On Wed, 03 May 2006 17:56:46 -0400,
BOB , in
wrote:

+ If this pattern does exist, could some please discuss it here or
+ provide me with a link that talks about it?

This will give you a taste for the El Nino/La Nina influence:

http://www.coaps.fsu.edu/papers/impa...adic_activity/
http://www.coaps.fsu.edu/papers/impa.../tornpix.shtml
http://www.spc.noaa.gov/publications...fer/pacsst.htm
http://home.comcast.net/~bscheftic/ensotornado.html

+ Also, I have noticed that the average is 1200 per year but some years
+ have far more and some far far fewer than that number. There must be
+ something in our climate that is causing this. I really wish I knew
+ what that was so I could get a gauge on what to expect.

That's called inter-annual variability. But it isn't so
simple. There's also multi-decadal variability, and likely to be even
longer scale oscillations that (supress|increase) activity, depending
on which side of the oscillation you're on.

--
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