Ho do tornadoes form in cold weather?

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Offline Eric A. Taylor

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Ho do tornadoes form in cold weather?
« on: 15/12/2010 01:53:26 »
Today (14 Dec) a tornado struck in a small town about 40 miles south of where I live (Near Portland, Oregon) It's been fairly cold all week. I thought tornado needed warmer weather to form.

Tornadoes require quite a lot of energy to get going and are extremely rare in Oregon. To be honest I think more about the threat from "the big one" that everybody is talking about. I've always thought that to get a tornado you need to have a super cell, and to get that you need heat. So how do you get a twister when it's cold?
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Offline SeanB

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Ho do tornadoes form in cold weather?
« Reply #1 on: 15/12/2010 18:44:34 »
You do not need heat, you need a temperature difference that enables the formation of clouds, and if the topography is right you will have the possibility of a tornado forming.