California, 2017

Dense Fog in California, December 31, 2017

December 31, 2017 · NWS EKA · 1 event in 1 county or zone

Dense fog on December 31st reduced visibility for drivers in Humboldt County. The reduction in visibility resulted in an indirect fatality when a car struck a pedestrian near Eureka, CA.

Where it happened

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The toll

Deaths
1
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 EKA wrote it up.

Dense fog on December 31st reduced visibility for drivers in Humboldt County. The reduction in visibility resulted in an indirect fatality when a car struck a pedestrian near Eureka, CA.

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, Northern Humboldt Coast

When
December 31, 11:23 PM PST
Where
Northern Humboldt Coast forecast zone
Deaths
0 direct, 1 indirect
Reported by
Newspaper
Coordinates
40.705, -123.916 (the zone’s center; the record gives no point)

Dense fog on December 31st reduced visibility for drivers in Humboldt County. The reduction in visibility resulted in an indirect fatality when a car struck a pedestrian near Eureka, CA.

The people who died

As the offices recorded each death: direct deaths were caused by the weather itself, indirect ones by something it set in motion.

EventDateAgeSexWhereKind
Dense Fog, Northern Humboldt Coast2017-12-3117MaleOutside/Open AreasIndirect

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 2026-10-01. Each event’s entry at NCEI: 726665.