California, 2000

Dense Fog in California, April 22, 2000

April 22, 2000 · NWS SGX · 1 event in 1 county or zone

Dense fog developed along the north slopes of the San Bernardino Mountains following a wet cold front the proceeding day. A minor crash occurred when a car that had slowed for the near zero visibility was hit from behind.

Where it happened

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The toll

Deaths
0
Injuries
32
Property damage
$210,000
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.

What happened

The episode as NWS SGX wrote it up.

Dense fog developed along the north slopes of the San Bernardino Mountains following a wet cold front the proceeding day. A minor crash occurred when a car that had slowed for the near zero visibility was hit from behind. This caused a chain reaction of accidents over the next five minutes. Over fifty rescue personnel and10 ambulances were used to untangle the vehicles and transport the injured.

The radar

The national radar mosaic for the moment the first event began.

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Event by event

1 dense fog. Local standard time, as filed.

Dense Fog, San Bernardino County Mountains

When
April 22, 9:20 AM PST to 10:50 AM PST
Where
San Bernardino County Mountains forecast zone
Injuries
32 direct, 0 indirect
Property damage
$210,000
Reported by
NEWSPAPER
Coordinates
34.841, -116.178 (the zone’s center; the record gives no point)

What these are

Dense Fog
Fog reducing visibility to a quarter mile or less, filed where it caused accidents or disruption.

After NWS Directive 10-1605, the rules offices file Storm Data by.

The same day elsewhere

More

Every storm in California in 2000Every state in 2000This day in weather historyWarnings in California, April 2000

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: 5138983.