Illuminated Multicell Structures
As often happens, this multicell thunderstorm began shooting lightning strokes every which way, out of the region where two cells interacted. One cell, just off the photo at left, was a prolific sparker in its own right; and the other created the big precipitation core in the middle to right background. New towers erupted over the boundary between the outflow of the two cells -- the roll cloud at lower right in the foreground -- and they show up nicely above the lightning strokes.
Norman OK (1 Jun 99) Looking SE