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Heavy Rain · American Samoa

Heavy Rain May 18, 2026 · Manu'a, American Samoa

$10K
Damage as recorded

Where the report was made, with tornadoes recorded within 15 miles over the years.

What the National Weather Service wrote

A villager living in the Ofu/Olosega islands region reported a series of small landslides across both islands. These landslides occurred during heavy rainfall on the 18th. Estimated rainfall over the islands is 5 inches throughout the day. Monetary damage is estimated.

The wider storm

A strong high pressure system centered to the south of Fiji moved a trough from the south of American Samoa onto the territorial islands on May 16th through the 18th. This stationary weather pattern lead to over 9.68 inches of rain recorded at WFO American Samoa. This includes 3.55 inches that fell in two hours on the afternoon of the 18th. This intense rainfall led to widespread flash flooding throughout the territory. Multiple landslides were also reported due to the intense rainfall on saturated soils.

Began near Pago Pago (-14.1833, -169.6638).

Source: NOAA Storm Events Database, event 1338935. Narratives are written by the National Weather Service forecast office that issued the report.

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