Thread: Weather Joplin virtually destroyed by tornado
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Old 05-23-2011, 03:40 PM   #498
DaFace DaFace is offline
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Quote:
Originally Posted by Radar Chief View Post
That makes sense. I assume they calculate that with Doppler?
Technically, the classify them based on the types of damage caused rather than raw wind speed. That's because the wind is only part of the issue. Pressure differentials make a big difference as well.

I'm NOT an expert on this, but my understanding is that it's things like "snapped branches = one level, de-barked trees = another" rather than a strict definition.
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