American Samoa, 2023Flash Flood and Flood in American Samoa, May 17, 2023
May 17, 2023 · NWS ASO · 2 events in 2 counties and zones
A strong trough moved over the American Samoa islands on May 17th to cause widespread flash flooding in the region. 10 inches of rainfall at Fagaitua throughout the day.
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- Deaths
- 0
- Injuries
- 0
- Property damage
- $260,000
- Crop damage
- None recorded
- Events
- 2
Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.
A strong trough moved over the American Samoa islands on May 17th to cause widespread flash flooding in the region. The highest amount of rainfall recorded was from an ASPA (American Samoa Power Authority) weather station, which recorded 9.10 inches of rainfall at Fagaitua throughout the day. The majority of this rainfall came between 100 and 700SST. WSO Pago Pago received 2.83 inches during this time.
Flash Flood, Manu'A
- When
- May 17, 1:00 AM SST to 7:00 AM SST
- Where
- Manu'A County, 6.34 mi NNE of Ta'U to 6.57 mi NNE of Ta'U
- Cause
- Heavy Rain
- Property damage
- $250,000
- Reported by
- Emergency Manager
- Coordinates
- -14.214, -169.468
Emergency Management reported a landslide due to heavy rainfall between the villages of Fitiuta and village of Ta'u on the island of Ta'u during the early morning hours of May 17th. The landslide caused large boulders to topple over the only road that connects the two villages. Heavy rainfall also cause erosion underneath the road to create significant damage to the roadway making it impassible. There were no injuries.
Flood, Tutuila
- When
- May 17, 5:00 AM SST
- Where
- Tutuila County, 6.43 mi N of Vaitogi to 6.4 mi N of Vaitogi
- Cause
- Heavy Rain
- Property damage
- $10,000
- Reported by
- NWS Employee
- Coordinates
- -14.307, -170.706
Sagamea stream overflowed early Tuesday morning from heavy rainfall to cause debris flow to occur on both westbound and eastbound lanes of the main road in the village of Nu'uuli. The overflowed stream sent rocks, wood, tree limbs, and garbage to cover the roadway.
- Flash Flood
- Flooding that begins within six hours of the rain that causes it, or of a dam or levee failure or ice jam release, often with deadly speed.
- Flood
- Flooding that develops more slowly than a flash flood: rivers leaving their banks, or water standing over land for an extended time.
After NWS Directive 10-1605, the rules offices file Storm Data by.
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- Marine Thunderstorm Winds in South Atlantic Coastal Waters, May 17, 20235 events
- Hail and Damaging Winds in Florida, May 17, 202350 kt wind · 5 events
- Dense Smoke in South Dakota, May 17, 20235 events
- Flood and Hail in South Dakota, May 17, 20231 in hail · 4 events
- Marine Thunderstorm Winds in South Atlantic Coastal Waters, May 17, 202350 kt wind · 4 events
- Hail in Texas, May 17, 20231.75 in hail · 4 events
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- Hail in Wyoming, May 17, 20231 in hail · 2 events
- Hail in Arizona, May 17, 20231.5 in hail · 2 events
NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-09-24. Each event’s entry at NCEI: 1093389, 1093392.