Very pleasant fall conditions will be continuing for the next few days as temperatures rise to near 20°C. A high near 21 to 22°C is expected in Winnipeg today under just some high cloud at times. Winds will be fairly light.
Tomorrow looks very similar to today except a degree or two cooler with a high of 19 to 20°C under a mix of sun and cloud.
Then things get interesting as a Colorado Low rides the jet stream which just so happens to be moving from south to north. This will bring the low right into southern Manitoba on Friday. However, showers are possible ahead of the system on Thursday. The bulk of the rain moves into western parts of southern Manitoba Thursday night. Showers will again be possible in Winnipeg on Friday. Due to how far north and west this system is expected to track, some thunderstorms will even be possible across southern Manitoba Thursday night and Friday as we tap in some instability and higher moisture from the south. Yes, I'm not kidding.
The bulk of the rains with the system are expected to be west of Winnipeg with amounts of 25 + mm possible along the Saskatchewan border. Lower amounts in the RRV are expected. Seasonal to below normal temperatures will return behind the low.