Area Forecast Discussion
Issued by NWS Seattle/Tacoma, WA

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000
FXUS66 KSEW 261035
AFDSEW

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SEATTLE WA
330 AM PDT THU MAR 26 2015

.SYNOPSIS...AN UPPER RIDGE WILL BE OVER THE AREA TODAY FOR DRY
WEATHER. A FRONT WILL BRING RAIN LATER FRIDAY AND FRIDAY NIGHT.
ONSHORE FLOW WILL PREVAIL OVER THE WEEKEND. ANOTHER FRONT WILL
ARRIVE AROUND MONDAY NIGHT.

&&

.SHORT TERM...AN UPPER RIDGE WILL BUILD OVER THE AREA TODAY. THERE
MIGHT BE A FEW LINGERING SPOTS OF RAIN OVER THE CASCADES OR FAR
NORTH PART OF THE FORECAST AREA EARLY. OTHERWISE...TODAY SHOULD BE
DRY AND MILD. HIGHS WILL BE ABOUT 10 DEGREES ABOVE NORMAL WITH 60S
MOST AREAS.

THE UPPER RIDGE WILL SHIFT INLAND TONIGHT AS A FRONT APPROACHES. THE
FRONT WILL BRING RAIN TO THE COAST FRIDAY AFTERNOON...THEN TO THE
INTERIOR IN THE EVENING. RAIN SHOULD CHANGE TO SHOWERS AFTER
MIDNIGHT FRIDAY NIGHT WITH MOST AREAS DRY BY DAYBREAK SATURDAY
BEHIND THE FRONT.

WESTERLY FLOW ALOFT WILL PREVAIL SATURDAY WITH LOW LEVEL ONSHORE
FLOW. MOST OF THE AREA SHOULD BE CLOUDY BUT DRY. SOME SHOWERS WILL
LIKELY LINGER OVER THE CASCADES. THERE WILL ALSO BE AN INCREASING
CHANCE OF RAIN OVER THE COAST...OLYMPICS AND NORTHWEST INTERIOR AS A
WARM FRONT BRUSHES THE NORTHWEST PART OF THE STATE. SCHNEIDER

.LONG TERM...A BROAD UPPER RIDGE WILL BE OVER THE AREA SUNDAY.
MOISTURE COMING OVER THE TOP OF THE RIDGE WILL KEEP A CHANCE OF RAIN
IN THE FORECAST...MAINLY COAST AND NORTH. A FRONT WILL MOVE INTO THE
AREA MONDAY EVENING OR SO FOR ANOTHER SHOT OF RAIN ALL AREAS MONDAY
NIGHT. MODELS ARE IN FAIR AGREEMENT WITH THIS.

RAIN WILL REMAIN LIKELY TUESDAY AS ANOTHER UPPER LEVEL DISTURBANCE
MOVES INTO THE AREA. HIGHS WILL COOL TO NEAR NORMAL TUESDAY BEHIND
THE MONDAY NIGHT FRONT. AN UPPER TROUGH WILL MOVE OVER THE PACIFIC
NORTHWEST ON WEDNESDAY WHICH SHOULD RESULT IN COOL SHOWERY WEATHER.
SCHNEIDER

&&

.HYDROLOGY...FLOODING IS UNLIKELY THE NEXT 7 DAYS.

&&

.AVIATION...THE LAST REMNANT OF RAIN WILL SLIDE NORTH INTO BRITISH
COLUMBIA THIS MORNING LEAVING A MOIST AND STABLE AIR MASS. CEILINGS
WILL REMAIN GENERALLY MVFR THROUGH THE MORNING OVER MUCH OF THE
INTERIOR. LOWER CEILINGS...IFR AND EVEN LIFR...OVER THE COAST AND
SOUTH INTERIOR WILL LINGER THROUGH MID MORNING. WEAK HIGH PRESSURE
WILL BUILD OVER THE REGION TODAY...BRINGING DRY AND STABLE
CONDITIONS THROUGH THIS EVENING. EXPECT CEILINGS ALL AREAS TO LIFT
TO VFR LEVELS BY 18Z...WITH ALL BUT THE COAST SCATTERING OUT DURING
THE AFTERNOON.

KSEA...MVFR CIGS WILL LINGER THROUGH DAY BREAK AND IMPROVE TO VFR BY
17Z. SOUTH WINDS 4 TO 6 KT.

&&

.MARINE...WEAK HIGH PRESSURE WILL BUILD OVER THE AREA TODAY WITH
GENERALLY LIGHT SOUTHERLY WINDS. A COLD FRONT WILL APPROACH THE
COASTAL WATERS FRIDAY AFTERNOON AND MOVE INLAND THROUGH THE EVENING
HOURS. EXPECT INCREASING SOUTHERLY WINDS AHEAD OF THE FRONT OVER THE
COASTAL WATERS FRIDAY AFTERNOON...BECOMING WESTERLY FRIDAY NIGHT.
OVER THE INTERIOR...SOUTHERLIES WILL PICK UP MOST WATERS FRIDAY
EVENING WITH THE STRONGEST WINDS OCCURING WITH THE WESTERLY PUSH
THROUGH THE STRAIT FRIDAY NIGHT...LIKELY REACHING SMALL CRAFT
ADVISORY LEVELS OVER THE CENTRAL AND EAST STRAIT. HIGH PRESSURE WILL
RETURN TO AREA WATERS THROUGH THE WEEKEND.

&&

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

&&

$$

WWW.WEATHER.GOV/SEATTLE

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