Area Forecast Discussion
Issued by NWS Seattle/Tacoma, WA

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FXUS66 KSEW 252148
AFDSEW

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SEATTLE WA
248 PM PDT FRI JUL 25 2014

.SYNOPSIS...HIGH PRESSURE ALOFT WILL PREVAIL OVER THE AREA THROUGH
EARLY NEXT WEEK FOR DRY AND WARMER WEATHER.

&&

.SHORT TERM...
THERE WAS A NARROW BAND OF SHOWERS ABOUT 95 MILES OFFSHORE. THIS
BAND WILL LIKELY DISSIPATE AS IT MOVES ACROSS THE OUTER COASTAL
WATERS. MEANWHILE...CLOUDS BLANKETED THE COAST THIS AFTERNOON
WHILE ELSEWHERE SKIES WERE GENERALLY PARTLY SUNNY. ANTICIPATE
SOME CLEARING OVER THE CWA DURING THE REST OF THIS AFTERNOON.

AN UPPER RIDGE CENTERED OVER THE DESERT SOUTHWEST WILL DOMINATE
THE WEATHER PATTERN OVER THE PACIFIC NORTHWEST THROUGH MON. THE
RIDGE AXIS WILL REMAIN TO OUR EAST...THEREFORE ANTICIPATE LIGHT
ONSHORE FLOW TO PERSIST. THE MAIN IMPACT THE ONSHORE FLOW WILL
HAVE ON OUR WEATHER WILL BE TO PREVENT TEMPS FROM BECOMING TOO
HOT. AT ANY RATE...LOOK FOR DRY...SUNNIER...AND WARMER WEATHER
DURING THIS PERIOD.

.LONG TERM...
AN UPPER RIDGE WILL DOMINATE THE WEATHER PATTERN OVER THE REGION
DURING THIS PERIOD. THE RIDGE AXIS WILL REMAIN TO OUR EAST...THUS
EXPECT LOW LEVEL ONSHORE FLOW TO PERSIST. THE ONSHORE PRESSURE
GRADIENT MAY STRENGTHEN LATE IN THE PERIOD...LEADING TO MORE
CLOUDS BUT THIS WAS TOO FAR IN THE FUTURE TO BANK ON. ALSO...
THERE IS A CHANCE THAT THERE COULD BE SOME TSTMS OVER THE
CASCADES ON DAY 7...DEPENDING ON WHICH MODEL ONE PREFERS. CHOSE
TO BROAD-BRUSH THE FORECAST BY INDICATING ABOVE NORMAL TEMPS AND
CONFINING LOW CLOUDS TO MAINLY THE COAST.

&&

.AVIATION...WEAK UPPER LEVEL RIDGING AND MODERATE WESTERLY FLOW
ALOFT WILL PERSIST OVER THE REGION TODAY. LOW LEVEL ONSHORE FLOW
WILL REMAIN THROUGH TONIGHT.

THE AIR MASS OVER WESTERN WASHINGTON IS STABLE. AREAS OF LOW LEVEL
MOISTURE REMAINS ALMOST EVERYWHERE EXCEPT OVER SOME OF THE WATER
WAYS OF PUGET SOUND. SCT-BKN CLOUD DECKS 3-5K FT MOST AREAS WILL
PROBABLY REMAIN THROUGH LATE AFTERNOON. THERE WILL BE SOME CLEARING
THIS EVENING BUT THEN EXPECT SOME CLOUD COVER TO RETURN SAT MORNING.
THERE WILL BE SOME MVFR CIGS SAT MORNING BUT THINGS SHOULD CLEAR OUT
FASTER AND MORE COMPLETELY THAN THIS MORNING.

KSEA...SCT-BKN 4K CLOUDS WILL LINGER THIS AFTERNOON BUT SHOULD GO TO
FEW-SCT BY THE EARLY EVENING. OVERNIGHT SHOULD REMAIN FEW-SCT025-040
BUT THERE IS A CHANCE TO BE ON THE EDGE OF BKN015 BY 13Z.

&&

.MARINE...A TYPICAL PATTERN OF HIGH PRESSURE OVER THE COASTAL WATERS
AND LOWER PRESSURE INLAND WILL SUPPORT ONSHORE FLOW THROUGH EARLY
NEXT WEEK. EXPECT STRONGEST WESTERLIES THROUGH THE STRAIT...WITH
SMALL CRAFT ADVISORY LEVEL WINDS POSSIBLE AT TIMES ESPECIALLY DURING
THE LATE AFTERNOON AND EVENING HOURS. AT THIS POINT SCA WINDS ARE
BORDERLINE FOR TONIGHT...MORE LIKELY FOR SAT...AND BORDERLINE AGAIN
ON SUNDAY.

&&

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

&&

$$

WWW.WEATHER.GOV/SEATTLE

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



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