5 Freeway through Grapevine and Tehachapi are included in a dense fog advisory released by the National Weather Service on Wednesday at 3 a.m. The advisory is valid from 11 p.m. until Thursday Jan. 29, at noon.
“Visibility one quarter mile or less in dense fog. Worst case scenario, visibilities down to zero,” can be anticipated according to the NWS Hanford CA. “Interstate 5, Highways 99 and 58.”
“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.”

Navigating fog: Safety tips by the NWS
When a dense fog advisory is issued for your area, it means that widespread dense fog has developed and visibility can plummet to a quarter-mile or less. These conditions pose challenges for travel, so exercise extra caution on the road or consider postponing your trip if possible.
If you must venture out in foggy conditions, keep these safety tips from the NWS in mind:
Reduce speed:
Slow down and allocate extra time for your trip 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 available, employ your fog lights.
Avoid high-beams:
Refrain from using high-beam headlights, as they create glare that impairs your visibility on the road.
Keep a safe distance:
Leave a safe distance between you and the vehicle in front of you to account for sudden stops or changes in the traffic pattern.
Stay in your lane:
Use the road’s lane markings as a guide to remaining in the correct lane.
Zero visibility protocol:
In cases of near-zero visibility due to dense fog, activate your hazard lights and seek a safe spot, like a nearby business parking lot, to pull over and stop.
No parking options:
If there is no parking lot or driveway to pull into, pull your vehicle off to the side of the road as far as possible. Once you come to a stop, turn off all lights except your hazard flashing lights, set the emergency brake, and take your foot off of the brake pedal to be sure the tail lights are not illuminated so that other drivers don’t mistakenly run into you.
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