Synoptic discussion for American Samoa.

698
FXZS60 NSTU 200117
AFDPPG

Area Forecast Discussion
National Weather Service Pago Pago AS
217 PM SST Sun Jan 19 2025

.Short term...

Satellite imagery this morning and early afternoon shows
convection to the north and east of the American Samoa islands. In
the meantime, mostly sunny skies and light winds are giving above
average temperatures over the territory today. An upper level
high is keeping the majority of the rainfall north, but showers
are likely tonight through tomorrow morning. If showers occur,
rainfall is to be in the passing form. The chance of showers
reduce from numerous showers (60% chance) to scattered showers
(40% chance) on Monday with rainfall not expecting to cause
flooding in the region. Winds are expected to be light and
variable through Monday.

.Long term...

Overall, rainfall from the middle to late week is to be below
normal for this time of the year. A weak high pressure is forecast
to build in on Tuesday and will remain for the rest of the week.
If rainfall occurs, it will be in the passing form. Winds become
easterly on Tuesday and may reach up to around 15 mph for the rest
of the week.

Tropical development is not expected for the next 7 days.

&&

.Marine...

The light and variable breeze has led to ideal conditions
throughout the American Samoa coastal waters as wind driven waves
are minimal. PacIOOS buoys to the west of Tutuila and to the east
of Aunu`u show swell now moving in from the north, but remaining
weak and not having a significant impact throughout the region. Otherwise,
winds are forecast to remain light and variable through Monday,
but increase to a moderate easterly breeze by Tuesday through the
rest of the week. Conditions are likely to remain below Small
Craft Advisory levels throughout the week.

&&

.PPG WATCHES/WARNINGS/ADVISORIES...

NONE

&&

$$

LaPlante

American Samoa's Tropical Cyclone Outlook 2024-2025

Synoptic discussion for American Samoa.