@Brad_Rosenheim Indeed.
..
musing: I wonder how many weather pattern changes are subject to climatological hysteresis, i.e., those actuarial tables, climatological norms etc are amenable to updates after some arbitrary number of decades, capturing new norms; and how many are progressive, chaotic or linear, and therefore not really updatable (on human timescales, anyway) because the next few decades will continue to be different to the last few decades for a very long time to come.
(Clumsily expressed, sorry.)
I guess we just have to run the experiment and find out -- and, as luck would have it,..