Now Mann can prove us all wrong…He can call out the future temperatures and, like Babe Ruth, tell the audience exactly where the ball will go. Well let’s see if he can do it.

Mann is a climatologist, not a weather forecaster.

The difference between climate and weather bears emphasizing.

If a meteorological event is consistent with my views about AGW, it is climate.

If not, it is weather.
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Joking aside, without any particular expertise, I assume that the dynamics of a complex system like the atmosphere occurs over a(n incompletely understood) coupled hierarchy of time scales.