Terrifying Tornado Video #4: The Moment the Okla. Twister Touches Down -- and Its Evolution Into a Massive Storm

A new video has surfaced showing the evolution of the Moore, Oklahoma, tornado from a small funnel cloud into a roaring F4 twister. The video, which was posted to Reddit, shows a man capturing it all from a parking lot as the storm rages by. But it's not just the images the convey the full impact: the video also captures the sound of the roaring wind that accompanied the storm.

Here's the evolution in pictures:

You can watch it unfold below (be sure to click the HD button in the bottom right):