Today looks to be very nice in the RRV with plenty of sunshine and light winds. We may see some cloud move in this afternoon, but it shouldn't be enough to ruin the day. I'm anticipating a high around 26 or 27°C in Winnipeg.
A cold front moving into southwestern Manitoba late in the afternoon and evening will be the focus of severe thunderstorm activity tomorrow. Although there does appear that there will be at least some sunshine, capping is still a serious issue for storm development. Nonetheless, please be sky aware tomorrow if you are in southwestern and south-central Manitoba because anything that does develop will have a good chance of becoming severe in a hurry. All modes of severe weather would be possible.
However, if capping is too strong, storms may not form until late in the evening. These could still be severe, but the risk for tornadic development would be lower. Winnipeg's chance for storms with this will come overnight through to early Friday.
After early day showers and storms, we should begin to clear out in the afternoon on Friday. It will be cooler, likely only reaching low 20's at most.