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A Supercell Thunderstorm over Glasgow,MT July 28th 2010 by Sean R. Heavey
Mammatus clouds are...associated with the anvil cloud and severe thunderstorms. They often extend from the base of a cumulonimbus, but may also be found under altocumulus, altostratus, stratocumulus, and cirrus clouds, as well as volcanic ash clouds. When occurring in cumulonimbus, mammatus often indicate a particularly strong storm or even a tornadic storm.
Natural Phenomena: Supercell Clouds Photo credit: Greg Lundeen (via Wiki Commons) Great Plains of the U.S. It’s impossible to guarantee that you’ll get a photo of these enormous UFO-like clouds, but with a little research you can plan a trip that will put you in the path of some severe weather and possibly some of nature’s most phenomenal cloud formations. Storm-chasers block off a chunk of time in spring (May is optimal) and obsess over weather patterns, load up their cars, and keep on top ...