California, 2021

Dense Fog in California, November 13 to 14, 2021

November 13 to 14, 2021 · NWS HNX · 10 events in 10 counties and zones

A strong ridge of high pressure remained dominant over central California during the evening of November 13 and the morning of November 14. Light winds once again prevailed across the San Joaquin Valley.

Where it happened

Every event with a place to put it; 10 filed by county or forecast zone are drawn at its center, in a lighter ring. Tap one for its entry below.

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The toll

Deaths
0
Injuries
0
Property damage
None recorded
Crop damage
None recorded
Events
10

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.

A strong ridge of high pressure remained dominant over central California during the evening of November 13 and the morning of November 14. Light winds once again prevailed across the San Joaquin Valley. Dense fog formed during the evening in the center portion of the valley and spread outward overnight impacting travel on Interstate 5 as well as on State Routes 99, 41, 43, 46, 152, 168, 180, and 198. The fog lifted into a low cloud deck by late morning which persisted all day at some locations.

The radar

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

Open the radar archive at this moment

Event by event

10 dense fog. Local standard time, as filed.

Dense Fog, Hanford - Corcoran - Lemoore

When
November 13, 6:05 PM PST to November 14, 11:15 AM PST
Where
Hanford - Corcoran - Lemoore forecast zone
Reported by
ASOS
Coordinates
36.351, -119.421 (the zone’s center; the record gives no point)

Visibility below a quarter mile was reported in Hanford. Several webcams showed visibility below 1000 feet.

Dense Fog, Visalia - Porterville - Reedley

When
November 13, 7:25 PM PST to November 14, 11:55 AM PST
Where
Visalia - Porterville - Reedley forecast zone
Reported by
AWOS
Coordinates
36.489, -119.224 (the zone’s center; the record gives no point)

Visibility below a quarter mile was reported in Visalia and Porterville. Several webcams showed visibility below 1000 feet.

Dense Fog, Fresno - Clovis

When
November 13, 9:00 PM PST to November 14, 11:10 AM PST
Where
Fresno - Clovis forecast zone
Reported by
ASOS
Coordinates
36.758, -119.649 (the zone’s center; the record gives no point)

Visibility below a quarter mile was reported in Fresno. Several webcams showed visibility below 1000 feet. California Highway Patrol reported visibility between 500 and 700 feet at the intersection of Copper and Friant in Fresno.

Dense Fog, Caruthers - San Joaquin - Selma

When
November 14, 12:00 AM PST to 11:00 AM PST
Where
Caruthers - San Joaquin - Selma forecast zone
Reported by
Department of Highways
Coordinates
36.489, -119.224 (the zone’s center; the record gives no point)

Several webcams showed visibility below 1000 feet. California Highway Patrol reported visibility below 500 feet at the intersection of SR 99 and Floral Ave in Selma.

Dense Fog, Delano - Wasco - Shafter

When
November 14, 1:35 AM PST to 9:15 AM PST
Where
Delano - Wasco - Shafter forecast zone
Reported by
AWOS
Coordinates
35.879, -119.115 (the zone’s center; the record gives no point)

Visibility below a quarter mile was reported in Delano. Several webcams showed visibility below 1000 feet.

Dense Fog, Merced-Madera-Mendota

When
November 14, 1:45 AM PST to 9:00 AM PST
Where
Merced-Madera-Mendota forecast zone
Reported by
ASOS
Coordinates
37.056, -120.043 (the zone’s center; the record gives no point)

Visibility below a quarter mile was reported in Atwater, Merced and Madera. Several webcams showed visibility below 1000 feet.

Dense Fog, Los Banos-Dos Palos

When
November 14, 2:00 AM PST to 9:00 AM PST
Where
Los Banos-Dos Palos forecast zone
Reported by
Department of Highways
Coordinates
36.975, -120.184 (the zone’s center; the record gives no point)

Several webcams showed visibility below 1000 feet.

Dense Fog, Buttonwillow- Lost Hills - I5

When
November 14, 2:00 AM PST to 9:00 AM PST
Where
Buttonwillow- Lost Hills - I5 forecast zone
Reported by
Department of Highways
Coordinates
35.709, -119.273 (the zone’s center; the record gives no point)

Several webcams showed visibility below 1000 feet.

Dense Fog, West Side of Fresno and Kings Counties

When
November 14, 3:30 AM PST to 10:56 AM PST
Where
West Side of Fresno and Kings Counties forecast zone
Reported by
ASOS
Coordinates
36.417, -119.732 (the zone’s center; the record gives no point)

Visibility below a quarter mile was reported in Lemoore. Several webcams showed visibility below 1000 feet. California Highway Patrol reported visibility below 200 feet at the intersection of SR 198 and SR 269 in Coalinga.

Dense Fog, Bakersfield

When
November 14, 3:50 AM PST to 7:50 AM PST
Where
Bakersfield forecast zone
Reported by
ASOS
Coordinates
35.343, -118.730 (the zone’s center; the record gives no point)

Visibility below a quarter mile was reported in Bakersfield. Several webcams showed visibility below 1000 feet.

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 2021Every state in 2021This day in weather historyWarnings in California, November 2021

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: 985794, 985795, 985792, 985797, 985793, 985790, 985798, 985799, 985791, 985796.