Area Forecast Discussion
Issued by NWS Pago Pago

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FXZS60 NSTU 260153
AFDPPG

AREA FORECAST DISCUSSION FOR AMERICAN SAMOA AND INDEPENDENT SAMOA
NATIONAL WEATHER SERVICE PAGO PAGO AS
253 PM SST TUE APR 25 2017

.SHORT TERM...
.TONIGHT THROUGH THURSDAY NIGHT...SCATTERED SHOWERS AND POSSIBLE
TSTMS ARE EXPECTED. A SURFACE TO MID-LEVEL TROUGH OVER THE SAMOAN
ISLANDS WILL CONTINUE TO MIGRATE WSW THROUGH WEDNESDAY. THIS TROUGH
WILL REMAIN STATIONARY NEAR SW OF SAVAII AND UPOLU THROUGH THURSDAY
AFTERNOON. INTERESTINGLY...A SURFACE TO MID-LEVEL RIDGE FROM THE
EAST OF MANU`A WILL EITHER STAY OR GET PUSHED AWAY BY THIS
EXPECTED TROUGH. POSSIBLE INCREASING WEATHER ACTIVITY WILL LINGER
OVER THE AREA BUT FOR NOW...ANTICIPATE LIGHT TO MODERATE NORTHEAST
WINDS BUT VARIABLE AT TIMES...AND ISOLATED TO SCATTERED SHOWERS TO
PASS THROUGH THE REGION.

.LONG TERM...
.FRIDAY THROUGH TUESDAY...A SURFACE TROUGH NEAR SW OF SAVAII AND
UPOLU WILL EVENTUALLY SLIDE SW AFTER SATURDAY AFTERNOON. A BROAD
AREA OF HIGH PRESSURE WILL ASCEND OVER THE REGION THUS ALLOWING
GENTLE TO MODERATE EASTERLIES TO RETURN AT LEAST BY TUESDAY. FOR
NOW...WILL KEEP THE PREV FCST THE SAME. EXPECT ISOLATED TO
SCATTERED SHOWERS AND LIGHT AND VARIABLE WINDS UP TO 10 KT THROUGH
LONG TERM.

&&

.MARINE...THE LATEST PACIOOS BUOY REPORTS LONG PERIODS UP TO 13 TO
16 SECONDS WITH WAVE HEIGHTS RANGING FROM 6 TO 8 FT. THE FNMOC
WAVE WATCH III SHOWS 5 TO 7 FT WAVE HEIGHT AFTER TONIGHT BUT DUE
TO A STRONG GALE LOW NORTHEAST OF NEW ZEALAND...LONG PERIOD SSE
SWELLS WILL CONTINUE TO APPROACH THE SAMOAN COASTAL WATERS PAST
THURSDAY NIGHT. THEREFORE...WILL MAINTAIN ADVISORIES FOR SMALL
CRAFTS AND HIGH SURFS OVER THE NEXT COUPLE OF DAYS.

&&

.PPG WATCHES/WARNINGS/ADVISORIES...

.A SMALL CRAFT ADVISORY REMAINS IN EFFECT.

.A HIGH SURF ADVSIORY REMAINS IN EFFECT UNTIL 3 PM SST FRIDAY.

&&

$$

CB






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