The Weather Network – High probability of storm leading up to heavy rainfall, flooding potential for prairies

Sunday, June 12, 2022, 8:01 am – There is a risk of severe thunderstorms across the Southern Prairies on Sunday. Another storm is due Monday with significant rainfall possible for western parts, possibly exceeding 100mm for some areas.

Sunday will be another day with widespread risk of thunderstorms spanning the Prairies.

Enough energy will be present to allow some thunderstorms to penetrate southern parts of Alberta just east of Calgary, Saskatchewan and Manitoba, including the Highway 1 corridor between Calgary and Winnipeg.

Environment Canada and Climate Change (ECCC) briefly issued a tornado warning this afternoon for Big Arm’s RM, which includes Imperial and Liberty, Saskatchewan. The tornado warning has now ended.

PRRISKSUN

The strongest storms in this region can cause large hail and gale force winds. Some rotation cannot be ruled out.

Aside from Sunday’s storm threat, we need to look ahead to the next major storm system arriving early this week.


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MONDAY TO WEDNESDAY: BIG SYSTEM APPROACHES WEST, TEMPERATURES MAKE A DIVE

Special weather reports are in effect for the Alberta foothills, including the city of Calgary, ahead of the significant storm that attacks the Prairies this week.

“Prolonged rainfall will affect the eastern slopes of the Rockies on Monday and Tuesday,” Environment and Climate Change Canada (ECCC) said in its statement.

A low pressure area will cross the border Monday and meander across the central Prairies for several days. This low level will lead to large amounts of rain in some areas, with most of the rainfall likely to be directed towards the southern Alberta foothills.

PRRAIN

Continued upwinds will lead to drenching rains in some areas starting Monday and continuing through Wednesday. We can expect significant rainfall totals as a result of this prolonged downpour. Stay alert for the potential for flooding in some areas.

A wide area from Nordegg to Waterton is expected to see at least 50mm on Wednesday morning, with 100mm or more possible in some regions of the foothills. Currently, it appears that most of the rainfall will fall near Kananaskis, west of Calgary, although the major city could get 100mm of rain.

This region can certainly use the rain as we get caught up in exceptional drought conditions in the western Prairies, but too much rain at once isn’t quite the answer.

PRDrought


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