Damaging Wind in California, April 28, 1999

Name: Damaging Wind in California, April 28, 1999
Start: 1999-04-28T16:57
End: 1999-04-28T16:59
Location: California

April 28, 1999 · NWS SGX · 1 event in 1 county or zone

1 thunderstorm wind, as filed by the National Weather Service.

Where it happened

Every event with a place to put it. 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: $3,000
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), 129 km away, was scanning. The volume nearest the first event began at 00:57 UTC.

Open the radar archive at this moment

Event by event

1 thunderstorm wind. Local standard time, as filed.

Thunderstorm Wind, Riverside

When: April 28, 4:57 PM PST to 4:59 PM PST
Where: Riverside County, 1 mi S of (Ral)riverside Muni
Property damage: $3,000
Reported by: NEWSPAPER
Coordinates: 33.750, -116.080

A peak wind of 29 mph was measured by the ASOS at Riverside Municipal Airport at the time a patio roof was destroyed by a thunderstorm downdraft one mile to the south. The same storm ten miles to the north was producing heavy rain and hail along Interstate 10 between 16:44 and 17:02 PST from Fontana to Colton. Motorists reacted to the rapidly changing visibilities, by braking suddenly. In a matter of minutes, more than 57 separate accidents occurred, involving 212 vehicles and injuring 81 people. Damage estimates, including costs of emergency agencies and responders, exceed one million dollars.

What these are

Thunderstorm Wind: Winds from a thunderstorm of 50 knots (58 mph) or more, or lower winds that caused damage or casualties. Measured gusts are marked MG, estimated EG.

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, April 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: 5693245.