So, 2014 is off to a bit of an extreme start weather-wise. We saw -27C weather that felt like -40 thanks to the wind last Thursday, and Winnipeg was colder than Mars.
This evening, it’s about -5C and forecast to go above 0C tomorrow. The incoming warm front has been causing the air pressure to plummet the last few hours (the blue line in the graph below) and we can expect to see freezing rain and probably rain overnight and in the morning. A few hours after that, we can expect to see the cold air return with over the course of a few hours, which should make the evening commute rather messy, with the evening forecast to be -24C and a windchill of -33.
If you look at the aviation forecast, you can see the wind change direction from being out of the northeast (050) at midnight local time (0500Z) to coming from the southwest (230) by 8 am (1300Z):
TAF CYOW 060242Z 0603/0624 07015G25KT 6SM -FZRA -SN FEW006 OVC025
TEMPO 0603/0605 2SM FZRA -PL BR BKN006 OVC030
FM060500 08015G25KT 2SM -FZRA BR OVC005 TEMPO 0605/0611 6SM -FZRA BR OVC010
FM061100 10008KT WS010/17032KT 1SM -RA BR OVC003 PROB40 0611/0612 1SM -FZRA BR
FM061300 23020G35KT 2SM -RA BR OVC008
FM061600 25020G35KT P6SM BKN025
RMK NXT FCST BY 060600Z=
And you can see that the wind from 1300Z on is going to be 20 knots gusting to 35 knots (37 km/h gusting to 65 km/h). Ick.
Dress warmly because weather like that can cause frostbite before you realize it.