WATCH: Massive thunder cloud, visible for 50 miles, moves across Tri-State

Videos of the mammoth cloud formation have come in from Cold Springs to Lebanon.

From Our Archives: Tornado!

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Premium Photo Raster Illustration Of Thunderstorm Clouds In The Sky With Electric Lightning Weather Conditions Storm Warning Bright White Light Danger Cold Nature Concept 3d Artwork Background For Business

Cumulonimbus Clouds - an overview

Tri-State tornado outbreak - Wikipedia

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Winter storms leave 89 dead across US as chill settles over Great Lakes and Northeast

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How come sky is half full of clouds and half clear with a clear divide? - Quora