A winter storm watch has been issued by Environment Canada highlighting the arrival of a major Colorado Low to southern Manitoba tomorrow. At this point it appears 10 to 20 cm is a good bet for areas in this watch, but that's not really the big important problem with the system. Winds of 40 to 50 km/h and gusting to nearly 70 km/h will create extensive blowing snow and blizzard conditions across southern Manitoba. Travel is highly unrecommend tomorrow and Saturday.
I will update this forecast this evening.
Meanwhile, number one of the top 10 weather events of 2012 will be posted Sunday or Monday as I will take some time to provide updates on the storm system.