The system that prompted tornado warnings in Saskatchewan and brought large hail and localized flooding to parts of the western Prairies will continue to push eastwards on Wednesday, with the severe threat now focusing over Manitoba. Although storms won't be quite as strong as Tuesday's, large hail, heavy rain and gusty winds are still a risk. Temperature-wise, daytime highs will be quite chilly this week thanks to cold and fall-like air filtering in behind the system. More on the storm timing for Wednesday, plus a look at the dropping temperatures and what lies ahead for the rest of the week, below.
WEDNESDAY: THREAT FOR SEVERE STORMS MOVES EAST, TEMPERATURES COOL SIGNIFICANTLY
Tornado warnings were issued in Saskatchewan Tuesday afternoon and evening, but there have been no confirmations of any potential touch downs. The storms did bring reports of localized flooding, hail, torrential rains and strong winds across many areas of the province and Alberta, as well.
There was also at least one visual of tree damage posted on social media.
The trough that helped develop a low-pressure system responsible for Tuesday's severe weather will continue to move east Wednesday. Similar to Tuesday, the unstable air mass and a surface boundary will be present, acting as possible triggers for thunderstorms in the afternoon and evening
The risk for thunderstorms will stretch from northeastern Alberta into southwestern Manitoba, with the focus of the severe chance confined to southeastern Saskatchewan and southwestern Manitoba. The main hazards with the severe storms will be heavy rainfall, strong wind gusts and large hail.
A large system over northern-central Saskatchewan will slowly track east Wednesday, bringing more heavy rain to central and northern areas of Alberta, as well.
The heaviest rain will occur in central and northern Alberta, where 60-80 mm is possible in the hardest-hit regions. Surrounding regions could see 40-60 mm by the time it tapers off Thursday morning. A swath of 20-40 mm is anticipated in northern and central Saskatchewan.
In the rainfall-warned areas, localized flooding in low-lying areas is possible. Watch for possible washouts near rivers, creeks and culverts.
Temperatures, meanwhile, will continue to stay on the cool side on the western Prairies behind this system. Daytime highs will range from the low teens to the low 20s to welcome the beginning of meteorological autumn on Wednesday, while Manitoba will be somewhat warmer as temperatures reach the mid-20s.
LOOK AHEAD: COOL TEMPERATURES TO START SEPTEMBER
Cool weather will dominate this week, but temperatures will be warmer in eastern sections. Beyond Wednesday, conditions will be mostly dry across southern areas of the Prairies.
A Colorado low should stay south of the border, but some rain will clip southeastern Manitoba on Friday. A warming trend back to near seasonal temperatures is expected for the weekend for Alberta and Saskatchewan.
Temperatures will be within a few degrees of seasonal next week.
Be sure to check back for the latest updates on the slow moving system across the Prairies this week.