Area Forecast Discussion
Issued by NWS Pago Pago

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000
FXZS60 NSTU 310057
AFDPPG

NARRATIVE SYNOPTIC DISCUSSION FOR AMERICAN SAMOA AND THE
INDEPENDENT STATE OF SAMOA
NATIONAL WEATHER SERVICE PAGO PAGO AS
200 PM SST THUR JULY 30 2015

.SHORT TERM...
.TONIGHT THROUGH SATURDAY NIGHT...SATELITE IMAGERIES ARE SHOWING EXTENSIVE
CLOUDINESS ACROSS THE ISLANDS ASSOCIATED WITH A STATIONARY TROUGH/CONVERGENCE
ZONE JUST NORTH OF THE ISLANDS.  MODELS ARE HOLDING THE TROUGH NEARLY STATIONARY
OVER THE ISLAND THROUGH MONDAY BEFORE PUSHING IT NORTHWARD AGAIN NEXT WEEK. A
BROAD AREA OF HIGH PRESSURE NEAR NEW ZEALAND WITH A RIDGE NORTHEASTWARD WILL
CONTINUE TO MOVE EASTWARD THROUGH NEXT WEEK.
THE 31/00Z RAOB INDICATED AN UNSTABLE ATMOSPHERE. THEREFORE...EXPECT SCATTERED TO
NUMEROUS SHOWERS TO DEVELOP ACROSS THE ISLAND TONIGHT THROUGH SATURDAY NIGHT.
EAST WINDS 15 TO 20 MPH WITH HIGHER GUSTS IN SHOWERS WILL PERSIST THROUGH THE FORECAST PERIOD.

&&

.LONG TERM...
.SUNDAY THROUGH THURSDAY...THE MODELS KEPT THE TROUGH/CONVERGENCE ZONE STATIONARY
OVER THE ISLANDS THROUGH TUESDAY THAN MOVE IT NORTHWARD FOR THE REST OF THE WEEK.
THE HIGH PRESSURE FAR SOUTHWEST CONTINUES TO BUILD EASTWARD...THUS TIGHTENING UP
THE PRESSURE GRADIENT AND WILL SEE TRADES TO INCREASE FROM 20 TO 30 MPH BY MID WEEK.
THEREFORE...EXPECT CLOUDY WITH NUMEROUS SHOWERS IN THE BEGINING OF THE WEEK WITH TRADE OF 15 TO
20 MPH THROUGH TUESDAY.  MOSTLY CLOUDY WITH ISOLATED SHOWERS WEDNESDAY AND THURSDAY
WITH TRADES OF 20 TO 30 MPH.

&&

.MARINE...COMBINED SEAS OF 9 TO 12 FEET WILL PERSIST THROUGH TUESDAY BUILDING TO
10 TO 14 FT BY MID WEEK.

.PPG WATCHES/WARNINGS/ADVISORIES...
HIGH SURF ADVISORY REMAINS IN EFFECT
SMALL CRAFT ADVISORY REMAINS IN EFFECT

$$

AKAPO


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