textproduct: WSO Pago Pago

Long term

By Thursday, the easterly trades begin to decrease. A ridge from the southwest is to strengthen and bring the trough closer to the islands. The risk of rain increases on Thursday and Friday to numerous showers (60% chance), but still is not forecast to be strong enough to produce heavy showers.

However, a low pressure system forecast to be well to the southeast by Friday night and into the upcoming weekend is anticipated to help bring is moist air from the northwest at the lower to middle levels of the atmosphere over American Samoa. Wind convergence from the aforementioned ridge to the southwest and a ridge from the east would increase the risk of showers to potentially widespread (80% chance or higher). We will monitor the weather pattern development for this timeframe throughout the week.

Marine

Seas have gradually eased throughout the overnight hours and this morning. However, the PacIOOS buoy to the east of Aunu'u still shows seas around 7 feet, which is near the Small Craft Advisory levels. As the moderate to fresh easterly trades are forecast to remain over the American Samoa coastal waters, seas are expected to be choppy and near Small Craft Advisory conditions through Tuesday night before the easterlies begin to decrease. Due to the choppy waters, the Small Craft Advisory currently remains in effect.

By Wednesday night through late in the week, a southeasterly swell is expected to begin moving through the region. Even though the easterly trades are to weaken, to become a gentle to moderate breeze, the swell will likely slowly build seas to reach as high as 9 feet late in the week.

PPG WATCHES/WARNINGS/ADVISORIES

A Small Craft Advisory remains in effect.