1 flash flood, as filed by the National Weather Service.
Every event with a place to put it; 1 filed by county or forecast zone are drawn at its center, in a lighter ring. 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 national radar mosaic for the moment the first event began.
1 flash flood. Local standard time, as filed.
Heavy thunderstorm rains produced flash flooding along the San Gabriel River, just north of Azusa. One hundred hikers had to be rescued when the river overflowed its banks.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in California in 1999Every state in 1999This day in weather historyWarnings in California, July 1999
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: 5706560.