A system moving through Manitoba tonight will bring possibly our biggest snowfall of the season so far in Winnipeg. A few flurries may fall this morning, but the main snows will begin later in the afternoon, be most intense overnight tonight, and end sometime in the morning or midday tomorrow. 4-8 cm is expected. Breezy conditions tomorrow will create blowing and drifting snow in open areas. After reaching our high in the morning, temperatures will plummet to the mid minus teens in the afternoon.
Unfortunately, it appears our coldest air of the season so far is headed for Sunday-Monday. After dipping well into the mid -20's Sunday morning, we may not even exceed -20°C for a high in the afternoon. Monday morning may be our coldest so far this year with lows in the -30's likely... And I do think the chance for -30°C is better than a few days ago. I wouldn't be surprised to see some lows around -31 to -33°C in the RRV and southeastern Manitoba.
There is a glimmer of hope by the second week of December right now. Models are in good agreement right now that the cold will be letting up, giving way to more normal or even slightly above normal conditions for at least a few days. The NAEFS has switched to more above normal right now as well. However, this is still pretty far away and so, we'll just have to wait and see if this comes true. It is possible this may just be a few days warmup and nothing that would last long.