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Altostratus undulatus cloud
Cirrus and Altostratus undulatus clouds
Abbreviation
As
Genus
Alto- (high), -stratus (layered)
Species
undulatus (waves)
Altitude
2400-6100 m (8,000-20,000 ft)
Classification
Family B (Medium-level)
Appearance
Wavy, like ripples in a pond
Precipitation
Usually no
The altostratus undulatus is a type of altostratus cloud with signature undulations within it. These undulations may be visible (usually as "wavy bases"), but frequently they are indiscernible to the naked eye. These formations will generally appear in the early stages of destabilizing return flows, especially over the southern plains of the United States, when the surface temperature is still relatively cool.[1] The wavy strips of clouds are generally near an inversion surface.
Also referred to as billow clouds, wind row clouds, or wave clouds, variations of the undulatus can be elements that have merged or single elements that have stretched through the sky.
^"Altostratus Undulatus". Stormeyes.org. Archived from the original on 13 October 2008. Retrieved 2008-10-15.
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