We are not crossing any "gravitational plain" [sic] in 2012. I think I saw the same video that you did. It's total bull. The earth crosses the galactic equator twice every 225 to 250 million years. Our next crossing is several million years away and there is NO legitimate reason to expect anything unusual to happen then. This business of some kind of disk that is gravitationally stronger than where we are now is utter nonsense. You will not find a legitimate astronomer anywhere who makes that claim.
Where do these people come from who make these videos, and can't they spend their efforts any more productively than lying and making up absolute garbage just in order to attract attention to themselves and scare a lot of kids?
Weather has nothing to do with it.
Note, the "gravitational plane" you are referring to is claimed by these idiots to be due to the rapid spinning of a trillion solar mass black hole at the center of the galaxy which causes a dense gravitational disk. Wrong. The gravity found throughout the galaxy is simply a function of how the matter is distributed. There are more stars and gas and dust near the plane of the galaxy, that's all, and there is NOTHING peculiar about traveling through it. The mass is concentrated in a roughly planar region because of the rotation of the galaxy, just like the planets are all roughly on the same plane around the sun, and there is no black hole and dense gravitational disk there, is there?