Saturday, June 29th 2019, 1:45 pm - Temperatures will exceed 30 degrees for some
Conditions are once again favourable for severe thunderstorm development across the Prairies and the main risks include powerful wind gusts, torrential rains, large hail, and the chance of tornadoes. This parade of summer storms is courtesy of a slow-moving trough that is anchored over B.C. and is drawing heat and humidity from stateside into the region. More on the highest risk spots, and how the rest of the Canada Day long weekend shapes up, below.
- Thunderstorm risks continue through Alberta, Saskatchewan, and Manitoba
- Heavy rain, hail and tornadoes are possible
- Severe weather largely pushes into Manitoba through Saturday afternoon, evening
- Get updates on watches and warnings on our ALERTS page.
PERSISTENT STORMS TRACK EAST
Environment Canada confirmed that severe thunderstorms near Jimmy Lake and Lac La Biche, Alberta, had turned tornadic on Friday night and multiple tornado warnings were issued.
The severe thunderstorm risk continues Saturday afternoon and evening across a wide area that stretches through Saskatchewan and Manitoba, with a strong risk that further storms may turn tornadic.
The main threats associated with these storms are similar to the impacts that Alberta and Saskatchewan have recently experienced and include torrential downpours, hail, wind gusts near 120 km/h, and the chance of tornadoes.
Throughout the afternoon hours, the atmosphere will begin to cook and destabilize as the sun heats up the surface, which will humidex values near 40.
Simultaneously, the strong winds aloft will be overriding the region with extreme storm energy, which will provide support for deep convection and severe storm development.
WATCH BELOW: TRACKING THE THUNDERSTORM ENERGY
A line of storms is expected to fire up through southwestern and south-central Manitoba in the late afternoon and then progress eastward through the evening and overnight hours.
These strong supercell-type thunderstorms have the potential to bring large hail, heavy rainfall, powerful wind gusts, and the chance of tornadoes.
EXTREME HEAT FUELS SATURDAY'S STORMS IN MANITOBA
Building heat and humidity goes hand in hand with the severe thunderstorm risk, as humidex values jump to the low 40s across parts of southern Manitoba Saturday afternoon.
These scorching conditions are a result of a persistent trough that has slowly tracked across B.C. into the Prairies and is drawing up significant humidity from the U.S. that is not only fueling torrential rains but is adding to the sticky conditions that will linger into Sunday.
Majority of the region will see the temperature and humidex values peak on Saturday and then slightly decline by Sunday, although many will still see temperatures in the mid to high 20s or even the low 30s.
Stay with us here at The Weather Network for your latest forecast updates.