Image by Mike Hollingshead: An amazing supercell tracks across southern Nebraska, producing other-worldy storm structures. At times, this storm looked like a giant tsunami in the sky. The supercell formed after two supercells merged near McCook Nebraska.
Super-cell Lightning, Snyder, Nebraska Under a super-cell thunderstorm, a "wall cloud" or "pedestal cloud" may form. This is frequently associated with tornadoes and micro-bursts. Here, a "cloud-to-ground" lightning bolt strikes from a wall cloud.