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 8 9 10 11
000
FXZS60 NSTU 190053
AFDPPG

AREA FORECAST DISCUSSION FOR AMERICAN SAMOA AND INDEPENDENT SAMOA
NATIONAL WEATHER SERVICE PAGO PAGO AS
153 PM SST WED JAN 18 2017

.SHORT TERM...
.TONIGHT THROUGH FRIDAY NIGHT...NUMEROUS SHOWERS AND ISOLATED
TSTMS ARE EXPECTED STARTING TONIGHT INTO THURSDAY NIGHT. THOUGH A
SURFACE TO MID-LEVEL TROUGH REMAINS OVER 300 MILES SW OF TUTUILA...GFS
SWEEPS A LOT OF RAINFALL ACTIVITY ACROSS SAVAII EASTWARD LATE TONIGHT
INTO THURSDAY AFTERNOON. THIS WILL BE THE MAIN WEATHER PRODUCER
FOR THE REGION AS THIS EXPECTED TROUGH STALLS NEAR SAVAII AND
UPOLU INTO FRIDAY NIGHT.

.LONG TERM...
.SATURDAY THROUGH WEDNESDAY...A MONSOONAL TROUGH WILL REMAIN CLOSE
TO THE SAMOAN ISLANDS UNTIL IT DRIFTS NORTHWARD SUNDAY NIGHT. GFS
STRUGGLES TO MAINTAIN THE LOCATION OF THE EXPECTED TROUGH OVER THE
NEXT SEVERAL DAYS. PERHAPS WILL KEEP A CLOSE EYE ON THIS SITUATION
AS IT/S TOO EARLY TO COMMENT ON IT. FOR NOW...WILL KEEP THE PREV
FCST THE SAME.

&&

.MARINE...FNMOC WW3 SHOWS LONG PERIOD OF 12 TO 15 SEC FROM THE SW
WILL PASS THROUGH THE AREA UNTIL THURSDAY NIGHT...FOLLOWED BY A NW
SWELL UP TO 13 TO 18 SEC ARRIVING FRIDAY INTO SATURDAY NIGHT. THIS
SWELL EPISODE WILL TRIGGER SEAS AND SURFS TO REACH ADVISORY THRESHOLDS
OVER THE NEXT COUPLE DAYS. WILL MONITOR SEAS AND SURF HEIGHTS TO
VERIFY MODEL SOLUTIONS BEFORE ISSUING AN ADVISORY FOR HIGH SURFS.

&&

.PPG WATCHES/WARNINGS/ADVISORIES...

A FLASH FLOOD WATCH IN EFFECT THROUGH THURSDAY NIGHT.

&&

$$

CB





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