World RNG manipulation

[Sopitive]

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Lets suppose I would really like to know when the next thunderstorm will be. As this type of RNG manipulation broke after 1.12, I was wondering if it would be possible to still predict this type of RNG with clientcommands. For example, it would be nice to already be at some sort of charged creeper farm before the thunderstorm starts so that I can use channeling on all the creepers. If this type of RNG is predictable, might it be possible to add a temprule to check the weather and crack the weather RNG based on factors such as the seed, when a storm starts, and the duration of the storm? This idea might be expandable to more than just storms, but also to things such as mob spawning (maybe?). While it might not be possible to manipulate the RNG, predicting it would still allow us to prepare for it a little better.

[Earthcomputer]

The answer is yes, it's possible, but only under very controlled conditions (so not just randomly while you're running around or having other things happening on the server). We actually have a 1.16 world RNG manipulation project on the LiteTech discord that we're working on, with the goal of manipulating fortune drops, using redstone contraptions to crack and simulate the RNG rather than a client-side mod. If you want to take a look or join in, here's the discord link: https://discord.gg/3C7TYkp