I've kept my 328i on its Bridgestone Potenza's (255's on the back too) so I'm not expecting it's going to move much this weekend. That said, we've not had all that much snow here in Rossendale, Lancashire. Just a light covering that will be gone in the morning probably.
2006 BMW E60 520d SE 6MT
2009 BMW E90-LCI 330d SE 6MT
Current: 2012 F30 328i Luxury 8AT
2015 Audi A6 Avant Ultra, Black Edition (sorry!)