852
FXZS60 NSTU 100311
AFDPPG

Area Forecast Discussion
National Weather Service Pago Pago AS
411 PM SST Thu Apr 9 2026

.Marine Update...Seas rapidly built at Poloa buoy with the
arrival of the swell, peaking at 8.4 feet 2 PM this afternoon.
With peak period times exceeding 12 seconds and average period
times exceeding 10 seconds, ocean conditions are favorable for
large breaking waves (surf) and dangerous rip currents.
Advisories have now been issued for High Surf and Small Craft.
The High Surf Advisory is in effect for south, east, and west
facing shorelines at this time. Model data indicates a
southeasterly swell. However, the buoy observed primary direction
of the swell has been out of the southwest at times. The advisory
may be updated to only include south and east facing shorelines
in the future if this changes. With this latest data coming in
after initial afternoon forecast issuance, forecasts have now
been amended with the increase in wave heights for tonight and
new advisories now in place. Otherwise, the forecast for tomorrow
onwards remains the same.

&&

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

$$

Barton

&&

.Previous discussion... /issued 236 PM SST Thu Apr 9 2026/

Short term...

Satellite imagery over the American Samoa islands has shown mostly
a mix of sun and clouds over the area, but some locations had
passing showers throughout the morning and early afternoon. Partly
cloudy skies and the possibility of passing showers remain through
the overnight hours with light easterly winds.

A trough currently to the southeast of American Samoa contains
showers and thunderstorms. Even though the trough is forecast to
move over the area on Friday and Friday night, it is expected to
weaken as it begins to become unorganized due to another trough to
the southwest. Numerous showers (60% chance) is forecast during
this time with easterly winds reaching up to 15 mph.

As the aforementioned through moves away from the area on
Saturday and Saturday night, the risk of showers reduces to
scattered showers (40% chance) with a mix of sun and clouds
throughout the day. Winds remain easterly up to 15 mph.

Long term...

For the second half of the weekend and Monday, another trough is
anticipated to move over the American Samoa islands. The risk of
showers increases to numerous showers, but severe weather is not
anticipated. As the trough moves away on Monday evening, benign
weather conditions are currently forecast for the rest of the week
leading into Flag Day.

Marine...

Current data from both PacIOOS buoys to the west of Tutuila and to
the east of Aunu`u shows ideal sea conditions over the American
Samoa coastal waters. However, a long period southerly swell is
forecast to move through the American Samoa coastal waters
overnight tonight. Seas are expected to build and peak on Friday
around 8 to 10 feet and remain elevated through the weekend. The
long period swell is to be strong enough to produce elevated surf
along the southern and eastern shores to High Surf Advisory
levels. Easterly winds are to be at or below 15 knots throughout
this time. By Monday night, seas are to ease and ideal sea
conditions are forecast for the rest of the week.

&&

$$

LaPlante