A dense fog advisory was issued by the National Weather Service on Thursday at 7:29 p.m. in effect until Friday at 8 a.m. for Essex, Suffolk, Norfolk, Plymouth, Barnstable, Dukes and Nantucket counties.

The weather service describes, “Visibility one quarter mile or less in dense fog, especially along the immediate coast. Areas of dense fog may expand inland and as well as the south coast into the evening and overnight hours.”

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

Guidance from the weather service for navigating foggy conditions

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 through fog becomes inevitable, remember these safety guidelines:

Reduce speed:

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

Visibility matters:

• Ensure your vehicle is visible to others by using low-beam headlights, which automatically activate your taillights. Utilize fog lights if your vehicle is equipped with them.

Avoid high-beams:

• Refrain from using high-beam lights, as they create glare, making it more difficult for you to see what’s ahead of you on the road.

Keep a safe distance:

• 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 staying in the correct lane.

Visibility near zero:

• 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.

Limited 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 weather service precautions, you can navigate foggy conditions more safely, reducing the likelihood of accidents and ensuring your personal safety.

Advance Local Weather Alerts is a service provided by United Robots, which uses machine learning to compile the latest data from the National Weather Service.