Scientists are hesitant to blame climate change, but varying weather conditions are causing new and troubling tornado patterns.
It’s been a busy and deadly start to tornado season, and the twisters have hit regions typically spared. We know that a warming climate is creating moisture and instability in the air—two factors that spur the formation of tornadoes. But experts caution that it’s too soon to link one major event—or even season—to. What they are seeing is changes in when and where the tornadoes strike, which could expose more people to danger.
Most tornadoes spring from uncommon supercell thunderstorms. To form, tornadoes need moist, warm air near the ground. But they also need a strong, vertical wind shear, which is caused by wind changing direction and speed between the ground and higher elevations. Air begins to spin horizontally in a cylinder-like shape. As that is lifted and gains speed, it narrows and forms the menacing funnel we recognize as a tornado.
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