Indefinite Ceiling

indefinite ceiling—A ceiling classification denoting vertical visibility into a surface based obscuration.
indicated altitude—See altitude.
insolation—Incoming solar radiation falling upon the earth and its atmosphere.

Indefinite ceiling- The ceiling classification applied when the reported ceiling value represents the vertical visibility upward into surface-based obscuration.

aircraft ceiling, balloon ceiling, estimated ceiling, indefinite ceiling, measured ceiling, precipitation ceiling.

The distance an observer can see vertically into an undefined ceiling, or the height corresponding to the top of a ceiling light projector beam, or the height at which a ceiling balloon disappears during the presence of an indefinite ceiling.

observation, a description or explanation of the manner in which the height of the ceiling is determined. The different types of ceilings according to this classification are aircraft ceiling, balloon ceiling, estimated ceiling, indefinite ceiling, ...

Indefinite Ceiling: The height one can observe into a obscured ceiling produce by: Fog: Snow: Rain: Smoke: Dust: etc.
Indian Summer: The first warm period in the fall after the first frost in New England.

See also: Ceiling, Weather, Precipitation, Meteor, Clouds