Synoptic: A weak surface trough over the Samoan islands drifting westward.
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.
Synoptic: A weak surface trough over the Samoan islands drifting westward.
The national radar mosaic for the moment the first event began.
1 flash flood. Local standard time, as filed.
WSO Pago Pago recorded .28 within the hour that prompted the issuance of a Small Stream Flood Advisory.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in American Samoa in 2018Every state in 2018This day in weather historyWarnings in American Samoa, September 2018
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: 808612.