Area Forecast Discussion
Issued by NWS Pago Pago
Issued by NWS Pago Pago
552 FXZS60 NSTU 280109 AFDPPG Area Forecast Discussion National Weather Service Pago Pago AS 209 PM SST Mon Jul 27 2026 .Discussion... Latest satellite imagery shows the line of showers mentioned in yesterday`s forecast extending across the Samoa Island chain. This feature brought an uptick in showers overnight, with rainfall nearing one inch at Toa Ridge. Expect this line to linger over the Samoa Islands through Tuesday. Model guidance suggests the trough will weaken by Tuesday afternoon. However, since the showers have been delayed by a day, we will continue to monitor how conditions evolve. In the meantime, trade winds are still expected to build in the area Tuesday. Southeast winds of around 15 mph are already being observed across the area, suggesting the high pressure near New Zealand extends over the Samoa Islands. This system is forecast to push the aforementioned showers farther north Tuesday afternoon and maintain breezy weather through Friday. By Saturday, the high pressure system is expected to exit the region. Expect light winds and fair weather through the new week. && .Marine... Observations from the PacIOOS buoys show wave heights in the range of 6 to 7 feet with peak periods up to 17 seconds from a southwest swell. Although wave heights are currently below advisory criteria (8 feet), both a Small Craft Advisory and High Surf Advisory are now in effect due to the southwest swell. Furthermore, seas are forecast to build throughout the week as winds strengthen in the area starting Tuesday. Wave heights are expected to peak Wednesday into Thursday due to persistent trade winds before subsiding over the weekend as winds diminish. .PPG WATCHES/WARNINGS/ADVISORIES... Small Craft Advisory High Surf Advisory && $$ TM