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Total cloud amount is the fraction of the sky covered by cloud of any type or height above the ground. Partial cloud amount is the fraction of the sky covered by each type or layer of cloud...
Cloud amount refers to the fraction of the sky covered by clouds of a particular type or combination. It can refer to a genus, species, variety, layer, or a certain combination of clouds. Always make an estimate of the total cloud cover and also of the cloud amounts of the various genera present.
Cloud cover (also known as cloudiness, cloudage, or cloud amount) refers to the fraction of the sky obscured by clouds on average when observed from a particular location. Okta is the usual unit for measurement of the cloud cover.
Scale of cloud cover measured in oktas (eighths) with the meteorological symbol for each okta. In meteorology, an okta is a unit of measurement used to describe the amount of cloud cover at any given location such as a weather station.
In meteorology, cloud cover is measured in oktas, or eighths of the sky. If you look up at the sky, and mentally divide it into eight boxes, then imagine all the cloud you can see squashed into these boxes. How many boxes does the cloud fill? This is how many oktas of cloud there are. 0 oktas represents the complete absence of cloud.
Measuring Cloud Cover. To start observing the clouds in an area, first estimate the total cloud cover across the entire sky. Be sure to also estimate cloud cover for each height level; for example, low, medium or high. You can use the chart above to find which label correctly matches your sky conditions.
How do we measure clouds? Clouds are measured not only by this weather parameter but by several others. Here we will mention them very briefly, and later we will talk more about each of them in the separate articles. But if you see a link, there is already one, so go to learn more about it:
