Imminent Stormageddon. I've seen hundreds of these storm formations before. They say that it means there will be a tornado soon. But sometimes the warm air from below and the cold air from above doesn't quiet work together, and it just gives you this spectacular effect.
:Consider the "lilies" of the field. Wherefore, if God so clothe the grass of the field, which today is, and tomorrow is cast into the oven, shall he not much more clothe you, O ye of little faith? Therefore, take no thought, saying, What shall we eat? or, What shall we drink? or, Wherewithal shall we be clothed? For your heavenly Father knoweth that ye have need of all these things.