Area Forecast Discussion
Issued by NWS Pago Pago
Issued by NWS Pago Pago
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