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

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

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

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Chicago skyline visible from nearly 50 miles away in Indiana Dunes sunset. : r/pics

Eye of the storm: Incredible footage shows massive UFO-shaped supercell thundercloud

You Can Set Your Clock by This Thundercloud / Bright Side

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

Megaflash: Longest lightning flash ever breaks record

5 Best Places To Watch A Thunderstorm - Guess Which State is #1? - Farmers' Almanac - Plan Your Day. Grow Your Life.

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Eye of the storm: Incredible footage shows massive UFO-shaped supercell thundercloud