329
FXZS60 NSTU 210018
AFDPPG

Area Forecast Discussion
National Weather Service Pago Pago  AS
118 PM SST Thu Nov 20 2025

.Discussion...
An active trough over the region continues to develop
thunderstorms for the area. Latest satellite data indicates
lightning signals scattered over Tutuila, but more so over Manu`a
and eastward. A high pressure system to the south will hold the
trough over the Islands through the weekend. Hence, a flash flood
watch was issued this morning and will remain through Saturday,
especially as rain gauges have reached near 2 inches of rain,
some more, within the last 12 hours.

Model trends keep active weather through at least Saturday,
before gradually diminishing Saturday night as the trough shifts
southward. A low pressure system developing near Fiji is forecast
to pull the trough towards it and away from the Islands by this
time. Light and variable winds as well as scattered showers will
persist for the rest of the forecast period.

&&

.Marine...
Although winds remain near 10 knots, wave heights observed are
elevated at around 9 feet due to the aforementioned high pressure
system. Additionally, thunderstorms in the area are also
contributing to rough ocean conditions. Expect these conditions
to persist through Friday, before gradually subsiding Saturday as
the high and trough finally exits the region. No significant winds
or swells are expected for the new week.

&&

.PPG WATCHES/WARNINGS/ADVISORIES...
Flash Flood Watch
High Surf Advisory
Small Craft Advisory

&&

$$

TM