Northern parts of west-central Saskatchewan could face dangerous thunderstorms Saturday afternoon and evening, with tornadoes, large hail, damaging winds and heavy rain all possible.
The greatest risk is expected from the North Battleford region northeast toward Prince Albert and Meadow Lake, where conditions could support rotating supercell thunderstorms.
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Macklin, Unity, Wilkie and Biggar are also within the broader severe weather zone, while communities farther south could see organized lines or clusters of storms capable of producing damaging winds, hail and torrential rainfall.
Forecasters say warm, humid air combined with strong winds at different levels of the atmosphere will create an environment favourable for powerful and potentially rotating storms.
Available atmospheric energy could reach moderate levels across west-central Saskatchewan, while strong wind shear could help thunderstorms become organized and long-lived.
The most favourable area for tornadic supercells is expected to extend from North Battleford toward Saskatoon.
Any isolated storm that develops in that environment could intensify quickly and become dangerous.
A layer of warm air above the surface may initially prevent storms from developing, meaning the most significant activity could hold off until later Saturday afternoon or evening.
Once that cap weakens, thunderstorms could develop rapidly.
Earlier storm activity could reduce the amount of energy available later in the day, creating some uncertainty about how widespread the severe weather will become.
Environment Canada’s early Saturday forecast called for a risk of thunderstorms in North Battleford, though no weather alerts apart from numerous heat warnings were in effect as of 10 a.m.
Humidex values reaching 38 will continue, Environment Canada said, with southwest Saskatchewan getting daytime highs in the low 30s and overnight lows in the high teens Saturday and Sunday. Humidex values yesterday were near 40, which will also continue today. A cold front sweeping through the province on Sunday will return temperatures and humidity to near seasonal.
Farther south, storms may be more likely to merge into larger clusters or lines.
Those storms could still produce severe wind gusts, hail and heavy rain, with severe weather potentially continuing into Saturday night.
The forecast for Saskatoon called for thunderstorms and additional showers Saturday, with winds gusting to 50 kilometres per hour by midday.
Residents are encouraged to monitor Environment Canada alerts throughout the day and have a plan to move indoors if warnings are issued.
During a tornado warning, people should move to a basement or a small interior room on the lowest floor, away from windows.
— with files from CJME News
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