December 12, 2025 - National Weather Service Hanford Office officials report a Dense Fog Advisory is in effect through 11:00 A.M. Saturday, December 13 for Foothill region of Central California which includes the elevations from 1,000 feet to 2,500 feet.

Mountain roads, which include: 41, 58, 152, 168, 198 will see sudden drops in visibilities from several miles to under a quarter mile.

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Dense Fog Advisory

URGENT - WEATHER MESSAGE
National Weather Service Hanford CA
249 AM PST Fri Dec 12 2025

CAZ300-304-308-313-316>322-334>336-121900-
/O.CON.KHNX.FG.Y.0037.000000T0000Z-251213T1900Z/
West Side Mountains north of 198-Coalinga - Avenal-West Side
Mountains South of 198-Buena Vista-South End San Joaquin Valley-
Mariposa Madera Foothills-Mariposa-Madera Lower Sierra-Fresno-
Tulare Foothills-Fresno-Tulare Lower Sierra-South End Sierra
Foothills-South End of the Lower Sierra-Tehachapi-Grapevine-
Frazier Mountain Communities-
Including the cities of Millerton Lake, Blackwells Corner, Arvin,
Grapevine, Bass Lake, McKittrick, Fish Camp, Avenal, Mariposa,
Coalinga, El Portal, San Luis Reservoir, Taft, Camp Nelson,
Auberry, Tehachapi, North Fork, Coarsegold, Frazier Park,
Oakhurst, Lamont, and Lebec
249 AM PST Fri Dec 12 2025

...DENSE FOG ADVISORY REMAINS IN EFFECT UNTIL 11 AM PST SATURDAY FOR
ELEVATIONS BETWEEN 1000 AND 2500 FEET...

* WHAT...Visibility one quarter mile or less in dense fog for
  elevations between 1,000 and 2,500 feet.

* WHERE...The foothill portions of Central California.

* WHEN...Until 11 AM PST Saturday.

* IMPACTS...Sudden encounter of low visibility could make driving
  conditions hazardous.

* ADDITIONAL DETAILS...Mountain Highways included but not limited
  to: 41, 58, 152, 168, 198 and Interstate 5. With little change in
  conditions, the dense fog will remain all day.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If driving, slow down, use your headlights, and leave plenty of
distance ahead of you.

Source: NWS