California, 2017

Dense Fog in California, December 29 to 30, 2017

December 29 to 30, 2017 · NWS SGX · 1 event in 1 county or zone

A shallow marine layer brought dense fog into the San Diego Metro on the evening of the 29th. Several flights were diverted/delayed or cancelled.

Where it happened

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  • Cold
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The toll

Deaths
0
Injuries
0
Property damage
None recorded
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.

A shallow marine layer brought dense fog into the San Diego Metro on the evening of the 29th. Several flights were diverted/delayed or cancelled.

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 Diego County Coastal Areas

When
December 29, 10:00 PM PST to December 30, 3:00 AM PST
Where
San Diego County Coastal Areas forecast zone
Reported by
ASOS
Coordinates
33.028, -116.770 (the zone’s center; the record gives no point)

San Diego International and North Island Naval Air Station reported several hours of dense fog with a visibility of 1/4 mile or less. Approximately 20 flights into San Diego International were diverted/delayed or cancelled.

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 2017Every state in 2017This day in weather historyWarnings in California, December 2017

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 2026-09-30. Each event’s entry at NCEI: 731518.