Synoptic discussion for American Samoa.

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FXZS60 NSTU 130103
AFDPPG

Area Forecast Discussion
National Weather Service Pago Pago AS
203 PM SST Thu Nov 12 2026

.Short term...
TONIGHT THROUGH SATURDAY NIGHT...Satellite shows low level
moisture slowly moving northwest west from the territory. Also, a
low pressure developing far northeast from Tutuila about 980 miles
will continue to build in that area. RAOB from the afternoon
depicts a saturated low level. The high pressure to the southeast
will remain stationary and pushes the moisture west during the
weekend. As the low level moisture exit the territory on Saturday,
trades will diminish to breezy flow and showers decreasing to
isolated conditions.

.Long term...
SUNDAY THROUGH THURSDAY...Strong shear will remain over the
islands for the new week. This will decline the development of the
low pressure as it migrates westward. However, trades will again
increase to strong flow on Sunday night before reaching near gale
on Monday night. As the low pressure slowly dissipate, trades will
diminish to strong flow on Wednesday. Showers are expected to
increase to numerous on Monday and Monday night. Another episode
of increasing showers will move across the islands on Thursday.

&&

.Marine...
Hazardous seas of 9 to 12 feet will persist tonight through Friday
night. As trades slightly diminish, seas will subside 7 to 9 feet
on Saturday. With the increase of the pressure gradient from the
developing low and the high pressure, trades will increase to
strong flow and seas will build 9 to 12 feet on Sunday night. As
the low moves north of the territory, winds will again increase to
near gale flow on Monday night and seas will build 12 to 14 feet
through Tuesday night. The low pressure will slowly dissipate and
the pressure gradient decreasing on Wednesday. Trades will
diminish to strong flow through Thursday. Seas will persist at 9
to 12 feet through Thursday.

&&

.PPG WATCHES/WARNINGS/ADVISORIES...
High Surf Advisory remains in effect
Small Craft Advisory remains in effect

&&

$$