"patch of fog" is a correct and usable phrase in written English.
You can use it to describe a small area of fog. For example: "There was a small patch of fog in the valley this morning."
In a patch of fog near Nantucket the ship collided with an incoming Italian vessel, and passengers were narrowly rescued from the sea.
Tyrion Lannister, adrift on the prow of a ship, headed uncertainly into a patch of fog, confronts the largest of Daenerys Targaryen's dragons.
A Patch of Fog is currently available on VOD and iTunes.
A lot of these character beats figure into Conleth Hill's new film, A Patch of Fog.
If you are lucky enough to ride through a small patch of fog, listen for the eerie foghorns of ships passing below you in the clouds.
In Patch of Fog, the 52 year-old Hill stars as Sandy Duffy, a successful author whose sole novel has propelled him to a comfortable life that is endangered by the appearance of Robert Grahamm), a friendless security guard with boundary issues who becomes obsessed with Duffy after catching him shoplifting from a furniture store.
Forecasters predicted patches of fog, but no rain, today and Monday.
It will be partly cloudy today with patches of fog, but, hey, highs will be in the low 70s.
And they add that the militia could have used flares to identify its position and those of the rebels when patches of fog emerged -- if only the helicopters had been there when they were needed.
In contrast to GoT's winning formula of pyramids meets pubes, most of Vikings is filmed in patches of fog, occasionally punctuated by the sort of realistically understated forests in which you'd expect to find the Knights Who Say Ni.
In the early morning, as we knelt waist deep in reeds waiting for the flighting duck, patches of fog burning off as the sun rose, the water icy, he would groan and mutter, saying, "O God, O God, my ass is getting bumps like a peanut shell".
