Area Forecast Discussion
Issued by NWS Pago Pago
Issued by NWS Pago Pago
698 FXZS60 NSTU 120108 AFDPPG Area Forecast Discussion National Weather Service Pago Pago AS 208 PM SST Fri Sep 11 2026 .Discussion... Fair weather is observed over the territory as a gentle breeze and isolated showers. The Islands currently sit within a transition zone as the high pressure system that drove weather earlier this week continues to move eastward. Meanwhile, another high pressure system building to the southwest is forecast to take over weather conditions by Saturday. This pattern will shift east winds southeast tonight and gradually increase to 15 knots over the weekend. As easterly and southeasterly winds converge just north of the territory, a trough is expected to develop in the area. This feature will bring an uptick in showers Saturday, with a greater increase expected Sunday night through Tuesday as the trough develops further. It remains uncertain how active the trough would become, but we will continue to monitor how conditions evolve. Model guidance suggests the trough lingering through the end of next week before finally moving eastward next Saturday. && .Marine... Light and variable winds have maintained relatively calm ocean conditions, with the PacIOOS buoys reporting seas of 4 to 6 feet. These conditions are expected to continue through Saturday. Seas will begin to build Saturday night as southeast winds strengthen to around 15 knots. Although winds will remain below advisory levels, they may produce choppier, more textured seas. Meanwhile, a strong south swell will move into the area tonight. This swell is expected to primarily increase surf and strengthen rip currents along south-facing shores rather than significantly increase seas over the open waters. A series of south swells will continue through the new week. Wind-driven seas may reach advisory levels by Monday as southeast winds strengthen to around 20 knots. If the aforementioned trough becomes active, nearby thunderstorms could produce locally higher seas and gusty winds. && .PPG WATCHES/WARNINGS/ADVISORIES... None && $$ TM