Flash Flood, Guam
- When
- October 19, 2:30 PM SST to 4:30 PM SST
- Where
- Guam County, Southwest Portion
- Property damage
- $5,000
- Reported by
- NEWSPAPER
- Coordinates
- 13.600, 144.800
Flash Flood in Guam, October 19, 2005
A nearly stationary thunderstorm dumped up to 5 inches of rain over the mountains and coastal areas of southwestern Guam from Agat south through Umatac to Merizo. Water and mud from the Talifak River entered a market in Agat and swept around several homes.
Where it happened
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
The toll
- Deaths
- 0
- Injuries
- 0
- Property damage
- $5,000
- Crop damage
- None recorded
- Events
- 1
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.
What happened
The episode as NWS GUA wrote it up.
A nearly stationary thunderstorm dumped up to 5 inches of rain over the mountains and coastal areas of southwestern Guam from Agat south through Umatac to Merizo. Water and mud from the Talifak River entered a market in Agat and swept around several homes. Several roads were covered with mud and debris, which had to be cleared by crews with backhoes and dump trucks. The automated station at Merizo measured 3.04 inches of rain in the three hours ending at 1700 SST, including 2.64 inches in the hour ending at 1600 SST. Doppler radar indicated one-hour rainfalls as high as 4 inches in the area at the height of the storm.
The radar
The national radar mosaic for the moment the first event began.
Event by event
1 flash flood. Local standard time, as filed.
What these are
- 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.
After NWS Directive 10-1605, the rules offices file Storm Data by.
The same day elsewhere
More
Every storm in Guam in 2005Every state in 2005This day in weather historyWarnings in Guam, October 2005
Sources
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: 5476540.