A low level convergence trough in the area produced heavy rainfall within a 24 hour period, which produced flooded hotspots across the territory.
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.
A low level convergence trough in the area produced heavy rainfall within a 24 hour period, which produced flooded hotspots across the territory.
The national radar mosaic for the moment the first event began.
1 flash flood. Local standard time, as filed.
Saturated grounds from days prior to the 17th enhanced flooding in low-lying areas; rainfall reached 2.25 inches of rain early that morning. This event caused stalled cars across the territory and crater-sized potholes in poor drainage areas.
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, August 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 2026-09-24. Each event’s entry at NCEI: 920096.