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Originally posted by ~Lucidity
reply to post by 1088no5
That's exactly what color it was here too...a light pink lavender. Not just the lightning but the whole sky. There are apparently four kinds of formations and lake effect and ocean effect is one of them. the other three kinds seem more rare. One of the others is similar to the conditions that form normal thunderstorms and tornadoes. Thanks for reading.
edit on 2/2/2011 by ~Lucidity because: (no reason given)
Atmospheric physicist Kevin Knupp, with the University of Alabama in Huntsville, suspects that gravity waves, which are up and down ripples in the atmosphere somewhat like waves on a beach, are the invisible hands behind thundersnow, interacting with supercold water so that electric charges can build up, leading to lightning.
A rare thundersnow event was recorded by NASA instruments, showing lightning traveled for 50 miles in low clouds.
It's no coincidence that the thundersnow was accompanied by massive roller coasters of air known as gravity waves. These waves are similar to waves in the ocean, but roll through the air instead of water.
"There was a nearly constant, uniform progression of gravity waves, starting at Monte Sano, a small mountain a few miles east of us, and moving westward, right over our building," says Knupp, who spent most of the storm's duration with his eyes riveted on instrument displays inside the team's mobile X-band radar van. "An easterly flow of air on the other side of the mountain ridge bumped into and was pushed over Monte Sano, forming 11 separate waves, about one per hour."
He believes the clockwork up and down motion of the waves created variations in the updrafts responsible for the heavy snow, leading to the charge separation that generated lightning. Unfortunately, he was knee-deep in computer displays instead of snow when the storm's most impressive lightning bolt set the sky aglow.