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251
FXZS60 NSTU 210113
AFDPPG

AREA FORECAST DISCUSSION FOR AMERICAN SAMOA AND INDEPENDENT SAMOA
NATIONAL WEATHER SERVICE PAGO PAGO AS
213 PM SST WED AUG 20 2014

.SHORT TERM...
.TONIGHT THROUGH FRIDAY NIGHT...AN ORGANIZED LINE OF CLOUDS AND
SCATTERED SHOWERS EMBEDDED WITHIN THE TRADE-WIND FLOW WILL CONTINUE
TO MOVE WESTWARD TONIGHT MAINLY ALONG THE SOUTH-FACING BORDERS OF
THE FCST ZONES. A STRONG HIGH PRESSURE SYSTEM NEAR NEW ZEALAND
WILL INTENSIFY DURING THE SHORT-TERM FCST PERIOD THUS ALLOWING
SCATTERED TO NUMEROUS SHOWERS TO MOVE OVER SAVAII EASTWARD STARTING
THURSDAY NIGHT INTO FRIDAY. A WET SPELL WILL RETURN AS A DEVELOPING
SURFACE TROUGH RIDES ALONG THE TRADE-WIND FLOW. THEREFORE...ANTICIPATE
DRIER WEATHER OVER AMERICAN SAMOA WITH MINIMAL SHOWER COVERAGE
DURING THURSDAY...BEFORE SCATTERED SHOWERS ENTER TUTUILA EASTWARD
DURING FRIDAY. AS FOR UPOLU AND SAVAII...ANTICIPATE MOSTLY CLOUDY
SKIES AND SCATTERED TO NUMEROUS SHOWERS DURING THE NEXT COUPLE OF
DAYS. EXPECT MODERATE TRADE-WINDS TO PERSIST ACROSS THE AREA.

.LONG TERM...
.SATURDAY THROUGH WEDNESDAY...A TRADE-WIND REGIME WILL USHER
MODERATE TO FRESH TRADE-WINDS AND SCATTERED SHOWERS ACROSS THE
AREA. A LARGE SCALE HIGH PRESSURE SYSTEM WELL SOUTHWEST OF SAMOA WILL
STALL NEAR NEW ZEALAND THUS THE NORTHERN EDGE OF THE HIGH PRESSURE
AREA WILL SWEEP WET WEATHER CONDITIONS OVER THE SAMOAN ISLANDS
INTO THE MIDWEEK. AS A RESULT...ANTICIPATE SCATTERED TO OVERCAST
CLOUD COVERAGE AND ISOLATED TO SCATTERED SHOWERS DURING THE NEXT
SEVERAL DAYS.

&&

.MARINE...LARGE TRADE-WIND GENERATED SEAS AND SWELLS OF 7 TO 9 FEET
WILL SUBSIDE TO 5 TO 7 FEET TONIGHT NEAR UPOLU AND SAVAII...AND
THIS TREND WILL RUN ACROSS AMERICAN SAMOA WATERS TONIGHT INTO THURSDAY
MORNING. A NEW TRADE-WIND GENERATED SWELLS OF 7 TO 9 FEET PEAKING
TO NEAR 11 FEET ARE EXPECTED TO ARRIVE SATURDAY EVENING. THIS WILL
TRIGGER ISSUANCE OF A SMALL CRAFT AND HIGH SURF ADVISORIES SATURDAY
NIGHT. STRONG AND HAZARDOUS SURFS ARE POSSIBLE DURING THE NEW WEEK
AS A HIGH PRESSURE SYSTEM WELL SOUTHWEST STALLS NEAR NEW ZEALAND.

&&

.PPG WATCHES/WARNINGS/ADVISORIES...
.A SMALL CRAFT ADVISORY.
.A HIGH SURF ADVISORY.

&&

$$

BAQUI






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