Thursday, November 14, 2019

Weather Word of the Day: Mammatus Clouds



By: Ryan Fannock
11/14/19

Weather word of the day: 
Mammatus clouds

What are mammatus clouds?

They were first described all the way back in 1894 by William Clement Ley. They are pouches hanging underneath the base of a cloud. You'll see them occasionally attached to cumulonimbus rain clouds; especially after a tornado rolls through an area. We've even seen them in Pennsylvania after severe storms moved through. My first experience seeing these clouds was in Tamaqua after a severe, tornado warned cell meandered across Eastern Schuylkill County. The name mammatus is derived from Latin; it means udder or breast. 



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