Synoptic discussion for American Samoa.

392
FXZS60 NSTU 210118
AFDPPG

Area Forecast Discussion
National Weather Service Pago Pago AS
218 PM SST Wed Nov 20 2024

.Short term...
Deep convections continues to develop over the territory due to a
low pressure system northwest of Savaii. Although no tropical
cyclone activity is expected from this system, a flash flood
watch is in effect through tonight as convection is forecast to
spread throughout the region surrounding American Samoa.
Expect widespread showers and gusty winds, as well as
thunderstorms through tonight. Model trends diminish flooding
conditions later tonight, but could be extended until Thursday
morning if the low pressure remains stationary. However, model
data are in agreement that the low will taper as it moves further
west.

.Long term...
The trough influencing current weather will linger across the
region through the new week. The potential for flooding is low for
this time, but periods of heavy showers are possible.
Additionally, winds will generally be from the east at 10 to 20
mph.

&&

.Marine...
Latest wave heights reported by the Aunu`u PacIOOS buoy are around
10 feet due to strong east winds up to 25 knots. As wave heights
gradually diminish Thursday, expect surfs to fall below the
advisory thresholds. However, breezy winds (15 to 20 knots) will
continue rough ocean conditions through Saturday, so expect the
small craft advisory to remain until then.

By Saturday night, ideal ocean conditions are expected as winds
diminish to a gentle easterly breeze.

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

&&

$$

TM

American Samoa's Tropical Cyclone Outlook 2024-2025

Synoptic discussion for American Samoa.