I would challenge the ticket ther etoo. There are often close parking spots that are non-handicap. For example, maybe the first "row" of cars holds four handicap spots and the fifth one was for the general public. Not knowing that because of the snow was not your fault, you made a reasonable assumption That, and if a person who had a disability had to park on snow like that, they could have fallen on their ass. Definitely challenge the ticket and bring up the fact they weren't keeping it safe to begin with. Good luck!