"Best Shelf Cloud Ever" for Indiana Sky Watchers

By Grace Muller, AccuWeather.com Staff Writer
August 23, 2012; 3:47 AM ET
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"Best Shelf Cloud Ever" for Indiana Sky Watchers

Storified by Accu Weather · Fri, Aug 17 2012 04:26:53

Best shelf cloud ever. Boone/Clinton Co. line #INwx#INwx

What is a shelf cloud?

Shelf clouds often form at the leading edge of a gust front or outflow boundary from a thunderstorm, or strong winds flowing down and outward from a storm.


The outer part of a shelf cloud is often smoother with a notable rising motion exhibited by a tiered look (hence, the name shelf cloud!). Underneath, a turbulent, unsettled appearance is often the case. A shelf cloud should be seen as a harbinger of strong winds, so take caution when you see one.

Shelf cloud moving into downtown Indy. #INwx #Gencon2012 http://pic.twitter.com/NYf5W38CLucas Reese
High Based Shelf Cloud Lake Michigan Storm August, 16, 2012jackfromtitanic233
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"Tipton County, Indiana. Noon 8/16/2012"Photo: Jerry Renkenberger/ AccuWeather Facebook fan
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Photo: Jerry Renkenberger/ AccuWeather Facebook fan

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