Heat Wave Persists Over Manitoba, small chances at showers and thunderstorms

It looks like southern Manitoba is locked in the middle of a heatwave and this is just the start of the stretch of hot weather, an omega block of high pressure has set up over the prairie provinces resulting in temperatures at times 15-20 degrees above normal, heat warnings are in place currently for much of Manitoba at the moment. There also is some instability forecast in southern Manitoba this weekend. Find out where the hottest of the weather is forecast. 

Above: Photo of the current omega block and jet stream making its way all the way up into northern Canada while sinking south over eastern Canada and western Canada. The heat is a result of this pattern we are currently stuck in.

Friday: Temperatures in the mid 30s across a large portion of southern manitoba. 

Humidity may be a little bit higher with values reaching the upper 30s But I don't see significant humidex values as a factor. by evening temperatures in southwestern Manitoba will be in the upper 20s. there is a small risk for pop up showers and thunderstorms in southwestern Manitoba during the afternoon and evening hours A small chance you might see a rumble of Thunder. This was the thunderstorm chances that was hinted at in the blog post title.

Friday night: Temperatures in the overnight time frame will actually not drop that much, our overnight low temperatures will be close to our normal daytime high temperatures for this time of year with majority of the regions seeing overnight lows in the upper teens and low 20s it'll be warmer the further east you go. The warmest of the overnight low temperatures look to be in eastern Manitoba where some areas may only drop to 22°C.

Above: A snapshot of some of the hottest temperatures forecast over southern Manitoba on the day Saturday with the NAM model, stay cool!!

Saturday: Saturday afternoon majority of the region will be seeing temperatures in the low to mid 30s areas of western Manitoba in the parklands may see temperatures in the upper 20s or low 30s. Humidex values during the afternoon will not be that significant with some regions may be seeing upper 30s compared to our normal average summer humidex in the 40s. Areas of Lake Manitoba and Lake Winnipeg may see temperatures in the mid 30s.

Saturday Night: Cooler Overnight lows are forecast for Saturday night with majority of the region seeing temperatures in the upper teens If you're over by the Manitoba lakes more than likely temperatures will drop with the cooler influence of the frozen lakes into the mid teens.

Sunday: Will be the last few days of the major heat with high temperature values in the upper 20's in western Manitoba, and low 30's in eastern Manitoba. The bulk of the heat on the day Sunday will be in the central and northern regions of Manitoba. The lakes areas again will feel cooler with the result of the ice cover in some locations. 

Sunday Night: There will be a chance for showers in southwestern Manitoba, during the overnight timeframe. There may be a rumble of thunder but the main unsettled weather will be in Montana and NW ND. Temperatures will be in the mid to upper teens there is a chance that ice covered areas will be cooler. 

First half of the week: There will be an increasing risk for showers and thunderstorms on Monday through Wednesday, some of which may be severe as a favourable environment develops for severe weather as a result of strong upper level support, moisture and a unstable environment with low pressure systems moving through. We will be watching this in future model runs and we will keep you in the loop, right now we cannot tell anyone where these storms will happen including Winnipeg, Brandon or any localities as it is too early to narrow down exact locales. Temperatures will be in the upper twenties to start the week.