUBSIDE MID 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.

&&

$$


WWW.WEATHER.GOV/SEATTLE

226 
WHUS76 KSEW 221557
MWWSEW

URGENT - MARINE WEATHER MESSAGE
NATIONAL WEATHER SERVICE SEATTLE WA
857 AM PDT FRI JUN 22 2012

.A SMALL CRAFT ADVISORY IS IN EFFECT FOR THE CENTRAL AND EASTERN
STRAIT OF JUAN DE FUCA FOR TONIGHT AND AN ADVISORY HAS BEEN
ISSUED FOR THE NORTHERN INLAND WATERS.

PZZ132-133-221700-
/O.CAN.KSEW.SC.Y.1013.000000T0000Z-120622T1600Z/
EAST ENTRANCE U.S. WATERS STRAIT OF JUAN DE FUCA-
NORTHERN INLAND WATERS INCLUDING THE SAN JUAN ISLANDS-
857 AM PDT FRI JUN 22 2012

...SMALL CRAFT ADVISORY HAS ENDED...

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



$$

PZZ131-221900-
/O.EXT.KSEW.SC.Y.1013.000000T0000Z-120622T1900Z/
CENTRAL U.S. WATERS STRAIT OF JUAN DE FUCA-
857 AM PDT FRI JUN 22 2012

...SMALL CRAFT ADVISORY NOW IN EFFECT UNTIL NOON PDT TODAY...

* WIND AND WAVES...WEST TO SOUTHWEST WIND 15 TO 25 KNOTS WITH WIND
  WAVES 1 TO 3 FEET. WINDS AND SEAS WILL SUBSIDE THIS AFTERNOON.

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.

&&

$$


WWW.WEATHER.GOV/SEATTLE

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SEATTLE WA
325 AM PDT THU JUN 21 2012

.SYNOPSIS...AN UPPER RIDGE WILL KEEP THE REGION DRY TODAY. A WEAK
FRONT WILL MOVE INTO WESTERN WASHINGTON FRIDAY FOR A RETURN TO
SHOWERS AND BELOW NORMAL TEMPERATURES. AN UPPER LOW OVER THE
OFFSHORE WATERS OF THE PACIFIC NORTHWEST WILL KEEP SHOWERS AND
COOLER TEMPERATURES IN THE FORECAST THIS WEEKEND AND EARLY NEXT WEEK.

&&

.SHORT TERM...SOUTHERLY FLOW ALOFT WILL INCREASE OVER THE AREA
TODAY. THIS WILL HELP WARM THE AIR MASS A FEW DEGREES AND PRODUCE
HIGHS SLIGHTLY WARMER COMPARED TO WEDNESDAY...70S MOST AREAS. SKIES
WILL BE MOSTLY SUNNY WITH SOME HIGH CLOUDS AT TIMES. AS THE FLOW
ALOFT BECOMES INCREASING SOUTHERLY TONIGHT...A SMALL CHANCE OF
THUNDERSTORMS IS INTRODUCED TO THE CASCADES NEAR THE CREST.

LOW LEVEL ONSHORE FLOW WILL INCREASE TONIGHT AND FRIDAY. AT THE SAME
TIME...THE SOUTHERLY FLOW ALOFT WILL BECOME INCREASINGLY MOIST AS AN
UPPER LOW MOVES INTO THE OFFSHORE WATERS. SHOWERS WILL BECOME LIKELY
ALL AREAS ON FRIDAY AS AN EMBEDDED SHORT WAVE ROTATES THROUGH THE
AREA IN THE SOUTHERLY FLOW ALOFT. THE ADDITIONAL CLOUDS AND ONSHORE
FLOW WILL RESULT IN HIGHS COOLING 10+ DEGREES FRIDAY.

