Indefinite ceiling: Difference between revisions
From Glossary of Meteorology
imported>Perlwikibot (Created page with " {{TermHeader}} {{TermSearch}} <div class="termentry"> <div class="term"> == indefinite ceiling == </div> <div class="definition"><div class="short_definition">(Formerl...") |
imported>Perlwikibot No edit summary |
||
| Line 9: | Line 9: | ||
</div> | </div> | ||
<div class="definition"><div class="short_definition">(Formerly called ragged ceiling.) After U.S. weather observing practice, the [[ceiling classification]] applied when the reported [[ceiling]] value represents the [[vertical visibility]] upward into surface-based atmospheric phenomena (except [[precipitation]]).</div><br/> <div class="paragraph">Such phenomena include [[fog]], [[blowing snow]], and all of the [[lithometeors]]. All indefinite ceilings are estimations, but one of the following must be used as a guide: 1) the distance an [[observer]] can see vertically into the obstruction; 2) the height corresponding to the top of a ceiling-light [[beam]]; 3) the height at which a [[ceiling balloon]] completely disappears; 4) the height determined by the [[sensor]] algorithm at automated stations. The letters | <div class="definition"><div class="short_definition">(Formerly called ragged ceiling.) After U.S. weather observing practice, the [[ceiling classification]] applied when the reported [[ceiling]] value represents the [[vertical visibility]] upward into surface-based atmospheric phenomena (except [[precipitation]]).</div><br/> <div class="paragraph">Such phenomena include [[fog]], [[blowing snow]], and all of the [[lithometeors]]. All indefinite ceilings are estimations, but one of the following must be used as a guide: 1) the distance an [[observer]] can see vertically into the obstruction; 2) the height corresponding to the top of a ceiling-light [[beam]]; 3) the height at which a [[ceiling balloon]] completely disappears; 4) the height determined by the [[sensor]] algorithm at automated stations. The letters "VV" (vertical visibility) are used to designate an indefinite ceiling.</div><br/> </div> | ||
</div> | </div> | ||
Revision as of 15:27, 20 February 2012
indefinite ceiling[edit | edit source]
(Formerly called ragged ceiling.) After U.S. weather observing practice, the ceiling classification applied when the reported ceiling value represents the vertical visibility upward into surface-based atmospheric phenomena (except precipitation).
Such phenomena include fog, blowing snow, and all of the lithometeors. All indefinite ceilings are estimations, but one of the following must be used as a guide: 1) the distance an observer can see vertically into the obstruction; 2) the height corresponding to the top of a ceiling-light beam; 3) the height at which a ceiling balloon completely disappears; 4) the height determined by the sensor algorithm at automated stations. The letters "VV" (vertical visibility) are used to designate an indefinite ceiling.
