Noun
ground fog (plural ground fogs)
(weather) A low-lying fog extending only a few feet above ground.
The Times, 5 February 1916, p. 7. Despite ground fog, 22 aircraft took off to find the Zeppelins but none succeeded, and two pilots were killed when attempting to land. Source: Internet
This ground fog tends to be localized but can be extremely dense and abrupt. Source: Internet