Area Forecast Discussion
Issued by NWS Seattle/Tacoma, WA

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000
FXUS66 KSEW 280347
AFDSEW

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SEATTLE WA
845 PM PDT SUN JUL 27 2014

.SYNOPSIS...HIGH PRESSURE ALOFT WILL BRING DRY AND WARM WEATHER THIS
WEEK.

&&

.SHORT TERM...AN UPPER RIDGE...CENTERED OVER THE ROCKIES...WILL KEEP
THE WEATHER DRY AND WARM ACROSS WESTERN WASHINGTON FOR THE NEXT FEW
DAYS. WEAK LOW LEVEL ONSHORE FLOW WILL CONTINUE WITH NORTHWESTERLY
GRADIENTS ACROSS THE AREA. IN GENERAL...DAYS WILL BE MOSTLY SUNNY
WITH HIGHS SEVERAL DEGREES ABOVE NORMAL.

THERE ARE CURRENTLY SOME HIGH CLOUDS FROM SHOWERS TO THE SOUTH
BRUSHING THE FAR EASTERN PART OF THE FORECAST AREA. OTHERWISE SKIES
AREA CLEAR. SIMILAR TO THE LAST COUPLE DAYS...A FEW LOW CLOUD
PATCHES WILL PROBABLY FORM NEAR THE COAST MONDAY MORNING WITH PATCHY
VALLEY FOG OVER THE INTERIOR FOR A COUPLE HOURS AROUND DAYBREAK.

HIGHS WILL BE IN THE 80S MOST AREAS THE NEXT COUPLE DAYS WITH 70S
COAST AND NEAR THE WATER. A DRY AND WEAK UPPER SHORT WAVE IN THE
SOUTHWEST FLOW ALOFT IS EXPECTED TO CAUSE A MINOR INCREASE IN THE
ONSHORE FLOW WEDNESDAY. THIS IN TURN WILL PROBABLY GIVE A FEW
DEGREES OF COOLING BUT HIGHS WILL REMAIN ABOVE NORMAL. SCHNEIDER

.LONG TERM...PREVIOUS DISCUSSION...NO MAJOR CHANGES ARE EXPECTED IN
THE LONG WAVE PATTERN DURING THIS PERIOD. AN UPPER RIDGE WILL
CONTINUE TO DOMINATE THE WEATHER PATTERN OVER MUCH OF THE PACIFIC
NORTHWEST. THE MAIN DIFFERENCES IN THE MEDIUM RANGE SOLUTIONS WERE
IN THE DETAILS. FOR EXAMPLE...THE ECMWF CONTINUED TO ADVERTISE A
WEAK UPPER LOW MOVING ACROSS THE CWA DURING THE FRI NIGHT/SATURDAY
MORNING TIME FRAME. FOR NOW...CHOSE TO COMPROMISE BETWEEN THE ECMWF
AND GFS SOLUTIONS.

&&

.AVIATION...AN UPPER LEVEL RIDGE WILL CONTINUE TO BUILD DOWN STREAM
OVER THE NORTHERN INTERMOUNTAIN AREA THROUGH TUESDAY. THE FLOW ALOFT
WILL REMAIN SOUTHWESTERLY AND LIGHT AND THE AIR MASS WILL REMAIN DRY
AND STABLE. LOW LEVEL ONSHORE FLOW WILL BRING LIMITED LOW CLOUDS AND
OR SHALLOW FOG TO THE NORTH COAST AND STRAIT MONDAY MORNING WITH
CLEARING BY MID TO LATE MORNING. SKIES WILL REMAIN CLEAR AND VFR ALL
OTHER AREAS.

KSEA...CLEAR SKIES AND VFR CONDITIONS THROUGH TONIGHT. NORTHWESTERLY
WINDS 6 TO 12 KTS WILL BECOME NORTHEASTERLY AND WEAKEN SOMEWHAT
AROUND 06Z.

&&

.MARINE...THE PERSISTENT PATTERN OF HIGH PRESSURE OVER THE COASTAL
WATERS AND LOWER PRESSURE INLAND WILL CONTINUE THROUGH MID
WEEK...SUPPORTING VARYING DEGREES ONSHORE FLOW. STRONGEST WINDS WILL
OCCUR THROUGH THE CENTRAL AND EAST STRAIT...LIKELY REACHING SMALL
CRAFT ADVISORY LEVELS DURING THE LATE AFTERNOON AND EVENING HOURS.
IN ADDITION...MODERATE NORTHWESTERLY WINDS OVER THE COASTAL WATERS
WILL PERSIST THROUGH MUCH OF THE WEEK...NEAR OR JUST ABOVE SCA
LEVELS AT TIMES DURING THE AFTERNOON AND EVENING HOURS. AREAS OF
MORNING FOG WILL DEVELOP OVER THE COASTAL WATERS AND STRAIT THROUGH
TUESDAY.

&&

.SEW WATCHES/WARNINGS/ADVISORIES...
WA...NONE.
PZ...SMALL CRAFT ADVISORY COASTAL WATERS AND STRAIT OF JUAN DE FUCA.

&&

$$

WWW.WEATHER.GOV/SEATTLE

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






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