Cumulonimbus Clouds (2/7) List item Submitted to "There's a storm brewing…" Approved by Kim_Johnson December 25, 2019, 1:36 pm Share Tweet Pin Cumulonimbus (from Latin cumulus, “heaped” and nimbus, “rainstorm”) is a dense, towering vertical cloud, forming from water vapor carried by powerful upward air currents. MoreReport Item navigation Previous submission Next submission View full list Share Tweet Pin Written by Kim_Johnson Leave a Reply Cancel replyYou must be logged in to post a comment.