I would be skeptical. Those Thunder runs get absolutely no sun in January. But I would also be curious. This is as warm as it gets for January, so if the snow in Emile's etc. is still hard, that would confirm it's going to stay that way no matter what until either new snow or mid-February.
From Garry's comments, Chair 4 is probably marginal already. There is a possibility that Nightmare and Bentley's soften in the afternoon. But it's rocky under chair 1 so you might have to hike a bit at the bottom.
I'm hoping Garry gets up there soon so I can get more up-to-date info.