Colder weather is finally moving over southern Manitoba, ushered in by brisk northerly winds advecting colder Arctic air into the province for the first time in weeks. These winds are blowing over the still open waters of the Manitoba lakes, where ice formation has been delayed this year due to the prolonged mild weather in November. The result will be localized bands of lake effect snow off Lake Manitoba and Lake Winnipeg (particularly off the north basin). Northerly winds tonight and Thursday will set up snow bands immediately to the south of the lakes affecting areas through the central Interlake, as well as the Portage La Prairie and Beausejour areas. By Friday, the winds should veer slightly to the north-northwest which would push the snowbands a little further to the east. 10-20 cm of snow is possible under persistent snow bands while little snow is likely outside these areas. The cold weather is expected to persist for the next week or two, which will quickly freeze up the lakes over the next couple of weeks shutting down the lake effect machine.
UPDATE: see local radar image above from Thursday morning showing lake effect bands