Area Forecast Discussion
Issued by NWS Pago Pago
Issued by NWS Pago Pago
489 FXZS60 NSTU 250113 AFDPPG Area Forecast Discussion National Weather Service Pago Pago AS 213 PM SST Tue Sep 24 2024 .Short term... A trough just south of the Islands will continue to hold numerous showers and a slight chance for Thunderstorms in the area through Wednesday night. However, latest GDI trends (instability indicator) shows higher values on Thursday. This information suggests the trough will be most active Thursday, with a potential for flooding. .Long term... Meanwhile a high pressure system passing south of the territory will elevate winds by Friday. This system will bring breezy winds for the remainder of the forecast period, while pushing the aforementioned trough further north. Expect scattered showers and breezy weather to remain through the new week. && .Marine... Latest observations show wave heights around 5 to 7 feet while peak periods are around 18 seconds. These long periods suggests a large south swell passing through the area. Hence, a high surf advisory is in effect as large surfs and strong rip currents are possible with these swells. Model data depicts the swells briefly subsiding Wednesday before another round of swells moves in from the South on Thursday. Hence, the high surf advisory will likely hold through the end of the week. Furthermore, wave heights will gradually build Thursday and peak Friday with upcoming winds. .PPG WATCHES/WARNINGS/ADVISORIES... High Surf Advisory && $$ TM