Severe thunderstorm threat emerges over the Prairies, risk of tornadoes

A very wet and active pattern has swept the Prairies, with back-to-back systems bringing rounds of rain, and heavy alpine snow ahead of the May long weekend. On Thursday, the chance for thunderstorms re-emerges, with the threat for storms to turn severe across parts of Alberta and Saskatchewan.

DON'T MISS: Canada's May long weekend has it all, except for the 'perfect' forecast

Supercells are possible along the Alberta and Saskatchewan border, which could rotate, and possibly produce a tornado Thursday afternoon or evening. Large hail and strong winds will also be a threat for storms that do develop.

severe thunderstorm threat emerges over the prairies, risk of tornadoes

Those in the affected risk areas are urged to stay alert and up-to-date on all weather warnings. Conditions can change quickly when severe weather hits.

Thursday: Severe thunderstorm chances bubble up over Alberta and Saskatchewan

Widespread rain will continue across Alberta on Thursday, greatly aiding in the wildfire situation for places like Fort McMurray. As of Wednesday morning, the fire there had consumed nearly 21,000 hectares of forest, nearly doubling in size in just one day's time.

SEE ALSO: Fear, anxiety as thousands flee their homes in Fort McMurray due wildfire threat

A developing low across the south, will spread showers and thunderstorms through the afternoon and evening hours, some storms which could turn severe in nature later in the day. Supercells are possible along the Alberta and Saskatchewan border, with the potential to rotate, and possibly produce a tornado.

Large hail, heavy rain, and strong winds will also be a threat for storms that develop across both provinces.

severe thunderstorm threat emerges over the prairies, risk of tornadoes

Friday: Lingering thunderstorm threat

By Friday, the low intensifies as it spins into central Saskatchewan. Wrap-around rain and snow showers are expected across northern Alberta, with 30-50 mm of rain expected.

The thunderstorm threat will once again bubble up across Saskatchewan and into Manitoba, where we'll closely watch the late evening storms stateside. There's the potential these storms could bring damaging winds into Winnipeg and areas further east, but there's still some uncertainty with the development and severity.

severe thunderstorm threat emerges over the prairies, risk of tornadoes

WATCH: Fort McMurray evacuation order in place until at least Tuesday

Heavy alpine snow ahead of the long weekend

In addition to the rain and storms, Thursday’s system threatens some substantial snow for the alpine regions of B.C., and into the central and southern Rockies of Alberta through Saturday. That's as temperatures sit about 5-10°C below normal.

We will closely watch to see if any snow will reach into the foothills and even localized areas east of the Rockies through the start of the May long weekend.

severe thunderstorm threat emerges over the prairies, risk of tornadoes

Temperatures will be well below seasonal across most of the region for the long weekend, with another significant system and the potential for more snow, early next week.

Stay with The Weather Network for all the latest on your forecast across the Prairies.

WATCH: Forecast holds some good news for wildfire in northern Alberta

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