Area Forecast Discussion
Issued by NWS Seattle/Tacoma, WA

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000
FXUS66 KSEW 061535
AFDSEW

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SEATTLE WA
835 AM PDT FRI MAY 6 2016

.SYNOPSIS...HIGH PRESSURE ALOFT WILL BUILD OVER THE REGION TODAY
AND SATURDAY PROVIDING SUNSHINE AND NORMAL TEMPERATURES. A TROUGH
WILL INDUCE MUCH COOLER ONSHORE FLOW SATURDAY NIGHT THROUGH MONDAY
WITH SOME DRIZZLE OR SHOWERS POSSIBLE. DRY AND WARMER WEATHER
RETURNS TUESDAY THROUGH THURSDAY.

&&

.SHORT TERM...AN UPPER RIDGE WILL BRING DRY AND WARMER WEATHER
TODAY AND SATURDAY. LOW LEVEL FLOW WILL REMAIN NORTHERLY WHICH
SHOULD LIMIT WARMING A BIT. HIGHS WILL MOSTLY BE IN THE 70S TO
LOWER 80S.

AN UPPER TROUGH WILL PASS TO THE NORTH SATURDAY NIGHT AND SUNDAY.
THIS WILL BRING A FEW SHOWERS AND SOME DRIZZLE BUT THE MAIN
IMPACT WILL BE TO USHER IN MARINE AIR AND COOL HIGHS BACK TO NEAR
NORMAL. MORNING CLOUDS SHOULD GIVE WAY TO PARTIAL AFTERNOON
SUNSHINE SUNDAY. SCHNEIDER

.LONG TERM...PREVIOUS DISCUSSION...STOP ME IF THIS SOUNDS
FAMILIAR...UPPER LEVEL RIDGING OVER THE PACIFIC WILL START TO
BUILD INTO THE AREA FOR THE FIRST HALF OF NEXT WEEK...LEADING TO
TEMPERATURES ABOVE SEASONAL NORMALS. TUESDAY SEES A DRAMATIC JUMP
IN TEMPS BACK INTO THE MID 70S IN LOWLAND LOCATIONS WITH HIGHS
WEDNESDAY AND THURSDAY PROGGED FOR LOWER 80S IN MANY LOCATIONS.
SOME SLIGHT COOLING IS POSSIBLE FOR LATE NEXT WEEK AS AN UPPER
LEVEL LOW OVER ALBERTA PUSHES BACK AGAINST THE RIDGE AND EXERTING
A WEAK INFLUENCE OVER THE AREA. NOT ENOUGH FOR ANY PRECIP...BUT
SHAVING OFF A FEW DEGREES FROM FORECAST HIGH TEMPS AT THAT POINT
WOULD CERTAINLY BE WELCOME. SMR

&&

.AVIATION...AN UPPER LEVEL HIGH PRESSURE RIDGE BUILDS OVER THE AREA
TODAY AND TONIGHT. DRY AND STABLE NORTHEASTERLY FLOW ALOFT ACROSS
WESTERN WA. MARINE MOISTURE AND ISOLATED FOG CONFINED ALONG THE
COAST AND CURRENTLY AT KHQM WILL DISSIPATE BY 18Z. SIMILAR
CONDITIONS PERSIST MOST OF SATURDAY. A STRONG MARINE PUSH SATURDAY
NIGHT WILL BRING STATUS INTO THE WRN WA LOWLANDS ALONG WITH AREAS OF
DRIZZLE.

KSEA...NORTH WIND 6-12 KT RISING TO 8-16 KT THIS AFTERNOON...EASING
TO NORTHEAST 6-12 KT AGAIN AFTER SUNSET. JUST A FEW HIGH CLOUDS
ABOVE 20K FT. THE PATTERN REPEATS SATURDAY. LOOKING AHEAD...AN
ONSHORE PUSH DEVELOPS SATURDAY NIGHT INTO SUNDAY WITH AREAS OF
DRIZZLE AFTER MIDNIGHT INTO SUNDAY MORNING. DTM

&&

.MARINE...NO REAL CHANGE TO THE MARINE FORECAST THIS MORNING.
NORTHWEST ONSHORE FLOW WILL PERSIST TODAY AND TONIGHT...WITH HIGH
PRESSURE WELL OFFSHORE AND LOWER PRESSURE EAST OF THE CASCADES.
NORTHWEST SMALL CRAFT ADVISORY WINDS WILL CONTINUE OVER THE COASTAL
WATERS. SMALL CRAFT ADVISORY NORTHERLIES SHOULD DEVELOP IN THE PUGET
SOUND THIS AFTERNOON AND CONTINUE THROUGH SUNSET...WITH SMALL CRAFT
ADVISORY WESTERLIES IN THE CENTRAL AND EASTERN STRAIT OF JUAN DE
FUCA THIS EVENING.

ONSHORE FLOW WILL STRENGTHEN SATURDAY AND SATURDAY NIGHT AS A
STRONG MARINE PUSH DEVELOPS. WESTERLY GALES ARE LIKELY IN THE
CENTRAL STRAIT OF JUAN DE FUCA AND EAST ENTRANCE STRAIT LATE
SATURDAY THROUGH SATURDAY NIGHT. A GALE WATCH REMAINS IN
EFFECT...WITH A FORECAST OF 30 TO 40 KT WINDS. SMALL CRAFT ADVISORY
WINDS ARE LIKELY ALL OTHER MARINE ZONES EXCEPT PUGET SOUND AND HOOD
CANAL.

ONSHORE FLOW SHOULD DIMINISH SLIGHTLY ON SUNDAY...THEN EASE MORE
SIGNIFICANTLY MONDAY AND TUESDAY. DTM/MCDONNAL

&&

.SEW WATCHES/WARNINGS/ADVISORIES...
WA...NONE.
PZ...SMALL CRAFT ADVISORY UNTIL 6 PM PDT SATURDAY FOR COASTAL WATERS
     FROM CAPE FLATTERY TO JAMES ISLAND 10 TO 60 NM-COASTAL
     WATERS FROM CAPE FLATTERY TO JAMES ISLAND OUT 10 NM-COASTAL
     WATERS FROM JAMES ISLAND TO POINT GRENVILLE 10 TO 60 NM-
     COASTAL WATERS FROM JAMES ISLAND TO POINT GRENVILLE OUT 10
     NM-COASTAL WATERS FROM POINT GRENVILLE TO CAPE SHOALWATER
     10 TO 60 NM-COASTAL WATERS FROM POINT GRENVILLE TO CAPE
     SHOALWATER OUT 10 NM.

     GALE WATCH FROM SATURDAY AFTERNOON THROUGH LATE SATURDAY NIGHT
     FOR CENTRAL U.S. WATERS STRAIT OF JUAN DE FUCA-EAST
     ENTRANCE U.S. WATERS STRAIT OF JUAN DE FUCA.

     SMALL CRAFT ADVISORY FROM 6 PM THIS EVENING TO MIDNIGHT PDT
     TONIGHT FOR CENTRAL U.S. WATERS STRAIT OF JUAN DE FUCA-EAST
     ENTRANCE U.S. WATERS STRAIT OF JUAN DE FUCA.

     SMALL CRAFT ADVISORY FROM NOON TODAY TO 9 PM PDT THIS EVENING
     FOR PUGET SOUND AND HOOD CANAL.

&&

$$

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