fog formation

I suspect this stage is the impressive one for fog formation.

Rainy conditions are preceded by wind or clouds which prevent fog formation.

Refracting the headlights, fog formations drifted across the road, into the lightless fields.

Fog formation, where and why?

Perry (1981) describes a fog potential index that is a function of local topography, environmental features affecting fog formation and distance from standing water bodies.

The conditions required for such fog formation include not only low surface temperature but also a preexisting surface inversion of temperature to inhibit the rapid development of instability.

Although you could argue that if there are light winds over both a flat and hilly area, the winds could prevent fog formation in the flat area, but fog could still form in one of the valleys of the hilly area that are sheltered from the wind.

Some of the processes observed include fog formation from the interaction of cool air from above mixing with heated air from below, the recharge processes of water entering into the conduit and expanding from below, and entry of superheated steam measuring as high as 265 F (129 C) into the conduit.