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Quote:

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"make their own weather".

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I dunno if they actually make their own environment, but I do think they certainly 'bend it' more than just a small amount. >>

I always thought that they needed to be quite intense, to be substantial movers and not just be "leaves in the stream." To me, that seems to be the province of high cat. 4s-5s. But it seems that even they get turned by troughs, if the trough is strong enough.

Maybe a very strong storm could pump enough heat into a high-pressure system, bolster it a bit, and maintain a more westerly course longer? I don't know.