Cloud cover will thicken up throughout the day today. A bit of sun will still poke out of the thin cloud this morning, though it should be cloudier this afternoon. It will be a rainy day in southwestern Manitoba with showers all day. Amounts there could reach 15 mm locally, especially the closer to the Saskatchewan border you are. That rain will try to push into southeastern Manitoba this evening, though it is still a little uncertain just how far east this rain will reach. High pressure in northeastern Manitoba may just be strong enough to keep most of the rain to our northwest, and to our south in North Dakota.
My forecast is just for a chance of showers this evening and overnight, with little to no accumulation in the RRV and southeastern Manitoba. Expect highs around 13 or 14°C in the city today. With a bit of sunshine, we may reach 16 or 17°C Saturday.
Tomorrow night becomes another tricky forecast. Essentially, the rain could 'split' once again, with the heaviest rain falling in Saskatchewan and way to our south in southern Minnesota. I expect we will still see some showers here in the city, but they will not be very significant with just a few mm possible. As the centre of low pressure moves into the Interlake throughout the day Sunday, showers and even a couple thunderstorms will possible Sunday. Wrap-around rain moves in Monday.
Briefly, here's my current rain forecast for the city of Winnipeg:
Friday evening and overnight ~ 60% chance of showers, little to no accumulation.
Saturday evening through to Sunday morning ~ A few showers, a few mm possible. Uncertainty exists.
Sunday afternoon and evening ~ 60% chance of showers, perhaps a rumble of thunder.
Monday ~ A few showers, a few mm possible.