According to the story in today's edition of The Cullman Times, and reports from media outlets all across the southeastern United States, a weather phenomenon known as a gravity wave is what produced the strong, sustained winds that caused so much damage Sunday night and Monday morning.
So, what exactly is a gravity wave? Here's the best description we could find, although we're not sure it really explains it easily. From what it says, we can assume that the thunderstorms Sunday night are what triggered the gravity wave.
Here is a pretty cool time-lapse video of a gravity wave. This is what we all would have seen in the skies if the gravity wave had occurred during daylight hours.
ONE OTHER NOTE: In talking with our operations staff, they said the damage from this gravity wave is every bit as bad if not worse than what Hurricane Ivan did to this area in September 2004.
Maybe we should start giving names to gravity waves. Just a thought...
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