A weak trough is drifting across central Saskatchewan and providing the uplift and instability needed to bring about another day of severe thunderstorms across the prairies.
A possible mesoscale convective system, which is a long-duration storm, could slide across southern Saskatchewan overnight into Sunday morning and could bring torrential rain and strong winds.
Stronger thunderstorms are also possible in northern Alberta through the pre-dawn hours. Heavy rain and frequent lightning will be the most common feature of the overnight storms as they move through a strong area of high pressure to the south.
READ MORE: Rainwater now unsafe to drink due to ‘forever chemicals’, study says
The risk of severe thunderstorms is centered in eastern Saskatchewan and western Manitoba. Large hail can occur and some hail can exceed 4 cm in diameter.
The risk of thunderstorms will continue to move eastward Monday, allowing for the opportunity for thunderstorms to develop across a broader region of southern Manitoba.
Temperatures on the Prairies are experiencing unusually high temperatures, with thermometers in some areas between 5 and 7°C above seasonality.
Next week: Rising heat will blanket the Prairies
A ridge of high pressure coming from south of the border will push into the southern Prairies regions during the coming week. This will bring a lot of heat to the provinces and is expected to last most of the week.
The southern prairies can expect a long stretch of high temperatures in the 30s. Extended daytime highs in the 30s could begin to approach monthly record territory for Medicine Hat as the region climbs into middle of the month