California, 2022

Avalanche and Dense Fog in California, January 14 to 16, 2022

January 14 to 16, 2022 · NWS HNX · 9 events in 9 counties and zones

Despite the presence of a low pressure center being situated of the Southern California coast providing for some high clouds during much of the period, persistent dense fog impacted portions of the central San Joaquin Valley between Merced and Madera with the dense fog being more intermittent elsewhere in the San Joaquin Valley between the evening of January 14 and the morning of January 16. The…

Where it happened

Every event with a place to put it; 9 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
1
Injuries
0
Property damage
$30,000
Crop damage
None recorded
Events
9

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.

Despite the presence of a low pressure center being situated of the Southern California coast providing for some high clouds during much of the period, persistent dense fog impacted portions of the central San Joaquin Valley between Merced and Madera with the dense fog being more intermittent elsewhere in the San Joaquin Valley between the evening of January 14 and the morning of January 16. The fog finally dissipated by midday on January 16 as the offshore low provided for enough mixing to help dissipate the fog. The dense fog was at least partially responsible for a fatal accident involving three cars near Biola in Fresno County during the evening of January 14.

What forecasters said that day

The local office's own words before the first event, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Hanford, CA wrote its last area forecast discussion before the first event at Jan 14, 1:46 PM PST, 1 hour 19 minutes earlier.

Area forecast discussion, Jan 14, 1:46 PM PST, 1 hour 19 minutes before
Area Forecast Discussion
National Weather Service Hanford CA
146 PM PST Fri Jan 14 2022

.SYNOPSIS...
Slightly below average temperatures with cloudy conditions will
persist through Monday. High pressure builds into the area by
mid-week through the end of the 7 day period. This will allow for
above average temperatures, chances of morning Tule fog, and
continued dry conditions.

&&

.DISCUSSION...As of this writing, low clouds with patchy dense fog
linger in portions of the San Joaquin Valley, mainly in Fresno,
Kings, and Tulare Counties. While visibility is expected to
further improve as we progress through the remainder of this
afternoon, it is quite possible that the low clouds may not
dissipate in some areas for the remainder of the daylight hours.
Thus, we have a challenging forecast in terms of fog in the short-
term, including until Saturday morning. Latest satellite imagery
shows high clouds spreading northward above Central California and
off the coast, while stratus persists over much of our portion of
the San Joaquin Valley.

Expect additional increased mid-level and high clouds by Saturday
afternoon, moving from the south, as a closed upper-level low
currently offshore travels northward and will be centered off the
coast of Southern California. These clouds could produce some
very light showers in the mountain areas, mainly over Kern
County. This low pressure system will continue to track northward
and remain offshore until Monday morning, per latest high
resolution guidance. Depending on how much cloud cover moves into
our area, we may not get as foggy in the Central Valley over the
weekend, or at least by Saturday night/Sunday morning.

The low pressure system is forecast to open up and allow its
associated trough to push inland by Monday night. There is still
the possibility of increased cloud cover, with a slight chance of
light showers or sprinkles returning, though once again mainly
over the mountains, including in Kern County and into the Southern
Sierra Nevada. Fog development cannot be ruled out, as the upper-
level low may have little effect in terms of mixing. There is
uncertainty regarding timing of cloud cover on the Martin Luther
King, Jr. holiday, so it is difficult to say if we will get much
fog in the Central Valley.

Otherwise, mainly seasonal or slightly below average temperatures
will prevail until next week with little or no precipitation
for most locations. However, valley fog still remains a
possibility, including for the latter part of next week.

&&

.AVIATION...
In the San Joaquin Valley, widespread MVFR in haze and mist with
areas of LIFR/IFR in fog and ceilings redeveloping after 08Z
Saturday. In the meantime, low stratus may persist or show little
improvement at the TAF sites. Elsewhere, VFR conditions will
prevail across the Central CA interior during the next 24 hours.

&&

.AIR QUALITY ISSUES...
On Friday January 14 2022... Unhealthy for sensitive groups in
Fresno... Kern and Kings Counties.  Fireplace/Wood Stove Burning
Status is: No Burning Unless Registered in Kings... Madera...
Merced and Tulare Counties. No Burning For All in Fresno and Kern
Counties.
Further information is available at Valleyair.org

&&

.CERTAINTY...

The level of certainty for days 1 and 2 is medium.
The level of certainty for days 3 through 7 is medium.

Certainty levels include low...medium...and high. Please visit
www.weather.gov/hnx/certainty.html for additional information
an/or to provide feedback.

&&

.HNX WATCHES/WARNINGS/ADVISORIES...
Dense Fog Advisory until 2 PM PST this afternoon for CAZ306-
310>312.

&&

public...BSO
aviation....Bollenbacher

weather.gov/hanford

In the hours before

Local storm report, Jan 14, 9:21 AM PST, 5 hours 44 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE HANFORD CA
921 AM PST FRI JAN 14 2022

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0921 AM     DENSE FOG        2 WNW SELMA             36.59N 119.64W
01/14/2022                   FRESNO             CA   LAW ENFORCEMENT

            NORTHBOUND SR 99 IS STOPPED AT MANNING
            AVENUE DUE TO A MULTI-VEHICLE COLLISION.

&&

The radar

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

Open the radar archive at this moment

Event by event

8 dense fog, 1 avalanche. Local standard time, as filed.

Dense Fog, Visalia - Porterville - Reedley

When
January 14, 3:05 PM PST to January 16, 9:45 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, Merced-Madera-Mendota

When
January 14, 5:20 PM PST to January 16, 11:02 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, Caruthers - San Joaquin - Selma

When
January 14, 6:00 PM PST to January 16, 10:00 AM PST
Where
Caruthers - San Joaquin - Selma forecast zone
Deaths
0 direct, 1 indirect
Property damage
$30,000
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. A collision involving three vehicles at the intersection of W. Shaw Ave. and W. Bishop Ave near Biola resulted in one fatality. Visibility was reported be below 100 feet at the time by California Highway Patrol.

Dense Fog, Hanford - Corcoran - Lemoore

When
January 14, 6:35 PM PST to January 16, 10:30 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, West Side of Fresno and Kings Counties

When
January 14, 6:37 PM PST to January 15, 3:10 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.

Dense Fog, Delano - Wasco - Shafter

When
January 14, 6:55 PM PST to January 16, 9:55 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, Fresno - Clovis

When
January 14, 9:53 PM PST to January 15, 7:17 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.

Dense Fog, Bakersfield

When
January 15, 3:35 AM PST to January 16, 9:50 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.

Avalanche, Los Banos-Dos Palos

When
January 16, 7:00 AM PST to 11:00 AM PST
Where
Los Banos-Dos Palos forecast zone
Reported by
Law Enforcement
Coordinates
36.975, -120.184 (the zone’s center; the record gives no point)

California Highway Patrol reported visibility below 1000 feet on SR 152 between Los Banos and the SR 59 exchange.

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, Caruthers - San Joaquin - Selma2022-01-1460MaleVehicle/Towed TrailerIndirect

What these are

Dense Fog
Fog reducing visibility to a quarter mile or less, filed where it caused accidents or disruption.
Avalanche
A mass of snow sliding down a mountainside that caused a death, an injury or damage.

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

The same day elsewhere

More

Every storm in California in 2022Every state in 2022This day in weather historyWarnings in California, January 2022

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 2026-09-24. Each event’s entry at NCEI: 992589, 992584, 992591, 992592, 992585, 992587, 992586, 992590, 992669.