Area Forecast Discussion
Issued by NWS Pago Pago
Issued by NWS Pago Pago
990 FXZS60 NSTU 180056 AFDPPG Area Forecast Discussion National Weather Service Pago Pago AS 156 PM SST Fri Oct 17 2025 .Discussion... Thunderstorms continue to build in the American Samoa region as an active trough lingers. This is evident on latest satellite data showing lightning signals and convection developing over and across the Islands. Model data holds an unstable and moist environment through the new week as the trough remains anchored in the region. A high pressure system to the south will hold the trough in it`s current position through at least Tuesday. Additionally, the high will usher trade winds to accompany the trough. Hence, expect flash flooding conditions and breezy winds, gusty at times to continue for this timeframe. When the trough finally exits the region on Tuesday, showers will follow a diminishing trend. However, breezy winds will linger for most of the week. && .Marine... Latest wave heights at the PacIOOS buoys are around 6 to 8 feet and within small craft advisory thresholds. Although a north swell is evident, current observations do not reach the high surf advisory threshold. This means surfs aren`t as hazardous as out in the open ocean. Expect elevated ocean conditions through the weekend as seas are higher near thunderstorms. However, as the trough diminishes Tuesday, trade winds will keep seas in a rough state for the remainder of the forecast period. && .PPG WATCHES/WARNINGS/ADVISORIES... Flash Flood Watch Small Craft Advisory && $$