Heavy Rain in American Samoa

Events

126

Deaths

0

Injuries

0

Damage

$2.0 million

• Flash Flooding and Flood in American Samoa, January 5 to 10, 2025$2.3 million · 20 eventsFrom January 6th through January 10th, a strong South Pacific Convergence Zone (SPCZ) strengthened over the American Samoa islands. WSO Pago Pago recorded 16.33 inches of rain during these 5 days and 21.39 inches of rainfall was measured from Jan 04th through the 10th.
• Flash Flooding and Flooding in American Samoa, February 17 to 22, 2025$1.5 million · 61 kt wind · 29 eventsFrom the evening of February 16th to the morning of February 22nd, a strong South Pacific Convergence Zone (SPCZ) moved over Tutuila, Aunu'u, and the Manu'a islands of American Samoa, bringing sustained heavy rainfall and high winds across the territory.
• High Surf and Strong Wind in American Samoa, July 3 to 7, 2021$1.4 million · 4 eventsAn active surface trough moved over the territory on the weekend of July 4th. This feature produced widespread impacts of flash flooding, coastal erosion, and landslides.
• Flash Flood and Coastal Flood in American Samoa, May 7 to 10, 2025$1.1 million · 8 eventsFrom 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.
• Flash Flooding and Heavy Rain in American Samoa, May 18, 2026$365,000 · 15 eventsA 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.
• Damaging Winds and Heavy Rain in American Samoa, February 3, 2024$395,000 · 52 kt wind · 7 eventsOn the evening of February 3rd through February 4th, an embedded low pressure system within the South Pacific Convergence Zone (SPCZ) moved over all islands of American Samoa.
• Heavy Rain in American Samoa, May 10 to 11, 2017$350,000 · 1 eventExtremely heavy runoffs, landslides, and severe flash flooding were results of heavy rain from an active surface trough near American Samoa.
• Heavy Rain in American Samoa, February 21, 2024$265,000 · 2 eventsStrong rainfall from the South Pacific Convergence occurred from February 10th through the 20th. WSO Pago Pago received 15.11 inches of rain, while the US Park Service Weather Station at Mount Tumu in Ofu recorded 13.28 inches during that time.
• Flash Flooding and Damaging Wind in American Samoa, December 14 to 16, 2023$167,000 · 7 eventsA strong South Pacific Convergence Zone moved over American Samoa on December 14th through the 16th.
• Flash Flood and Heavy Rain in American Samoa, December 10 to 18, 2020$170,000 · 2 eventsThe Active SPCZ, which formed Tropical Cyclone Zasu as well as YASA produced a week downpour of rain and strong winds for the Islands of American Samoa.
• Damaging Wind and Heavy Rain in American Samoa, May 20, 2026$160,000 · 2 eventsA thunderstorm moved over Tutuila island on the morning of May 20th. Gusty winds accompanied heavy rainfall. The highest estimated winds are on the western edge of the island where structural damage and flying debris were reported.
• Flash Flood and Heavy Rain in American Samoa, January 21, 2022$140,000 · 3 eventsThe SPCZ produced heavy rainfall across the territory, mainly in central and western villages on Tutuila.
• Flash Flood and High Wind in American Samoa, February 16 to 17, 2020$93,000 · 59 kt wind · 8 eventsAn extremely active monsoonal trough in the region of American Samoa, generated an extended period of damaging winds, high surf and flooding rains.
• Heavy Rain in American Samoa, May 26, 2023$80,000 · 4 eventsA strong trough produced heavy rainfall occurred over Tutuila on May 26th between 300 and 700SST to cause widespread flooding over the island. The rainfall produced numerous landslides across the island.
• Heavy Rain in American Samoa, January 4 to 9, 2023$70,000 · 3 eventsBetween January 1st and January 9th, multiple slow moving troughs moved over American Samoa. 12.41 inches was recorded at WSO Pago Pago. Multiple landslides occurred on Tutuila island on January 9th.
• Heavy Rain in American Samoa, February 1, 2006$60,000 · 1 eventHeavy rainfall flooded 50 percent of homes in the village of Tafuna. Personal properties, including household goods, were ruined by the increasing flow of water. Two families were "forced from their homes by the floodwaters" and no injury reported.
• Heavy Rain in American Samoa, February 2 to 3, 2022$50,000 · 1 eventA surface trough over the Islands held the potential for flash flooding for 02/02/2022 to 02/03/2022.
• Heavy Rain in American Samoa, January 13 to 15, 2022$30,000 · 3 eventsThe South Pacific Convergence zone (SPCZ) moving across the territory resulted in heavy rainfall over the Islands.
• High Wind and Heavy Rain in American Samoa, February 22, 2021$30,000 · 2 eventsAn active South Pacific Convergence Zone (SPCZ) over the islands developed strong winds and heavy rainfall for the territory.
• Heavy Rain in American Samoa, February 12 to 19, 2022$30,000 · 2 eventsA surface trough that remained anchored over the territory through the timeframe of events produce heavy rainfall for the Islands.
• Heavy Rain in American Samoa, May 13 to 17, 2022$30,000 · 2 eventsA stationary front produced heavy showers and flash flooding on May 13 and May 15 to May 17.
• Heavy Rain in American Samoa, January 30, 2018$27,000 · 1 eventModerate to heavy rains just days earlier leading up to January 30th triggered a mudslide near a residential area in the village of Utulei, between the hours of 7:30 AM and 8 AM.
• Heavy Rain and Strong Wind in American Samoa, January 16 to 18, 2020$25,000 · 2 eventsAn active monsoonal trough lifted across the area from the 17th of January until the week after. This weather event produced heavy showers and strong winds over the territory, which caused landslides and flooded roadways as well as downed trees and power lines.
• Flash Flood and Heavy Rain in American Samoa, October 26 to 27, 2022$25,000 · 2 eventsA stationary front produced heavy showers for the territory that produced flash flooding across Tutuila on the 26th and 27th of October.
• Flash Flood and Heavy Rain in American Samoa, September 29 to 30, 2018$20,000 · 2 eventsSynoptic: A cold front moving across the islands, prompting Flash Flood Watch Saturday, September 29th through Tuesday, October 2nd.

Heavy Rain everywhereEvery kind of event in American Samoa

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.