Area Forecast Discussion
Issued by NWS Pago Pago

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FXZS60 NSTU 231945 AAA

Area Forecast Discussion...UPDATED
National Weather Service Pago Pago  AS
845 AM SST Mon Oct 23 2017

.Short term...
TONIGHT THROUGH TUESDAY NIGHT...A high pressure system to the
south will dominate weather features through the short term
period. This high pressure will most likely bring in moderate to
fresh tradewinds with embedded showers. Visible imagery shows an
active trough to the north of Swains island producing
thunderstorms and continuous precipitation. However, lines of
clouds from the north and east will descend over the area through
tomorrow, producing scattered to numerous showers with isolated
thunderstorms through the rest of the forecast period.

.Long term...
WEDNESDAY THROUGH SUNDAY...The aforementioned high pressure to
the south will continue to migrate eastward as the week
progresses. A surface trough to the south will move briefly across
the area before dissipating towards the end of the week. Another
broad high pressure to the southwest will move across the area
through the rest of the forecast period. Therefore, expect weather
conditions to change throughout the week.


Wave Watch III model solutions show a downward trend in sea
heights after tomorrow. Combined seas heights of 7 to 9 feet
continue to impact shorelines through tomorrow before subsiding to
5 to 7 feet in the afternoon. PacIOOS also show heights above the
threshold levels. Therefore will keep the advisories for high
surfs and small crafts through tomorrow afternoon.


High surf advisory remains in effect.
Small craft advisory remains in effect.



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