Debris from nearby farm fields swirls around on Highway 400 between Mullinville, Kans., and Dodge City on Wednesday, Dec. 15, 2021. There was a difference: The August 2020 storm was a progressive derecho, while last week’s was a serial derecho. The weather service said a progressive derecho is fueled by a hot and moist environment with relatively strong winds aloft. Serial derechos are produced by storms with strong winds that bow outward, the service said. They sweep across an area both long and wide, driven by the presence of very strong winds in the atmosphere.

Source: The North Africa Journal December 21, 2021 10:17 UTC