It's another frigid morning over southern Manitoba with temperatures dipping to -35C or colder in many areas of the Red River valley and SE Manitoba. Winnipeg airport dropped to -35C earlier this morning, the coldest reading of the winter so far. Arctic high pressure over southern Manitoba will maintain sunny and very cold temperatures today but luckily winds will be light so windchill won't add noticeably to the cold. The good news is that a moderating trend will begin tomorrow as a warm frontal boundary over Saskatchewan starts pushing eastward. A series of Alberta clippers over the next few days will gradually push this boundary across Manitoba, allowing milder Pacific air over the western Prairies to start spilling into southern Manitoba.
The transition to this milder weather will begin overnight through Sunday as a clipper system starts pushing cloud and some snow into southern Manitoba along with increasing south winds. Temperatures will be on the rise overnight through Sunday, with temperatures of zero to -5C expected west of the Red River valley by late Sunday including Portage and Brandon. The milder air will be slower to arrive in Winnipeg and the Red River valley with temperatures rising to -7 to -10C by Sunday evening, but accompanied by brisk southerly winds gusting to 50 km/h which will add a noticeable wind chill along with some local blowing and drifting snow. Milder temperatures will push into the Red River valley early next week, with highs up to -3c possible Tuesday into Thursday. Colder weather looks to return by next weekend.