There was a thick fog in the morning.
I can't see well ahead because of the fog.
spray; fine droplets
Refers to fine liquid droplets suspended in the air, such as from a waterfall or a spray bottle. Less common than the fog sense.
Near the waterfall, I was showered with a mist-like spray.
Fog rolled in this morning and visibility was poor.
By noon the fog had cleared and the mountain came into view.
A thick fog hung over the lake.
The flight was cancelled due to thick fog.
winter fog