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UNSW : UNSW Atmosphere Study Guide
Atmosphere Study Guide 8 The storm chasers If you experienced 20 extreme weather events in a year, you’d think yourself unlucky. But storm chaser and weather photographer Jim Reed considers it a career. He’s spent nearly 20 years documenting the most extreme meteorological events across North America, and here are some of his remarkable images. STORY Gemma Black IMAGES Jim Reed/Barcroft Media Close encounters In western Kansas on 8 May 2008, professional storm chasers monitor an approaching ‘landspout’ tornado. These form in the updraft of rapidly growing cumulonimbus clouds, located directly over a shift in wind directions. They can be more difficult to predict than other tornadoes as they form very quickly after an updraft has started. Hitting the wall A ‘wall cloud’ forms beneath a tornadic thunderstorm in Wilson County, Kansas. Wall clouds develop after an intense supercell or multicell storm has begun to precipitate, pulling humid rain- cooled air upwards until it saturates and forms the lower, hanging cloud. Explosive storm front A supercell thunderstorm explodes near WaKeeney, Kansas. Although the rarest kind of storm, supercells are also considered the most dangerous because of the extreme weather they can generate, including giant hail, flash flooding, lightning and tornadoes. Engage