An 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.
Every event with a place to put it. Tap one for its entry below.
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.
The episode as NWS ASO wrote it up.
An 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.
The national radar mosaic for the moment the first event began.
1 heavy rain, 1 strong wind. Local standard time, as filed.
For a 48-hour period (from the 16th to the 18th) the WSO Pago Pago recorded 5.52 inches of rain. This rain event prompted a landslide in Agugulu that blocked the westbound lane.
Close to midnight on the 17th of January, WSO Pago Pago recorded the highest gust for that day of 46 mph. This wind event caused some damage across Tutuila. On the 17th, the EOC reported a downed tree in Leone that blocked the road and caused traffic. On the 18th, An NWS employee reported downed trees and power lines in Utulei. Another NWS employee reported a tin roof blown off in the village of Nua and Seetaga.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in American Samoa in 2020Every state in 2020This day in weather historyWarnings in American Samoa, January 2020
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 2026-10-01. Each event’s entry at NCEI: 874473, 874481.