American Samoa's Tropical Cyclone Outlook 2025-26

Below Normal to Near Normal Tropical Cyclone (TC) Activity anticipated for American Samoa in the 2025-26 TC Season Read More >

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FXZS60 NSTU 190055
AFDPPG

Area Forecast Discussion
National Weather Service Pago Pago AS
155 PM SST Sun Jan 18 2026

.Discussion...
Latest satellite data shows convective clouds over the area as a
weak trough develops at the boundary of the ridge of high pressure
mentioned in yesterday`s discussion. Current model trends have
slightly weakened the high pressure, while enhancing shower
activity due to the trough. The upper air sounding from this
afternoon confirms an unstable and moist environment, which could
lead to minor flooding with a slight chance for thunderstorm
development. Expect these conditions to persist through Thursday
before becoming widespread Thursday night as the trough deepens.
Winds are expected to be light and variable through the forecast
period.

&&

.Marine...
Current wave heights have slightly elevated to 5 to 7 feet as
north and south swells are observed at the PacIOOS buoys. However,
seas remain fairly calm due to a gentle breeze. Calm ocean
conditions is expected to hold through Thursday, then gradually
build over the weekend as strong winds develop to the north of the
territory.

&&

.PPG WATCHES/WARNINGS/ADVISORIES...
None

&&

$$

TM