The cold is here to stay for awhile, but at least the wind is nice and light today which will make those -20ish temperatures more bearable. In fact, with bright sunshine and afternoon highs near -21C, it won't feel too bad at all out there today. For tonight, a weak system from Alberta will cross southern MB bringing some light snow to the area, with a dusting to 2 cm possible in most localities including Winnipeg. Behind the system, northerly winds of 20 km/h will develop for Thursday, with temperatures in the mid minus 20s producing windchills in the minus 35 to minus 38 range (still shy of -40 warning level) Winds should drop off again Friday so windchills warnings may not be necessary for the rest of the week over much of southern MB. On Saturday, a storm system over the central Plains will bring an area of snow over the Dakotas into southern MB. Like last weekend's storm, the bulk of the snowfall with this next storm system is expected to remain south of the border, however it's possible parts of southern MB could see 5-10 cm on Saturday. Unfortunately, gusty northerly winds are forecast behind this system for Sunday with temperatures in the mid minus 20s and windchills likely in the -40 to -45 warning range again. Below normal temperatures are expected to continue through the first part of next week, with models hinting at some moderation by Christmas.
Note that Winnipeg has had a daily maximum temperature below -20C since Sunday Dec 14th. With forecast highs below -20C for the next 5 days, it's possible we may go 10 straight days before we crack the -20C mark again. This would be the longest such streak for a December in recent memory. (longest -20C streak for a December in Winnipeg was 15 straight days from Dec 11-25 1879, during Winnipeg's coldest December on record)