A strong cold front will push across southern MB late Saturday driving in the coldest airmass of the season so far Saturday night into Sunday across the area. The cold air will be ushered in by strong northwest winds gusting to 70 km/h, with locally higher gusts off the lakes. Temperatures on Sunday will struggle to reach +3 or 4 degrees, and those gusty northwest winds will make it feel 5 to 10 degrees colder. Most areas in southern MB will likely wake up to see some snowflurries Sunday morning, but localities southeast of Lakes Manitoba and Winnipeg may see heavier bands of lake effect snow Saturday night into Sunday as those cold northwest winds sweep over the open lake waters. Lake water - 850mb temperature differentials will be approaching 20C by Sunday morning, which is favourable for narrow bands of heavy lake effect snow. Note also that lake levels are running a little higher than normal right now, so northwest gales of 35 to 45 knots over the lakes may produce some shoreline erosion on the eastern shores of Lake Winnipeg and Lake Manitoba. Fortunately it appears this arctic blast will be short lived as lighter winds and moderating temperature are forecast for Monday and Tuesday.