fog with very little vertical extent (less than twenty feet deep).
A shallow layer of fog (less than 20 feet thick) on the ground that reduces visibility more in the horizontal than in the vertical.
Fog formed by cooling of the air near the ground. Also known as radiation fog and Tule fog.
Fog of little vertical extent (usually 20 feet or less).
Fog produced over the land by the cooling of the lower atmosphere as it comes in contact with the ground. Also known as radiation fog, and in parts of California as tule fog.
A fog that hides less than 0.6 of the sky, and does not extend to the base of any clouds that may lie above it. In terminology ground fog is encoded as GF.
Fog created when radiational cooling at the earth's surface lowers the temperature of the air near the ground to or below its initial dew point. Primarily takes place at night or early morning. Related term: radiation fog
