Red Flag Warning 6, NWS Seattle, WA

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SEATTLE WA
330 AM PDT FRI SEP 5 2014

.SYNOPSIS...HIGH PRESSURE WILL BRING SUNNY AND WARMER WEATHER
THROUGH THE WEEKEND. CLOUDS AND COOLER WEATHER WILL BRIEFLY RETURN
EARLY NEXT WEEK AS AN UPPER TROUGH MOVES OVER THE AREA. HIGH
PRESSURE WILL REBUILD OVER THE AREA LATER NEXT WEEK FOR MORE SUNNY
AND WARM WEATHER.

&&

.SHORT TERM...HIGH PRES ALOFT COMBINED WITH LOW LEVEL OFFSHORE FLOW
WILL BRING DRY AND STABLE WEATHER TO WESTERN WASHINGTON TODAY
THROUGH THE WEEKEND.

EXPECT ABOVE NORMAL TEMPERATURES TODAY AND SAT WITH HIGHS IN THE
80S...EVEN ALONG THE COAST. A FEW LOW 90S ARE POSSIBLE TOO. IT WILL
BE A BIT COOLER ALONG THE STRAIT OF JUAN DE FUCA AND SAN JUANS WITH
HIGHS MAINLY IN THE 70S. SKIES WILL REMAIN CLEAR WITH N/NE WINDS.
TEMPS WILL BE A FEW DEGREES WARMER ON SAT WITH ANOTHER ROUND OF 80S
TO LOW 90S FORECAST...CLOSE TO MAX T RECORDS FOR THE DAY.

THE INVERTED SURFACE TROUGH WILL SHIFT INLAND ON SUN...THEN MOVE
EAST OF THE CREST SUN NIGHT. THIS WILL BRING A WEAK ONSHORE PUSH
WHICH WILL COOL THE COAST BACK DOWN INTO THE 60S. THE INTERIOR
HOWEVER WILL LIKELY SEE ANOTHER DAY IN THE LOW TO MID 80S ON SUN.

A WEAK COLD FRONT WILL CROSS WESTERN WA ON MON WHICH WILL INCREASE
ONSHORE FLOW. THIS WILL BRING MARINE AIR INLAND FOR COOLER AND
CLOUDIER WEATHER. A WEAK UPPER LEVEL TROUGH MAY GENERATE A FEW LIGHT
SHOWERS ACROSS THE AREA. 33

.LONG TERM...COOL ONSHORE FLOW WILL CONTINUE ON TUE WITH
TEMPERATURES TRENDING CLOSE TO NORMAL. A WEAK UPPER LEVEL
DISTURBANCE WILL CLIP THROUGH B.C. WHICH MAY BRING ISOLATED SHOWERS
TO WESTERN WA. DRY AND STABLE WEATHER WILL RETURN BY MIDWEEK AS
ANOTHER UPPER LEVEL RIDGE STARTS TO BUILD IN. FOR NOW IT LOOKS LIKE
THE FORECAST WILL REMAIN DRY THROUGH THE END OF NEXT WEEK AS THIS
RIDGE REMAINS IN PLACE. 33

&&

.AVIATION...A BROAD UPPER LEVEL RIDGE WILL CONTINUE TO BUILD INTO
WESTERN WASHINGTON WITH LIGHT NORTHEAST FLOW ALOFT. THE AIR MASS
WILL REMAIN DRY AND STABLE WITH LOW LEVEL OFFSHORE FLOW CONTINUING
AS THERMALLY INDUCED LOW PRESSURE DEEPENS NEAR THE COAST. DRIER AIR
IN THE LOW LEVELS WILL LIMIT FOG DEVELOPMENT THIS MORNING.

KSEA...VFR CONDITIONS THROUGH THE FORECAST PERIOD. NORTH TO
NORTHEAST WIND 5 TO 10 KNOTS.

&&

.MARINE...SURFACE HIGH PRESSURE WILL REMAIN OVER INTERIOR BRITISH
COLUMBIA WHILE A THERMALLY INDUCED SURFACE TROUGH LIES ALONG THE
OREGON AND WASHINGTON COAST THROUGH SATURDAY. THIS PATTERN WILL
MAINTAIN LOW LEVEL OFFSHORE FLOW THROUGH THE STRAIT...WITH NORTHERLY
FLOW OVER THE INTERIOR AND COASTAL WATERS. EASTERLIES NEAR THE WEST
ENTRANCE TO THE STRAIT MAY APPROACH ADVISORY LEVELS TODAY AND
SATURDAY MORNING. LOW LEVEL FLOW WILL TURN ONSHORE ON SUNDAY...AND
GALE FORCE WEST WINDS IN THE CENTRAL AND EAST STRAIT ON MONDAY ARE A
POSSIBILITY. 27

&&

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

&&

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