Oh, I forgot ! Pilots walk on water, therefore they are not human and can predict the future right down to the minute!!!
I guess the Metman's forecast is always right, pilots complain about inaccuracies purly as a matter of it is a nice chance from complaining about the airline food
I have to deduct then that the Japanese are human too, the fact that they could not predict the earthquake beforehand
Getting an inflight updated forecast will make the data more accurate, because accuracy deteriorate the further you predict into the future.
Getting an actual from the tower or the ground staff during the descent will be even more accurate, leaving you with only temperature, instrument and calibration error on the altimiter only
No heavenly powers needed, because 100' is added as a safety margin for determining your minima. Sorry to make your godly appearance evaporate in the mist