Area Forecast Discussion
Issued by NWS Pago Pago

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FXZS60 NSTU 190023

Area Forecast Discussion
National Weather Service Pago Pago  AS
123 PM SST Fri Aug 18 2017

.Short term...
TONIGHT THROUGH SUNDAY NIGHT...Current model data show a surface
ridge dominating weather conditions across the forecast area
through Saturday. Moisture from a trough far East are expected to
move across the territory Saturday night as this bulk of moisture
is caught within the easterly flow. Hence, we will maintain
previous forecast, with fair weather tonight through Saturday,
then an upward trend in clouds and showers Saturday night through
Sunday. Moderate to fresh easterlies will still prevail across the
area as the associated high pressure to the Southeast continues
to move East.

.Long term...
MONDAY THROUGH FRIDAY...Latest models show another high pressure
system near New Zealand building and moving eastward through the
long term. This building high pressure will maintain easterlies
across the area through the long term. Hence, will maintain previous
forecast for the territory.


Current Wave Watch III/SWAN model shows seas remaining above
thresholds through the weekend. This coincides with the moderate
to fresh easterlies forecast to prevail across the area through
the weekend. The models suggest a subsiding trend by Monday, but
will continue to monitor future models as the winds are still
expected to satisfy advisory thresholds through the new week.


High Surf Advisory remains in effect
Small Craft Advisory remains in effect



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