I work downtown Milwaukee, about two blocks from the Bradley Center. As of 2 p.m. there is just very light snow; streets and sidewalks are just wet. No accumulation. If you are debating about driving in, as of now, there are absolutely no problems or weather issues.
Weather.com radar is showing the storm arriving around 6, as far as I can tell. Then again, the commute to downtown was very, very slow this morning despite little/no snow and very few accidents.
...which isn't to say people shouldn't drive in for the game. Just drive carefully!