Prairies: Thunderstorm risk threatens heavy rain, small hail
Cooler air is on the way to most of the Prairies.
A slow-moving trough could act as a trigger for thunderstorms across western regions of the Prairies on Wednesday, the majority of which are expected to be non-severe in nature. Cooler air from the north will be pulled south into the Prairies, which will bring down temperatures across parts of Alberta. See below for more details on Wednesday's storm risk and a look at the rest of the week.
Balmy or brisk? We look at Canada's winners and losers for the final weeks of summer. See where your region lands, here.
WEATHER HIGHLIGHTS:
Thunderstorm risk for Alberta through Wednesday
Cooler, drier air moves in for most, except across extreme south
Stay up to date on ALERTS in your region
WATCH BELOW: TIMING OF RAIN THROUGH THURSDAY
The trough that is moving over western Canada will trigger mainly non-severe thunderstorms across western Alberta on Wednesday, with the central and northern Foothills seeing the first round of storms around the early afternoon hours.

These storms will track southeast across the region through the afternoon hours and into the evening. The main hazards associated with these storms include heavy rainfall, strong winds, and the chance for small hail.
Much of the cold air that is associated with the front that is tracking across the Prairies will stall before it reaches the southern tier of the region.
By mid-to-late week a new ridge of high pressure building into the region will nudge humidex values back into the mid-30s for southern Alberta and Saskatchewan.

