textproduct: WSO Pago Pago

Long term

We are monitoring the timeframe between Friday evening through early Monday morning for American Samoa. The aforementioned trough is to strengthen as an equatorial ridge from the north interacts with the aforementioned ridge to the southwest. This is to create stronger wind convergence along the trough, which will likely be strong enough to produce above average rainfall that may be heavy at times. We will continue to monitor the exact location of the trough forecast for this time. If the ridge to the southwest isn't strong enough to push the trough over the region, flash flooding is not likely. However, showers remain at least likely regardless to the exact location. If the trough moves directly over the islands, widespread showers with the potential for heavy rainfall is likely.

By early next week, the trough will likely begin to move away from the region and rainfall returns to near normal.

Marine

Data from the PacIOOS buoys to the east of Aunu'u and to the west of Tutuila show seas below Small Craft Advisory levels. As the easterly breeze decreased, the wind driven seas eased to better conditions along the American Samoa coastal waters compared to yesterday. However, we are monitoring southerly swell to strengthen throughout the day tomorrow. This will cause swell timing to increase and seas to at least approach Small Craft Advisory levels through Thursday night. However, another round of southerly swell is to move through the coastal waters on late Friday through the weekend. The elevated swell along with a fresh east/southeasterly wind is to create hazardous seas during this timeframe.

PPG WATCHES/WARNINGS/ADVISORIES

NONE