Area Forecast Discussion
Issued by NWS Pago Pago

Home | Current Version | Previous Version | Text Only | Print | Product List | Glossary On
Versions: 1 2 3 4 5 6 7
000
FXZS60 NSTU 210124
AFDPPG

AREA FORECAST DISCUSSION FOR AMERICAN SAMOA AND INDEPENDENT SAMOA
NATIONAL WEATHER SERVICE PAGO PAGO AS
224 PM SST SAT DEC 20 2014

.SHORT TERM...
.TONIGHT THROUGH MONDAY NIGHT...THE REGIONAL SERVICES METEOROLOGICAL
CENTER (RSMC) IN FIJI ANALYZED A TROPICAL DISTURBANCE 03F CENTERED
NEAR 13.2S 170W AT 202100 UTC OR 10 AM SST SATURDAY. THE ASCAT FROM
THIS MORNING MISSED THE SWATH OVER THE SAMOAN ISLANDS HENCE THE
LATEST DATA SHOWS STRONG NORTHWESTERLY WINDS UPSTREAM. THESE STRONG
WINDS ARE ASSOCIATED WITH DEVELOPING CONVECTION AND TSTMS OCCURRING
IN AN AREA FROM LATITUDE 166W TO 168W BETWEEN LONGITUDE 10S AND
12S. COMPUTER MODELS TRACKED THE MOVEMENT OF THE TROPICAL DISTURBANCE
EAST-SOUTHEAST TOWARD THE COOK ISLANDS OVER THE NEXT 24 TO 48 HOURS.
GALE FORCE WINDS ARE EXPECTED TO REMAIN WELL NORTHEAST AND EAST OF
THE SAMOAN ISLANDS. THE MAIN CONCERNS FOR WEATHER OVER THE REGION
ARE GUSTY TRADE-WINDS AND SHOWER COVERAGE. THE MONSOONAL TROUGH AXIS
OVER THE SAMOAN ISLANDS WILL ENHANCE NUMEROUS SHOWERS THROUGH SUNDAY
NIGHT THEN DIMINISHING MONDAY AFTERNOON. THE LARGE SCALE AREA OF
HIGH PRESSURE TO THE SOUTH WILL SWEPT MODERATE TO FRESH TRADE-WINDS
ACROSS THE FCST ZONES THROUGH THE SHORT-TERM FCST PERIOD. AS A
RESULT...ANTICIPATE A WET FCST PERIOD UNTIL MONDAY NIGHT.

.LONG TERM...
.TUESDAY THROUGH SATURDAY....A STRONG HIGH PRESSURE SYSTEM TO THE
SOUTH WILL USHER MODERATE TO FRESH TRADES ACROSS THE AREA. A MONSOONAL
TROUGH IS EXPECTED TO REMAIN NEAR TOKELAU ISLANDS THROUGHOUT THE
LONG TERM FCST PERIOD. THEREFORE...ANTICIPATE PARTLY TO MOSTLY
CLOUDY SKIES AND MINIMAL SHOWERS THROUGH THE CHRISTMAS HOLIDAY.

&&

.MARINE...COMBINED SEAS OF 8 TO 10 FEET WILL PERSIST OVER THE NEXT
SEVERAL DAYS.

&&

.PPG WATCHES/WARNINGS/ADVISORIES...
.A SMALL CRAFT ADVISORY.
.A HIGH SURF ADVISORY.
.A FLASH FLOOD WATCH EXTENDED MONDAY AFTERNOON.

&&

$$

BAQUI





USA.gov is the U.S. government's official web portal to all federal, state and local government web resources and services.