Flash Flood in California, July 12, 1999

Name: Flash Flood in California, July 12, 1999
Start: 1999-07-12T17:55
End: 1999-07-12T20:00
Location: California

July 12, 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 01:52 UTC.

Open the radar archive at this moment

Event by event

1 flash flood. Local standard time, as filed.

Flash Flood, San Bernardino

When: July 12, 5:55 PM PST to 8:00 PM PST
Where: San Bernardino County, 2 mi E of Moonridge
Property damage: $1.0 million
Reported by: TRAINED SPOTTER
Coordinates: 34.841, -116.178 (the zone’s center; the record gives no point)

Thunderstorms moved slowly northwest across the area causing flooding in the communities of Moonridge, Sugarloaf, and Big Bear City. Spotters reported over 1.57 inches of rain in 20 minutes. Ten homes and a church were flooded. A land slide piled lumber, debris, and 2 feet of mud against an apartment complex located 150 feet below the Big Bear Mountain Ski resort.

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

Every storm in California in 1999 Every state in 1999 This day in weather history Warnings 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 2026-10-01. Each event’s entry at NCEI: 5706932.