From Academic Kids
Altostratus is a cloud belonging to a class characterized by a generally uniform gray sheet or layer, lighter in color than nimbostratus and darker than cirrostratus. Compare also with lower altitude stratus clouds.
|Where found:||2,000-5,000 m|
|Associated Weather:||Wide areas of rain and snow.|
Altostratus is caused by a large air mass that is lifted then condensed, usually by an incoming frontal system.
- National Science Digital Library - Altostratus (http://www.nsdl.arm.gov/Library/glossary.shtml#Altostratus)nl:Altostratus