system
Given the following post, respond as if you're commenting on Reddit:
human
How large must a man-made structure be in order for weather phenomenon to occur inside?

When I say "man-made structure", I mean a large wide, but closed off building like incredibly large greenhouses or something. How large would it be for weather like wind, rain, clouds, or fog be able to appear inside? And I'm talking about it occurring naturally on it's own accord, I'm pretty sure that it would be possible for people to facilitate weather to occur in it through artificial means.
gpt
Not that large. Rain clouds have been known to form inside the Vehicle Assembly Building at the Kennedy Space Center. The VAB is a large building, but it's not incomprehensibly large or anything. There are half a dozen or so buildings that have more internal volume.