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To: E. Charters who wrote (14827)	6/30/2006 6:47:10 AM
From: Gib Bogle	Read Replies (2) \| Respond to of 78419

Well, if weather is chaotic, as seems to be the case (and as was certainly the case with Lorenz's extremely simple model) then it is deterministic but not predictable. The point (this is how Lorenz discovered the chaotic nature of his weather model) is that even infinitessimal changes in the initial conditions will after some time lead to completely different states. All computer models of weather and climate start from an estimate of the initial state (i.e. now). This initial state can only ever be known approximately. en.wikipedia.org