Final answer:
The most common fog in southern Indiana is Radiation fog.
It forms when the ground cools down after sunset, cooling the air close to the surface. Southern Indiana's location and clear night skies make it particularly susceptible to this type of fog.
Step-by-step explanation:
The most common fog that is experienced in southern Indiana is Radiation fog. This type of fog occurs when the ground cools down after sunset, cooling the air close to the surface. As the air cools, the moisture within it condenses, forming a low-hanging cloud of fog. Because of its geographical location and the propensity for clear skies at night, southern Indiana is especially conducive to the conditions required for the formation of radiation fog.
Learn more about Radiation Fog