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View Diary: A note on tornado intensity ratings (53 comments)

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  •  If warm and wet air (0+ / 0-)

    are all you need to make a tornado, the tropics must be having EF-5 tornadoes daily. Nope.

    You also need cold air and wind shear to make a tornado.

    http://www.drroyspencer.com/...

    •  Re-read my post - never said that was all you need (0+ / 0-)

      You're right, of course -- the warm, wet air from the Gulf meets the colder air moving east across the plains, creating wind shear and rotation.  The point, however, is that the warmer and wetter the air from the Gulf, the more powerful the storms, and the more LIKELY a powerful tornado.  

      •  Shear is more importnat (0+ / 0-)

        The intensity of tornadoes is almost independent of the thermodynamic energy available to the storm. It is strongly controlled by the vertical wind shear of the environment in which the storm forms.

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