|NAM model showing surface temperatures (F)|
Wed morning. Arctic high building in from Saskatchewan
will bring in mid winter cold over southern MB
For tonight, a weak clipper system that has been bringing some light snow across southern MB today will exit the province, with gradually clearing skies tonight from the north. This will allow temperatures to drop well into the minus 20s by Wednesday morning, with some spots in the northern Interlake likely hitting the -30C mark (Moosehorn, Grand Rapids, Berens River, Swan River, etc) In Winnipeg, temperatures are forecast to drop to -26C overnight with light northwest winds creating wind chills near -35 for the morning commute. Temperatures will recover only to around -18C Wednesday under sunny skies, some 13C below normal for late November. Wednesday night into early Thursday will be downright frigid in Winnipeg and the RRV as the core of Arctic ridge crosses the region. That will allow temperatures to plummet towards the -30C mark even in Winnipeg Wednesday night into early Thursday morning.. so make sure you have those block heater cords ready and working! (For the record, the earliest that Winnipeg has hit -30C or lower was on November 19th in 1896 with a reading of -33.9C. Record low for Thursday (Nov 27th) in Winnipeg is -36.1C in 1891, and more recently in Nov 1985, the airport had 5 days of -30C or lower over the last week of November. So believe it or not, it has been worse at this time of year)
A slight moderation is expected by Friday as the next clipper system moves in with some light snow, and high temperatures near minus 10C. Unfortunately, it looks like we're back into the deep freeze over the weekend into early next week behind the clipper system. There are some signs that the abnormally cold pattern will relax a bit by the middle to end of next week, but we'll have to see if those moderating signs continue over the next few days. Until then, bundle up and get prepared for some mid winter cold.. in November!