An unseasonably cool airmass has pushed into southern Manitoba today with gusty northwest winds advecting Arctic air from the north. Morning temperatures in Winnipeg were a chilly +2C, feeling even colder with northerly winds of 30 to 50 km/h. Sunshine with will mix with clouds today but temperatures will struggle to hit double digits this afternoon. Normal highs for this time of year are 23C. Note that the cold winds coming off the lakes are even generating some lake effect showers mixed with snowflurries this morning off the south end of Lake Winnipeg through the Grand Beach to Beausejour areas as seen in the radar image to the left (snowflurries reported in the Tyndall area this morning!)
For tonight, a ridge of high pressure over southern SK will build into southern MB bringing clearing skies and light winds. This will bring a widespread freeze across southern MB tonight into early Saturday morning with temperatures dropping to the zero to -2C range. Cover or bring in those tender annuals! Saturday will be a little nicer than today with sunshine, light winds and temperatures near 15C.. still a good 8C below normal. Increasing clouds are expected by Sunday with a chance of showers Sunday night through Tuesday.
What you see above is lake-effect showers. With some wet snow flurries mixed in. Lake-effect. In June. *sigh* Summer still looks to be a ways off; after a cold weekend we should return to only slightly-below normal temperatures after some showery weather in the first half of next week with summer still not looking to make an appearance for a while yet.
This is all due to an incredibly stagnant upper-air pattern with a high over low block on the west coast and a massive arctic vortex sitting over top of Hudson Bay. The record low “high” for Winnipeg today is 10.8°C with a record low of 0.0°C. We may break both of those records today.