Seems they tried cloud seeding once, this is Quora stuff but seemed topical
If you did try it I think the apparatus would have to be huge, and even if you did impact it i don't think you could direct it, at least that's what this guy seems to be saying and I would agreeThey first did it with dry ice in 1947, Project Cirrus!
During the single performed run, pilots flew over a hurricane that was headed out to sea, and dropped a 180-pound payload of crushed dry ice into the storm in an attempt to alter the temperatures of the hurricane clouds, which would in theory slow down the storm’s wind speed. Initially, the pilots said they did notice some change, but it was not actually clear if the changes they observed were caused by the ice.
After the hurricane had been seeded, it took a directional turn, making landfall in Savannah, Georgia, and doing extensive damage. After reading about the seeding experiment in the newspaper, some Savannah residents threatened to sue the government. The legal action came to nothing, but the incident cast a pall on the idea of trying to alter hurricanes.
You're talking about changing the path of a weather system that (fairly typically, there is great variation) covers about 37000 square miles (a bit larger than Indiana) and masses a few billion tons, but offers no solid surfaces to push on.
It's a shot in the dark because, again, we have no idea how to do it, but, I'm guessing that the energy budget per day to pull it off would look something like the annual energy production of the United States. It just isn't going to happen.
This doesn't even think about the unintended consequences of a gigantic intervention in a system as chaotic as weather and climate. Even if in some far future time the basic technological hurdles were overcome, one would hope that rationality would prevail, and nobody would start mucking about with the messy system that keeps life going on Earth.
