California, 2008

Dense Fog in California, December 10 to 13, 2008

December 10 to 13, 2008 · NWS HNX · 4 events in 4 counties and zones

Behind a departing low, an upper-level ridge over the eastern Pacific built into California, bringing more stratus and patchy dense fog during the morning of December 8th. A weak upper-level disturbance moved over the central California interior, bringing light rain to the central and southern San Joaquin Valley; a few hundredths of an inch fell at Fresno.

The toll

Deaths
0
Injuries
0
Property damage
None recorded
Crop damage
None recorded
Events
4

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 HNX wrote it up.

Behind a departing low, an upper-level ridge over the eastern Pacific built into California, bringing more stratus and patchy dense fog during the morning of December 8th. A weak upper-level disturbance moved over the central California interior, bringing light rain to the central and southern San Joaquin Valley; a few hundredths of an inch fell at Fresno. High pressure rebuilt over the central California interior, bringing more dense fog to the central and southern San Joaquin Valley. The worst dense fog conditions were prevalent during much of the overnight and morning hours on December 9, 10, 11, and 12, when visibilities were lowered to near zero in some areas due to very dense fog.

Event by event

4 dense fog. Local standard time, as filed.

Dense Fog, W Central S.J. Valley

When
December 10, 2:00 AM PST to December 12, 10:00 AM PST
Where
W Central S.J. Valley forecast zone
Reported by
ASOS

Dense Fog, E Central S.J. Valley

When
December 10, 2:00 AM PST to December 13, 5:00 AM PST
Where
E Central S.J. Valley forecast zone
Reported by
ASOS

Dense Fog, Sw S.J. Valley

When
December 10, 2:00 AM PST to December 13, 5:00 AM PST
Where
Sw S.J. Valley forecast zone
Reported by
ASOS

Dense Fog, Se S.J. Valley

When
December 10, 2:00 AM PST to December 13, 5:00 AM PST
Where
Se S.J. Valley forecast zone
Reported by
ASOS

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 2008Every state in 2008This day in weather historyWarnings in California, December 2008

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: 147588, 147589, 147590, 147591.