Well above-seasonal temperatures will wash over Southern Manitoba today as a powerful low pressure system in the Arctic drags a swath of very warm air eastwards across the Prairies. It won’t be meant to last, though, as a strong ridge of high pressure builds in behind a cold front that pushes through on Saturday, bringing cool Arctic air with it for the weekend.
25°C / 15°C
22°C / 4°C
Cloudy with a good chance of showers or thundershowers, then clearing through the afternoon.
19°C / 6°C
Mainly sunny and cool.
We’ll see a breezy wind out of the southwest today as temperatures climb into the mid–20’s thanks to a warm front that pushed through overnight. We might see a little bit of cloud, but for the most part skies should be mainly sunny. Still in the warm sector of this system, we’ll only drop to the mid-teens tonight with some increasing cloudiness towards Saturday morning as the cold front approaches.
Saturday morning will bring a fairly decent chance for some scattered shower activity as the cold front pushes into the Red River Valley from the north. There may be a few thundershowers as well but no significant or widespread thunderstorm activity is expected. Gusty northerly winds will move in behind the cold front – which should be through much of the Red River Valley by midday – with clouds scattering out to a mix or partly cloudy skies. The temperature should be able to climb a degree or two above the 20°C mark, however cold air advection will limit our high very close to that mark.
Skies will clear overnight as we drop down to a very chilly 4°C or so. Areas outside the city of Winnipeg may even see temperatures dip a little cooler than that. We may end up seeing the first frost of the year in some places on Saturday night but I don’t expect a widespread frost to occur.
Sunday will be a sunny but very cool day as the ridge of high pressure dominates the weather pattern over Southern Manitoba. We’ll see temperatures climb to only around 17 or 18°C by late afternoon but at least the winds should be relatively light, picking up out of the south later in the day to only around 15–20km/h. We’ll see an overnight low of around 7°C on Sunday night with clear skies.