In reply to sheffieldchris:
Should be good. I was on Toubkal in Feb 2012 - nothing technical, just walking to the summit, but there was neve all the way down to the refuge (kind of like observatory gully in the spring) and temperature about -11°C overnight at the refuge. Its actually much nicer on toubkal in winter than in summer as the scree (and the frankly insanitary mess all around the hut) is covered in snow.