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Flash Flood · American Samoa

Flash Flood October 22, 2025 · Tutuila, American Samoa

$50K
Damage as recorded

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

What the National Weather Service wrote

An NWS employee reported flash flooding near American Samoa Community College, with water intruding into buildings due to heavy rainfall and inadequate storm water drainage. Grounds were saturated from recent rainfall, exacerbating runoff issues.

The wider storm

On October 21'22, a subtropical high-pressure system to the south and a near-equatorial ridge to the north combined to enhance a trough over the American Samoa islands. This setup resulted in 6.26 inches of rainfall at WSO Pago Pago over a 48-hour period. With soils already saturated from well-above-average October rainfall and widespread poor stormwater drainage across the territory, impacts were significantly exacerbated. The event led to widespread flash flooding and landslides throughout American Samoa.

Began near Vaitogi (-14.3225, -170.7424).

Source: NOAA Storm Events Database, event 1298730. Narratives are written by the National Weather Service forecast office that issued the report.

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