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Flash Flood · American Samoa
Flash Flood October 22, 2025 · Tutuila, American Samoa
Where the report was made, with tornadoes recorded within 15 miles over the years.
What the National Weather Service wrote
Flash flooding occurred along Fagaima Road around midday on October 22nd due to heavy rainfall and storm water drainage issues. NWS employee Brayden Barton provided photos showing significant water intrusion into properties and homes adjacent to the roadway. Saturated grounds from recent rainfall exacerbated runoff and contributed to the flooding.
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 (-14.3238, -170.7313).
Source: NOAA Storm Events Database, event 1298729. Narratives are written by the National Weather Service forecast office that issued the report.
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