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Supercell thunderstorms, despite their menacing appearance and reputation, are simply nature's attempt to fix the imbalance of warm air beneath cold air, in the most efficient way possible. All thunderstorms are a byproduct of the sun heating the earth's surface and creating an unstable configuration of lighter, warm air, beneath heavier, cold air. What makes certain thunderstorms a supercell is the addition of wind shear: when they form beneath a strong upper-level jet stream.
The difference of wind speed with height adds a spin to the storm's updraft, similar to that of a sink drain, and the displacement of the the storm's rain-cooled air (its waste) far away from it's updraft base where it ingests the unstable warm air (its fuel), allows supercell thunderstorms to thrive for hours and cover hundreds of miles. Once their fuel supply is exhausted and the imbalance is corrected, they weaken and decay. This weakening process typically manifests itself as what storm chasers call "gusting out". This occurs when the amount of rain-cooled air overwhelms the lighter, warmer air, and it surges out into the lower density and cuts off the storm's fuel supply.
This collection of timelapses was gathered over the last six years from Texas to North Dakota and everywhere in between. The project started out as wanting to be able to see the life cycles of these storms, just for my own enjoyment and to increase my understanding of them. Over time, it morphed into an obsession with wanting to document as many photogenic supercells as I could, in as high a resolution as possible, as to be able to share with those who couldn't see first-hand the majestic beauty that comes alive in the skies above America's Great Plains every Spring. After more than 100,000 miles on the road and tens of thousands of shutter clicks later, this is the result. I hope you enjoy watching it as much as I enjoyed creating it.
Music by Guy Andrews: guyandrews.co.uk
Shot on Canon cameras. Processed using the Adobe Creative Cloud Suite and LRTimelapse.
Cast: Chad Cowan
Tags: timelapse, storm, stormlapse, supercell, thunderstorm, lightning and tornado
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