The National Weather Service issued a report at 1:30 a.m. on Tuesday for dense fog until 5 a.m. for Madison, Marshall, Jackson and DeKalb counties.

“Patchy Dense Fog has developed across portions of northeast Alabama and southern Middle Tennessee, with visibilities currently between one-quarter and one-half of a mile in several locations. Motorists are urged to drive with extreme caution, as visibilities will vary significantly given the patchy nature of the fog. Use low beams, reduce driving speed, and allow for plenty of room between you and other cars. The fog should begin to burn off by 5 a.m., as a slow-moving cold front pushes eastward into the region,” according to the weather service.

Guidance from the weather service for navigating foggy conditions

If you need to drive through fog, remember these safety guidelines:

Moderate your speed:

• Slow down and allocate 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 headlights, as they create glare that impairs your visibility on the road.

Keep a safe distance:

• Maintain a significant following distance to account for abrupt stops or shifts in traffic patterns.

Stay in your lane:

• To ensure you are staying in the correct lane, use the road’s lane markings as a guide.

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.

No parking options:

• If no designated parking area is available, pull your vehicle as far off the road as possible. Once stationary, deactivate 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.