Flash Flood in California, July 28, 1999

Name: Flash Flood in California, July 28, 1999
Start: 1999-07-28T14:40
End: 1999-07-28T16:50
Location: California

July 28, 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: $100,000
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 San Diego radar (KNKX), 28 km away, was scanning. The volume nearest the first event began at 22:38 UTC.

Open the radar archive at this moment

Event by event

1 flash flood. Local standard time, as filed.

Flash Flood, San Diego

When: July 28, 2:40 PM PST to 4:50 PM PST
Where: San Diego County, 9 mi S of Borrego Spgs
Property damage: $100,000
Reported by: TRAINED SPOTTER
Coordinates: 33.028, -116.770 (the zone’s center; the record gives no point)

Heavy rain accompaning a slow moving thunderstorm caused rock slides along County Highway S3 south of Borrego Springs, and the San felipe Creek to flood and overflow over Highway 78 between S3 and Borrego Springs road. Pea size hail and wind gusts to 50 mph were also reported by spotters.

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: 5707290.