Area Forecast Discussion
Issued by NWS Pago Pago

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FXZS60 NSTU 230116
AFDPPG

AREA FORECAST DISCUSSION FOR AMERICAN SAMOA AND INDEPENDENT SAMOA
NATIONAL WEATHER SERVICE PAGO PAGO AS
216 PM SST THU JUN 22 2017

.SHORT TERM...
TONIGHT THROUGH SATURDAY NIGHT...AN ACTIVE SURFACE TROUGH OVER THE
ISLANDS WILL CONTINUE TO PRODUCE NUMEROUS SHOWERS AND BREEZY EAST
WINDS THROUGH FRIDAY NIGHT. SATELLITE SHOWS DEEP CONVECTIONS
MATERIALIZING SLIGHTLY SOUTH OF UPOLU. ON THE ASCAT SWATH FROM
THIS MORNING...THE SURFACE TROUGH AXIS WAS POSITIONED OVER UPOLU.
NEW MODEL RUNS HAVE THE RIDGE TO THE SOUTH MIGRATE EASTWARD WHILE
THE ACTIVE SURFACE TROUGH CONTINUE TO MATERIALIZE AS IT SLOWLY
PASSES OVER THE ISLANDS. THEREFORE...BREEZY AND GUSTY EAST WINDS
WILL PERSIST TONIGHT BEFORE DIMINISHING TO GENTLE EAST WINDS ON
SATURDAY AFTERNOON. NUMEROUS SHOWERS AND ISOLATED THUNDERSTORMS
WILL REMAIN ACROSS THE TERRITORY THROUGH FRIDAY NIGHT THEN SLOWLY
DISSIPATE ON SATURDAY MORNING.

.LONG TERM...
SUNDAY THROUGH THURSDAY...A WEAK HIGH PRESSURE FROM THE SOUTHWEST
WILL MAINTAIN ISOLATED SHOWERS AND GENTLE WINDS DURING THE NEW
WEEK. A JET STREAK SOUTH OF TONGA WILL MAINTAIN MINIMUM SHOWERS.
THEREFORE EXPECT ISOLATED SHOWERS AND GENTLE EAST WINDS DURING THE
REST OF THE FORECAST.

&&

.MARINE...LARGE TRADEWIND GENERATED SEAS COMBINED WITH KING TIDES
THIS COMING FRIDAY AND SATURDAY MORNINGS WILL MAINTAIN HAZARDOUS
SEAS AND SURFS. LARGE SEAS OF 9 TO 12 FT WILL SUBSIDE 7 TO 9 FT
ON FRIDAY MORNING...THEN GRADUALLY SUBSIDE TO NEAR 5 TO 7 FT
FRIDAY NIGHT INTO SATURDAY MORNING. HOWEVER...KING TIDES ARE
EXPECTED TO REACH UP TO 3.5 FT FOR TUTUILA...AND UP TO 5 FT FOR
TA`U MANU`A AROUND 6 AM TO 7:30 AM LOCAL TIME FRIDAY AND
SATURDAY. LOCAL MARINERS AND COMMUNITY ARE STRONGLY CAUTIONED TO
MONITOR LOCAL SURROUNDING EARLY FRIDAY AND SATURDAY.
HENCE...ISSUANCE OF ADVISORIES FOR SMALL CRAFTS AND HIGH SURFS
WILL REMAIN IN EFFECT THROUGH FRIDAY.


&&

.PPG WATCHES/WARNINGS/ADVISORIES...
FLASH FLOOD WATCH REMAINS IN EFFECT UNTIL FRIDAY NIGHT.
HIGH SURF ADVISORY REMAINS IN EFFECT.
SMALL CRAFT ADVISORY REMAINS IN EFFECT.

&&

$$

MALALA






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