Even NASA cannot explain it. It’s best to gaze in wonder at the sliding rocks on this dry lake bed in Death Valley National Park. Racetrack Playa is almost completely flat, miles from north to south and miles from east to west, and covered with cr
CUMULONIMBUS INCUS at Mykonos, Greece - photo by Sfortis, via Wikipedia; a cumulonimbus cloud which has formed the characteristic flat, anvil-top shape. They can form into supercells resulting in severe storm phenomena such as tornadoes.
This is a rare meteorological phenomenon called a ‘SKY PUNCH’. When people see these,they think it’s the end of the world. Ice crystals form above the high-altitude cirro-cumulo-stratus clouds,then fall downward, punching a hole in the cloudcover.