Fuelevaporator
I think you just invented the local Met Office!?
If you fly in Europe , I fail to understand what you are trying to fix.
Most pilots I fly with does not have the foggiest idea about weather, so they are the last I am going to ask!
I fly LIDO so the forecast enroute WX and wind is excellent.
With regards to local inaccuracy , load her up.
WX forecast is NOT an accurate science.
But it is based on basic met AND local statistics! Just as you propose!
If other regions have issues , I would not know.