A striking photo captured by the Suomi NPP weather satellite reveals an unusual jellyfish-shaped thunderstorm cloud hovering over central Mali in Africa. This bizarre cloud, measuring approximately 185 miles in length, was the result of an outflow boundary, a shock wave of fast-moving air radiating from thunderstorm clouds. As the cold air from the clouds descended towards the地面, it rapidly expanded outward, forcing warmer air upward and creating the arc-shaped line of clouds. In drier regions, outflow boundaries can sweep up dust and sand, leading to short-lived walls of particulates known as haboobs.