yeah dude we're about done for in Michigan, too. I was up north(4hrs away) this past weekend and we got hammered on Friday with 15"+ but everything south of there it is going to be 50-60F this week. Cooling off a tad next week but that won't help.
We already had one hill close due to lack of turnout (secretly I think it was also because their conditions were absolute shit 2 or 3 weeks ago while the other local hills were better maintained). Right now the others are open but I would not be surprised if they close for the rest of the week and hopefully re-open on Saturday & Sunday. I'll be surprised if any of them last longer than 3/11.
The up north resorts will last until April 1st or so based on their existing base & that last dump but unfortunately I can't get up there any more this season.