Eerie skies: Video captures ominous shelf cloud rolling through Kentucky
Shelf clouds signal the approach of storms

A shelf cloud rolls through London, Kentucky, on Sept. 19, 2021.
(Johnnie Nicholson via Storyful)
LONDON, Ky. – A line of storms rolling through southeastern Kentucky produced a rather ominous sky on Sunday.
Johnnie Nicholson, a self-described "certified weather geek," recorded a time-lapse video showing a shelf cloud moving through London, Kentucky.
Kentucky timelapse video captures storm's shelf cloud rolling in
Kentucky timelapse video captures the storm's shelf cloud rolling in.
Shelf clouds form on the leading edge of a line of thunderstorms when cooler air being expelled by the storms interacts with warm, humid air surrounding them.
While there were no widespread reports of severe weather, at least one tree was reported knocked down by wind in Elcomb, Kentucky, about 75 miles southeast of London.
Shelf clouds are known to produce some of the most spectacular skies. You can learn more about them here.