From: Edward Green on
On Dec 29 2009, 4:32 am, alien8er <alien8...(a)gmail.com> wrote:

<...>
>   The existence of attractors in chaos theory are what makes it useful
> for making predictions. A complex system like the Earth's atmosphere
> can exist in many states, but not infinitely many. Which states it can
> transition to from a given state are _limited_ by chaos theory. Trying
> to predict the future behavior of the entire atmosphere is futile.
> Small pieces of it are somewhat easier.
>
>   Forty years ago in Southern California the temperature couldn't be
> predicted for three days out to within five degrees, and the
> probability of precipitation was a complete crapshoot.
>
>   Currently the reliable range is about a week.
>
>   Is it perfect? No. Is it useful? Yes.

Thanks. I didn't know that. There is some useful signal around here
above the noise after all.