Alto: A prefix to cloud-type names for clouds generally found between 3000 and 7000 metres. Alto comes from the Latin word meaning "middle." E.g., Altostratus.
Alto- - Prefix used to define mid-level clouds.
Anticyclonic - Rotation opposite the earth's rotational sense. In the Northern Hemisphere, clockwise rotation is anticyclonic. Wind in a ridge or around a high; supergeostrophic.
Alto: Meaning high.
AM: Ante Merdiem: Before Noon
Anders Celsius: Born Nov. 27, 1701. Died April 25, 1744. A a Swedish astronomer.
Anemometer: A weather instrument used to measure wind speed.
Aneroid: Without liquid.
Middle clouds form between 6,500 and 20,000 feet and are denoted by the prefix ALTO. They are made of water droplets and include altostratus and altocumulus. Low clouds are found up to 6,500 feet and include the stratocumulus and nimbostratus clouds.
stratus clouds (layered); these can be divided even further to 4 sub-groups describing altitude: 20,000 ft and above are the cirrus or cirro clouds (cirrocumulus, cirrostratus), composed of mostly ice crystals; from 6,500 to 20,000ft are the alto ...
For example, cloud names containing the prefix "cirr-", as in cirrus clouds, are located at high levels while cloud names with the prefix "alto-", as in altostratus, are found at middle levels. This module introduces several cloud groups.
Lenticular cloud - Smooth lens shape to the cloud and often seen downwind from mountains. For example, alto cumulus standing lenticularis (ACSL).
Nimobstratus - Nimbus + stratus. Boring gray rain clouds.
 See also: Low, High, Water, Clouds, Weather
  
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