textproduct: WSO Pago Pago

Long term

A trough has developed near the Fiji region and extends southeastward to the Tonga islands. A ridge of high pressure remains to the south. This trough is anticipated to remain to the south of American Samoa through at least Saturday. However, we will monitor the strength of the ridge for the second half of the weekend and early next week. If the ridge strengthens and moves further northward, this strong trough will move closer to American Samoa. At this time, it appears that the heavier rainfall will be to the south of the islands but will continue to monitor this weather pattern and may need to issue a Flood Watch, if warranted.

Otherwise, winds are forecast to only increase to around 10 mph with higher gusts near showers. More clouds than sun are anticipated with temperatures back to average for this time of the year.

Marine

Data from the PacIOOS buoys to the west of Tutuila and to the east of Aunu'u shows seas are below advisory levels. Weak southerly swell is continuing to move through the American Samoa coastal waters and is forecast to weaken through Saturday. With gentle easterlies also forecast throughout this time, ideal sea conditions are expected. For Sunday through early next week, another round of swell is to move through the American Samoa waters along with a trough moving closer to the area. Even though winds are anticipated to be lower than 20 knots, with the exception of gusts near potential showers, seas will likely reach around or over 8 feet during this time.

PPG WATCHES/WARNINGS/ADVISORIES

NONE