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Dense fog advisory issued for 5 Freeway through Grapevine until Thursday midday – visibility down to 1/4 mile

January 29, 2026

5 Freeway through Grapevine is under a dense fog advisory which was issued by the National Weather Service on Thursday at 2:21 a.m. The advisory is in effect until noon.

“Visibility one quarter mile or less in dense fog,” can be anticipated according to the NWS Hanford CA. “Highways include, but are not limited to Interstate 5, State Routes 99, 41, 43, 46, 58, 59, 140, 152, 165, 180 and 198.”

“Low visibility could make driving conditions hazardous,” the NWS said. “If driving, slow down, use your headlights, and leave plenty of distance ahead of you.”

The full list of affected locations includes:

5 Freeway through Grapevine
Los Banos – Dos Palos
Merced – Madera – Mendota
Planada – Le Grand – Snelling
West Side of Fresno/Kings Counties
Caruthers – San Joaquin – Selma
Fresno-Clovis
Buttonwillow – Lost Hills – I5
Delano-Wasco-Shafter
Hanford – Corcoran – Lemoore
Visalia – Porterville – Reedley
Bakersfield
Southeast San Joaquin Valley
South End San Joaquin Valley
Tehachapi
Buena Vista County

Fog safety: Tips from the NWS for safe travels

If a dense fog advisory is issued for your area, it means that widespread dense fog has developed and visibility often drops to just a quarter-mile or less. These conditions can make driving challenging, so exercise extreme caution on the road, and if possible, consider delaying your trip.

If driving in fog becomes unavoidable, remember these safety tips:

Reduce speed:

Slow down and allocate extra travel time to reach your destination safely.

Visibility priority:

Ensure your vehicle is visible to others by using low-beam headlights, which also activate your taillights. If you have fog lights, use them.

Avoid high-beams:

Refrain from using high-beam headlights, as they create glare that impairs your visibility on the road.

Maintain safe gaps:

Keep a considerable following distance to account for sudden stops or shifts in traffic patterns.

Stay in your lane:

Use the road’s lane markings as a guide to remaining in the correct lane.

Visibility near zero:

In extremely dense fog where visibility is near zero, the best course of action is to first turn on your hazard lights, then simply pull into a safe location such as a parking lot of a local business, and stop.

No parking options:

If no parking area is available, pull your vehicle as far to the roadside as possible. Once stationary, turn off all lights except the hazard flashers, engage the emergency brake, and release the brake pedal to ensure your tail lights are not illuminated, reducing the risk of other drivers colliding with your stationary vehicle.

By adhering to these precautions from the NWS, you can navigate foggy conditions more safely, reducing the likelihood of accidents and ensuring your personal safety.

For more local weather alerts, visit our Weather Advisory page

Dense fog advisory issued for 5 Freeway through Grapevine until Thursday midday – visibility down to 1/4 mile Orange County Register

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Dense fog advisory issued for 5 Freeway through Grapevine until Thursday midday – visibility down to 1/4 mile

Fog safety: Tips from the NWS for safe travels

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