Comment by gabinator

In case you're curious -- computer scientists have been trying to simulate/predict weather over half a century and it's led to some really awesome math/compsci discoveries.

If you've ever heard of the Lorenz/Butterfly Effect/Strange Attractors, those chaotic systems were discovered because of a discrepancy between two parallel weather simulations. One preserved the original simulation's calculation train while the other started off with simply the previous results (out to like 10 decimals) and suffered from a rounding error and thus both simulations diverged hugely.

Lorenz was trying to simulate weather by subdividing the atmosphere into tons and tons of cubes. Really interesting reading/video watching tbh.