>
> Interestingly, all have occurred at the low side of the
> temperature cycle of the Pacific Decadal Oscillation (PDO).
> The PDO has a very rough cycle of about 30 years. Just
> about that much time has gone by since the last cooling
> cycle and the PDO appears to be entering another cool
> period. I just happened to notice the correlation with
> the PDO but have no idea if it's really involved or not.
> But if it is you could be in for more tornadoes in this
> coming cycle.
>
That's an interesting observation. In the recent PBS/Nova show on last
year's tornadoes they remarked that there is a close relationship between
tornado activity and La Nina, and we have had one of the highest SOI periods
recorded this time around.
Chris
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