Flood, Guam
- When
- August 5, 11:00 AM SST to 3:00 PM SST
- Where
- Guam County, Countywide
- Reported by
- OFFICIAL NWS OBS.
Flood in Guam, August 5, 1999
Light winds allowed a sea breeze to develop over Guam. Daytime heating combined with wind convergence from the sea breeze toproduce showers and thunderstorms across the island.
The toll
- Deaths
- 0
- Injuries
- 0
- Property damage
- None recorded
- 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.
Light winds allowed a sea breeze to develop over Guam. Daytime heating combined with wind convergence from the sea breeze toproduce showers and thunderstorms across the island. Nexrad weather radar showed a one-hour rainfall rate of two and a half inches of rain near Dededo and a one-hour rainfall rate of one and a half inches of rain near Agat.
Event by event
1 flood. Local standard time, as filed.
What these are
- Flood
- Flooding that develops more slowly than a flash flood: rivers leaving their banks, or water standing over land for an extended time.
After NWS Directive 10-1605, the rules offices file Storm Data by.
The same day elsewhere
- Tornado in Colorado, August 5, 1999
- Lightning Strike in Arizona, August 5, 1999
- Lightning Strike in Oklahoma, August 5, 1999
- Hail and Damaging Winds in New Hampshire, August 5, 1999
- Damaging Wind in Connecticut, August 5, 1999
- Lightning Strike in Wyoming, August 5, 1999
- Lightning Strike in Washington, August 5, 1999
- Hail and Damaging Winds in Massachusetts, August 5, 1999
- Hail and Damaging Winds in New York, August 5, 1999
- Hail and Damaging Winds in Ohio, August 5, 1999
- Hail and Damaging Winds in Connecticut, August 5, 1999
- Waterspouts in Pennsylvania, August 5 to 21, 1999
More
Every storm in Guam in 1999Every state in 1999This day in weather historyWarnings in Guam, August 1999
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 2026-09-24. Each event’s entry at NCEI: 5721545.