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Last week's forecast got off to a rough start. The area of low pressure that pushed through the eastern Prairies ended up as a large upper level low. Because those are slow to move out, they can affect systems trying to move east by backing them up or forcing them to take a different path. So, while the overall pressure pattern across the Prairies was still slack as forecasted, the details got all messed up.

Southern Alberta, southern and central Saskatchewan and Manitoba will see another day or two of hot weather before the northern low drags a cold front southward, which will bring an end to this extended heatwave.