California, 1999

Flash Flood in California, July 11, 1999

July 11, 1999 · NWS SGX · 1 event in 1 county or zone

1 flash flood, as filed by the National Weather Service.

Where it happened

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.

  • Tornadoes
  • Tropical storms and surge
  • Floods
  • Wind
  • Hail
  • Winter weather
  • Heat and drought
  • Cold
  • Fire, smoke and dust
  • Marine and coastal
  • Other

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The toll

Deaths
0
Injuries
0
Property damage
$1.0 million
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.

The radar

The Edwards AFB radar (KEYX), 129 km away, was scanning. The volume nearest the first event began at 22:20 UTC.

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Event by event

1 flash flood. Local standard time, as filed.

Flash Flood, San Bernardino

When
July 11, 2:20 PM PST to 5:00 PM PST
Where
San Bernardino County, 5 mi NW of Apple Vly
Property damage
$1.0 million
Reported by
TRAINED SPOTTER
Coordinates
34.841, -116.178 (the zone’s center; the record gives no point)

Nearly an inch of rain in less than 45 minutes flooded a one mile section of Highway 18, stranding several motorists. Fifty homes and businesses were flooded in the same area with a half foot to two feet of water and mud.

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 California in 1999Every state in 1999This day in weather historyWarnings in California, 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: 5706823.