Area Forecast Discussion
Issued by NWS Seattle/Tacoma, WA

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000
FXUS66 KSEW 262241
AFDSEW

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SEATTLE WA
300 PM PST MON JAN 26 2015

.SYNOPSIS...A WEAK COLD FRONT WILL DISSIPATE OVER WESTERN WASHINGTON
TUESDAY. ANOTHER RIDGE WILL MAINTAIN DRY AND MILD WEATHER WEDNESDAY
THROUGH SATURDAY. THE NEXT FRONT BRINGS A CHANCE OF RAIN BACK INTO
THE AREA SUNDAY AND EARLY NEXT WEEK.

&&

.SHORT TERM...THE INTERIOR CLEARED OUT FOR ANOTHER SUNNY AND WARM
DAY WITH HIGHS IN THE 60S. SEATAC HIT 60 DEGREES LAST HOUR WHICH
BREAKS THE OLD RECORD OF 58 SET BACK IN 2003. HOWEVER LOW CLOUDS
LINGERED ALONG THE COAST AND STRAIT THIS AFTERNOON FOR CLOUDY SKIES
AND COOLER CONDITIONS WITH TEMPS IN THE 40S TO LOWER 50S.

THE UPPER LEVEL RIDGE WILL SHIFT EAST TONIGHT AS A WEAK COLD FRONT
ADVANCES OFFSHORE. THIS FRONT WILL BRING MORE CLOUDS AND A FEW
SHOWERS TO WESTERN WA ON TUESDAY. THIS SYSTEM LOOKS PRETTY MEAGER ON
THE IR SATELLITE AND FORECAST QPF AMOUNTS ARE LIGHT...TRACE TO FEW
HUNDREDTHS. THERE WILL BE SOME LINGERING MOISTURE TUE NIGHT WITH
ISOLATED SHOWERS MAINLY IN THE CASCADES.

AN UPPER LEVEL RIDGE WILL BUILD OVER THE REGION ON WEDNESDAY FOR
ANOTHER DRY DAY ACROSS WESTERN WA. POPS WERE LOWERED AND REMOVED
ACROSS THE BOARD. THIS RIDGE LOOKS DIRTY THOUGH WITH PARTLY TO
MOSTLY CLOUDY SKIES EXPECTED. THE RIDGE WILL CONTINUE TO STRENGTHEN
OVERHEAD AS WE MOVE INTO THURSDAY. THE RESULT IS ANOTHER DRY AND
MILD DAY ON TAP...WITH MORE SUNSHINE EXPECTED. 33

.LONG TERM...AN UPPER LEVEL RIDGE WILL CONTINUE TO DOMINATE ACROSS
THE PAC NW FRI AND SAT FOR MORE DRY AND STABLE WEATHER. TEMPERATURES
WILL REMAIN ABOVE NORMAL WITH HIGHS IN THE LOW TO MID 50S EACH DAY.
A WARM FRONT WILL THEN BRING SOME RAIN TO THE AREA ON SUN. THIS WARM
FRONT MAY STALL OVER THE REGION THROUGH MONDAY FOR MORE CLOUDY AND
RAINY WEATHER. 33

&&

.HYDROLOGY...FLOODING IS NOT EXPECTED FOR THE NEXT 7 DAYS.

&&

.AVIATION...AN UPPER LEVEL RIDGE IS CENTERED OVER IDAHO TONIGHT WITH
SOUTHWEST FLOW ALOFT OVER WESTERN WASHINGTON. FLOW WILL TURN MORE
WESTERLY TUESDAY AS A WEAK FRONT OFF THE COAST MOVES ASHORE AND
DISSIPATES. AIR MASS STABLE AND DRY EXCEPT MOIST ON THE COAST AND
OVER THE STRAIT. INCREASING CLOUDS ALL LEVELS TONIGHT AS LIGHT RAIN
DEVELOPS ON THE COAST.

VFR CONDITIONS WILL CONTINUE TONIGHT EXCEPT ON THE COAST WHERE THERE
ARE MVFR CEILINGS. CLOUDS WILL INCREASE TONIGHT AND BY SOMETIME
TUESDAY MVFR CEILINGS WILL BE WIDESPREAD. IN THE MEANTIME SOME FOG
OR STRATUS IS LIKELY TO FORM AGAIN...PROBABLY PATCHES IN THE
SOUTHWEST. THE FOG/STRATUS OVER THE STRAIT WILL CONTINUE THROUGH THE
NIGHT.

KSEA...VFR THROUGH TUESDAY MORNING...THEN THERE IS SOME CHANCE OF
MVFR CEILINGS AS THE FRONT MOVES INLAND AND DISSIPATES. THERE IS AN
OUTSIDE CHANCE A LITTLE FOG COULD OCCUR LATE TONIGHT BUT WILL LEAVE
IT OUT OF THE TAF FOR NOW. SOUTHERLY WIND 6-10 KT. CHB

&&

.MARINE...SMALL CRAFT ADVISORIES REMAIN IN EFFECT ON THE COAST. AN
APPROACHING FRONT IS OVER THE OFFSHORE WATERS AND WILL SLOWLY MOVE
INLAND TONIGHT AND TUESDAY. FOR NOW HAVE LIMITED THE ADVISORY LEVEL
WINDS TO THE COAST AND HAVE 10-20 KT ELSEWHERE. THERE WILL BE A
BRIEF SURGE OF WESTERLY WIND 10-20 KT IN THE STRAIT TONIGHT AND
TUESDAY AFTER THE FRONT PASSES.

OFFSHORE FLOW WILL RESUME WEDNESDAY AND PERSIST THROUGH FRIDAY AT
LEAST. ANOTHER FRONT WILL APPROACH THE AREA ON SATURDAY. CHB

&&

.SEW WATCHES/WARNINGS/ADVISORIES...
WA...NONE.
PZ...SMALL CRAFT ADVISORY COAST.

&&

$$

WWW.WEATHER.GOV/SEATTLE

YOU CAN SEE AN ILLUSTRATED VERSION OF THIS FORECAST DISCUSSION AT
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