Synoptic discussion for American Samoa.

295
FXZS60 NSTU 250058
AFDPPG

Area Forecast Discussion
National Weather Service Pago Pago AS
158 PM SST Mon Mar 24 2025

.Short term...
Latest satellite and surface data show active thunderstorms and
widespread rain over Tutuila, while Manu`a is experiencing minimal
showers with no thunderstorms. This difference in weather over the
two Islands reflects the movement of thunderstorms from east to
west, following the east trade wind flow. Additionally, these
thunderstorms have caused flash flooding on Tutuila within the
past few hours. By this evening, the thunderstorms are expected
to move further west, reducing the potential for flooding later
tonight through Tuesday. Breezy winds will also diminish as a
ridge to the southeast recedes from the region tonight.

.Long term...
A light east breeze will persist from Tuesday through the
forecast period. Isolated to scattered showers are expected until
the weekend. No significant troughs or weather systems are
anticipated during this period at this time.

&&

.Marine...
Thunderstorms continue to elevate seas in the area. Hence, a Small
Craft Advisory remains in effect despite seas and winds being
below advisory thresholds. The advisory will remain until the
thunderstorms subside tonight.

A gentle breeze will produce calm seas for mariners from Tuesday
through the end of the week. However, a large south swell will
pass through coastal waters on Wednesday. Although the swells may
be strong, conditions over open waters are expected to remain
calm. However, surfs may be larger near the south shore until
Thursday night.

.PPG WATCHES/WARNINGS/ADVISORIES...
Small Craft Advisory

&&

$$

TM

American Samoa's Tropical Cyclone Outlook 2024-2025

Synoptic discussion for American Samoa.