American Samoa, 2025Flash Flood and Coastal Flood in American Samoa, May 7 to 10, 2025
May 7 to 10, 2025 · NWS ASO · 8 events in 1 county or zone
From May 5th through May 9th, a ridge from the south of the islands interacted with an equatorial trough to the north. This created high winds on the 6th through the 8th with gusts reaching around 55 mph at WSO Pago Pago.
Every event with a place to put it. Tap one for its entry below.
- Tornadoes
- Tropical storms and surge
- Floods
- Wind
- Hail
- Winter weather
- Heat and drought
- Cold
- Fire, smoke and dust
- Marine and coastal
- Other
Open the live radar over this ground
- Deaths
- 0
- Injuries
- 0
- Property damage
- $1.1 million
- Crop damage
- $39,000
- Events
- 8
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.
From May 5th through May 9th, a ridge from the south of the islands interacted with an equatorial trough to the north. This created high winds on the 6th through the 8th with gusts reaching around 55 mph at WSO Pago Pago. Total rainfall recorded at WSO Pago Pago was 12.62 inches during this time, including 4.93 inches which fell from 8:50 PM SST to 11:50 PM SST on the 9th. High winds also created minor coastal flooding and erosion along the southern and eastern coast lines. As American Samoa received well above average rainfall throughout the year along with this event, landslides occurred along some parts of the islands.
Event by event
3 heavy rain, 2 high surf, 1 coastal flood, 1 strong wind, 1 flash flood. Local standard time, as filed.
Heavy Rain, Tutuila
- When
- May 7, 7:00 AM SST to 8:00 AM SST
- Where
- Tutuila County, 4.36 mi WNW of Pago Pago
- Property damage
- $25,000
- Crop damage
- $5,000
- Reported by
- Public
- Coordinates
- -14.267, -170.655
A landslide occurred on the roadway connecting Aua and Afono villages, Route 006, that covered both sides of the road. A picture shows large trees, dirt and rocks from North Pioa mountain on the roadway. American Samoa Mesonet (University of Hawaii) recorded over 1.5 inches in the region from the morning of May 6th through the morning of May 7th, along with well above average rainfall the prior week. There were no injuries.
Heavy Rain, Tutuila
- When
- May 7, 7:00 AM SST to 10:00 AM SST
- Where
- Tutuila County, 7.65 mi NW of Vaitogi
- Property damage
- $10,000
- Reported by
- NWS Employee
- Coordinates
- -14.333, -170.791
An NWS employee reported a minor landslide from Masinaoleafiali Ridge along the main road along Asili and Amaluia villages on the morning of May 7th. Rocks covered the westbound lane of the road. Estimated rainfall from the mornings between the 6th and 7th were two inches along with above average rainfall so far in May.
High Surf, Tutuila
- When
- May 7, 11:00 AM SST to 11:00 PM SST
- Where
- Tutuila forecast zone
- Property damage
- $20,000
- Crop damage
- $4,000
- Reported by
- NWS Employee
An NWS employee reported ocean debris along the main road at Utumea West village and minor coastal erosion. Estimated surf heights were 18 feet.
High Surf, Tutuila
- When
- May 7, 1:00 PM SST to 11:00 PM SST
- Where
- Tutuila forecast zone
- Property damage
- $10,000
- Reported by
- NWS Employee
An NWS employee observed ocean debris along the roadway caused by high surf in Laulii village. Estimated surf heights were 18 feet.
Coastal Flood, Tutuila
- When
- May 7, 4:00 PM SST to 11:00 PM SST
- Where
- Tutuila forecast zone
- Property damage
- $30,000
- Reported by
- NWS Employee
High surf along the east coast of Coconut Point (Nuuu'li village) created minor coastal erosion on the evening of May 7th. Coastal flooding was observed on the Pala Lagoon side of Coconut Point. Pictures show a flooded house along the lagoon.
Strong Wind, Tutuila
- When
- May 8, 6:00 AM SST to 10:00 AM SST
- Where
- Tutuila forecast zone
- Measured
- 30 kt (35 mph) estimated sustained
- Crop damage
- $30,000
- Reported by
- NWS Employee
A phone call from a local in the Nuuuli village reported downed banana trees blown over from strong winds.
Heavy Rain, Tutuila
- When
- May 8, 12:00 PM SST to 2:00 PM SST
- Where
- Tutuila County, 5.68 mi W of Pago Pago
- Property damage
- $5,000
- Reported by
- Public
- Coordinates
- -14.301, -170.685
A driver along the main road in Matu'u village reported a minor landslide in the early afternoon of the 8th. A picture shows rocks blocking the westbound lane of the roadway. Estimated rainfall was 6 inches on May 5th through May 8th.
Flash Flood, Tutuila
- When
- May 9, 6:00 PM SST to May 10, 2:00 AM SST
- Where
- Tutuila County, 5.69 mi NNW of Vaitogi to 5.55 mi NNW of Vaitogi
- Cause
- Heavy Rain
- Property damage
- $1.0 million
- Reported by
- NWS Employee
- Coordinates
- -14.324, -170.732
An NWS employee reported considerable flash flooding along Fagaima Road, Route 019, in the early morning hours on the 10th. Water over 6 inches high rushed violently from west to east along the roadway. Considerable damage was reported on the road with large chunks of asphalt taken away from the road and large amounts of water puddled onto properties along the road. Estimated rainfall was 6 inches in 3 hours between 9 PM and 12 AM.
- Heavy Rain
- Rainfall totals unusual for the place and season that did not produce a flood.
- High Surf
- Large waves breaking on the shore that caused damage, erosion or casualties.
- Coastal Flood
- Flooding of coastal land by the sea, from storm surge, onshore wind or high tides.
- Strong Wind
- Non-thunderstorm winds below high wind criteria that nonetheless caused damage or casualties.
- 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.
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