textproduct: WSO Pago Pago

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/issued 234 PM SST Wed Apr 29 2026/

Short term...

More sun than clouds remained over the American Samoa islands this morning and early this afternoon. Satellite imagery shows a weak trough to the north and east with decreasing east/southeasterly winds will a ridge remains to the south and west of the islands.

A slow moving weather pattern is anticipated for the rest of the week and this weekend. A high pressure system to the southwest is to remain centered near the New Zealand region. The ridge is not anticipated to reach as far north of American Samoa throughout this time. Therefore, weak east/southeasterlies remain. The trough is anticipated to remain weak as it moves far enough south to reach the islands. If showers occur from tonight through early Friday, however, it would be in the passing form. East/southeasterly are to become easterly up to 10 mph for Thursday and early Friday.

Long term...

The aforementioned trough is to remain over the islands by late Friday and remain through early next week. However, a low is anticipated to develop well to the southeast of American Samoa late this weekend and into early next week. Even though this low will not directly impact American Samoa, it may bring additional moisture from the north and west of the territory over the islands. This would cause the trough to strengthen and the risk of showers to increase. If rainfall occurs, it may be heavy enough to produce ponding on roadways but it is not anticipated to be heavy enough to cause flash flooding. However, we will monitor the track and strength of the trough throughout this week as the weather pattern develops to see if conditions would warrant a Flood Watch. Otherwise, more clouds than sun are forecast during the day and temperatures are to remain around average.

We are approaching the last day of hurricane season for American Samoa. We are not anticipating any development near American Samoa for the rest of the season.

Marine...

East/southeasterly winds continued to decrease this morning and early afternoon as it became a gentle breeze. Therefore, wind driven seas have eased with only a weak southerly swell moving through the American Samoa coastal waters. Seas around 5 to 6 feet are anticipated through the weekend. The easterly breeze continues to slowly decrease to become light and variable on Friday and Saturday. Conditions are forecast to be below the Small Craft and High Surf Advisory levels through the weekend.

PPG WATCHES/WARNINGS/ADVISORIES

NONE