852
FXZS60 NSTU 300134
AFDPPG

Area Forecast Discussion
National Weather Service Pago Pago AS
234 PM SST Wed Apr 29 2026

.Short term...

More sun than clouds remained over the American Samoa islands this
morning and early this afternoon. Satellite imagery shows a weak
trough to the north and east with decreasing east/southeasterly
winds will a ridge remains to the south and west of the islands.

A slow moving weather pattern is anticipated for the rest of the
week and this weekend. A high pressure system to the southwest is
to remain centered near the New Zealand region. The ridge is not
anticipated to reach as far north of American Samoa throughout
this time. Therefore, weak east/southeasterlies remain. The trough
is anticipated to remain weak if it moves far enough south to
reach the islands. If showers occur from tonight through early
Friday, however, it would be in the passing form. East/southeasterly
are to become easterly up to 10 mph for Thursday and early
Friday.

.Long term...

The aforementioned trough is finally anticipated to move over the
islands by late Friday and remain through early next week. A low
is anticipated to develop well to the south of American Samoa late
this weekend and into early next week. Even though this low will
not directly impact American Samoa, it may bring additional
moisture from the north and west of the territory over the
islands. The risk of showers increase as the trough strengthens.
If rainfall occurs, it may be heavy enough to produce ponding on
roadways but it is not anticipated to be heavy enough to cause
flash flooding the first half of the weekend. However, we will
monitor the track and strength of the trough as the weather
pattern develops throughout this week to see if conditions would
warrant a Flood Watch. Otherwise, more clouds than sun are
forecast during the day and temperatures are to remain around
average.

We are approaching the last day of hurricane season for American
Samoa. We are not anticipating any development near American Samoa
for the rest of the season.

&&

.Marine...

East/southeasterly winds continued to decrease this morning and
early afternoon as it became a gentle breeze. Therefore, wind
driven seas have eased with only a weak southerly swell moving
through the American Samoa coastal waters. Seas around 5 to 6 feet
are anticipated through the weekend. The easterly breeze
continues to slowly decrease to become light and variable on
Friday and Saturday. Conditions are forecast to be below the Small
Craft and High Surf Advisory levels through the weekend.

&&

.PPG WATCHES/WARNINGS/ADVISORIES...

NONE

&&

$$

LaPlante