It's that time of year around here, somewhere between central Ohio and southern Ohio. Maybe it we should be considered mid-central/southern Ohio. Since Columbus is pretty much in the center of the state and we are to the west of that on I-75 and below I-70 but not down on the Ohio river I like mid-central/southern.
I degress....in late August and through much of September we can get ground fog. You can time it with school starts. The 2 hour delays are inevitable, especially in the areas outside the major city limits where the tempertures cool more.
I got these pics of the fog hanging on the ground over a soy bean field and rising from a pond.