THE UPPER LOW WILL REMAIN QUASI-STATIONARY OVER THE OFFSHORE WATERS
INTO SATURDAY WITH CONTINUE MOIST UNSTABLE SOUTHERLY FLOW ALOFT FOR
WESTERN WASHINGTON. THIS WILL KEEP THE WEATHER COOL AND SHOWERY. ALL
MODELS SUGGEST AN UPTICK IN SHOWER ACTIVITY IN THE AFTERNOON AS
ANOTHER SHORT WAVE ROTATES THROUGH. SCHNEIDER

.LONG TERM...THE UPPER LOW OVER THE OFFSHORE WATERS WILL ELONGATE...
WEAKEN...AND SLOWLY SHIFT INLAND SUNDAY THROUGH WEDNESDAY. NOT
SURPRISINGLY...THE MODELS DIFFER WITH THE DETAIL. THE CURRENT
BROADBRUSH MOSTLY CLOUDY WITH A CHANCE OF SHOWERS FORECAST LOOKS
GOOD FOR NOW. HIGH TEMPERATURES WILL CONTINUE A BIT BELOW NORMAL
DURING THIS PERIOD AS WELL. SCHNEIDER

&&

.AVIATION...A FRONT AND ASSOCIATED UPPER TROUGH OVER THE OFFSHORE
WATERS WILL SPREAD OCCASIONAL MID AND HIGH CLOUDS INTO THE AREA
TODAY IN SOUTHWEST FLOW ALOFT. THE LOWER LEVELS WILL BE MAINLY DRY
AND STABLE...BUT THERE MAY BE SOME PATCHY SHALLOW FOG UNTIL ABOUT
15Z THIS MORNING OVER SOME OF THE RIVER VALLEYS OF THE SOUTH
INTERIOR. LOW LEVEL FLOW WILL BE LIGHT NORTHWESTERLY TODAY.

ONSHORE FLOW WILL INCREASE 21Z-00Z THIS AFTERNOON WITH DIURNAL
HEATING IN THE INTERIOR AND THE FORMATION OF A PREFRONTAL RIDGE
ALONG THE COAST. STRATUS WILL THEN MOVE ONSHORE AROUND 03Z THEN PUSH
INTO THE INTERIOR TERMINALS LIKE KSEA SHORTLY AFTER 10Z FRI.
FORECAST MODELS AND MODEL OUTPUT STATISTICS APPEAR REASONABLE IN
BRINGING CEILINGS INITIALLY DOWN TO 008-015 TONIGHT AND FRI MORNING
BEFORE THEY LIFT WITH MIXING MID MORNING FRI.

KSEA...GOOD VFR CONDITIONS WITH ONLY OCCASIONAL MID AND HIGH LEVEL
MOISTURE UNTIL ABOUT 10Z FRI. NORTHEAST WIND 3-7 KT WILL BECOME NWLY
5-9 KT AFTER 18Z TODAY THEN WILL SHIFT TO SW 7-10 KT AFTER ABOUT 04Z
THIS EVENING. ALBRECHT

&&

.MARINE...LIGHT ONSHORE FLOW IS EXPECTED THROUGH MID AFTERNOON TODAY
AS A WEAK RIDGE OF HIGH PRES EXTENDING FROM CENTRAL VANCOUVER ISLAND
INTO THE OREGON OFFSHORE WATERS PUSHES EAST. LIGHT NWLY FLOW IS
EXPECTED OVER THE COASTAL AND INLAND WATERS TODAY.

THE COMBINATION OF HEATING OVER THE INTERIOR AND THE RIDGE IN THE
COASTAL WATERS LATE THIS AFTERNOON AND THIS EVENING WILL INCREASE
ONSHORE FLOW LATE OVER THE STRAIT OF JUAN DE FUCA. SMALL CRAFT
ADVISORY CONDITIONS ARE EXPECTED AFTER ABOUT 5 PM OVER THE CENTRAL
STRAIT AND AT THE EAST ENTRANCE.

PRESSURE GRADIENTS WILL RELAX SOMEWHAT ON FRIDAY AS A WEAK FRONT
PUSHES ACROSS THE WATERS. MODERATE ONSHORE FLOW WILL RESUME BEHIND
THE FRONT FRIDAY AFTERNOON AND EVENING WITH ANOTHER ROUND OF SMALL
CRAFT ADVISORY CONDITIONS IN THE CENTRAL STRAIT AND AT THE EAST
ENTRANCE. ALBRECHT

&&

.SEW WATCHES/WARNINGS/ADVISORIES...
WA...NONE.
PZ...NONE.

&&

YOU CAN SEE AN ILLUSTRATED VERSION OF THE FORECAST DISCUSSION AT
WWW.WEATHER.GOV/SEATTLE/GAFD/LATEST_WEBAFD.HTML.

WWW.WEATHER.GOV/SEATTLE