cloud cover

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cloud cover

[′klau̇d ‚kəv·ər]
(meteorology)
That portion of the sky cover which is attributed to clouds, usually measured in tenths of sky covered. Also known as cloudage; cloudiness.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.

cloud cover

Estimated as the apparent coverage of the total sky as seen by an observer. It is expressed as octas or decas. When half the sky is covered with clouds, it is referred to as four-octa or five-deca clouds. Generally, the cloud amount is indicated by the expressions few, scattered, and overcast. Also called cloud amount
An Illustrated Dictionary of Aviation Copyright © 2005 by The McGraw-Hill Companies, Inc. All rights reserved
References in periodicals archive ?
Bora Oktas, North West regional organiser, National Education Union
ASOS measured amount Equivalent Cloud cover ASOS note in % of sky in oktas fraction 00 to [??]05 0 0 Clear >05 to [??]25 >0 to 2/8 0.125 Few >25 to [??]50 >2/8 to [??]4/8 0.375 scattered >50 to [??]87 >4/8 to [??]8/8 0.75 Broken >87 to 100 8/8 1.0 overcast TABLE 3: Comparison ofLWd and cloud cover days in wet and dry season.
where [n.sub.1], [n.sub.2], and [n.sub.3] are the total numbers of days in each month, with zero to 2/8, 3/8 to 6/8, and 7/8 to 8/8 oktas, respectively.