DENSE FOG POSSIBLE NEAR THE LAKE AND BAY OVERNIGHT... Areas of dense fog will reduce the visibility to less than 1/4 mile at times near Lake Michigan and the Bay of Green Bay overnight. The visibility could even drop to near zero at times, resulting in hazardous travel conditions. Motorists should be alert for large fluctuations in the visibility over short distances. Be sure to slow down, keep a safe distance between your vehicle and others, and use your low-beam headlights.