Flood, Guam
- When
- July 29, 12:00 AM SST to 7:00 AM SST
- Where
- Guam County, Countywide
- Reported by
- OFFICIAL NWS OBS.
Flooding in Guam, July 29 to 30, 1999
07 inches of rain fell at the National Weather Service Office in Tiyan. 74 of an inch of rain fell between 2200 and midnight , most falling between 2300 and midnight.
The toll
- Deaths
- 0
- Injuries
- 0
- Property damage
- None recorded
- Crop damage
- None recorded
- Events
- 2
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.
Between Midnight and 0400 2.07 inches of rain fell at the National Weather Service Office in Tiyan. An additional 0.74 of an inch of rain fell between 2200 and midnight , most falling between 2300 and midnight. Upper level divergent winds combined with low level winds converging into the Monsoon trough caused heavy showers to move across Guam.
Event by event
2 flood. Local standard time, as filed.
Flood, Guam
- When
- July 29, 10:00 PM SST to July 30, 12:00 AM SST
- Where
- Guam County, Central Portion
- Reported by
- OFFICIAL NWS OBS.
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
- Heat in Wisconsin, July 29 to 31, 1999
- Heat in Texas, July 29, 1999
- Flash Flood in New Mexico, July 29, 1999
- Hail and Damaging Winds in Georgia, July 29, 1999
- Damaging Wind in Alabama, July 29, 1999
- Heat in Minnesota, July 29 to 30, 1999
- Lightning Strike in North Carolina, July 29, 1999
- Damaging Wind and Lightning Strike in North Carolina, July 29, 1999
- Tornado in Texas, July 29, 1999
- Damaging Winds in Ohio, July 29, 1999
- Damaging Wind in Alabama, July 29, 1999
- Damaging Wind in Virginia, July 29, 1999
More
Every storm in Guam in 1999Every state in 1999This day in weather historyWarnings in Guam, July 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: 5701319, 5701320.