The start of this week will be similar to the weekend, with cooler-than-average daytime highs and mainly cloudy conditions. The main weather-maker right now is a low-pressure system situated over southern Alberta and Saskatchewan that is producing heavier rain in central and southern Saskatchewan. The counterclockwise rotation around that low is bringing some moisture around the capital region before tracking south along the foothills. Mixed precipitation and/or snow is possible in the higher elevations west of Calgary, and scattered showers will continue across central and southern Alberta on Monday before that system tracks east. A second low-pressure system will move west to east from B.C. to Alberta on Tuesday, and rain is expected to intensify as that system reaches the southeaster portion of the province. The heaviest accumulations are expected to be in the corridor between the TransCanada Highway and Highway 3. Behind that second low, a ridge of high pressure should introduce a pattern of stability with clear skies and above-seasonal temperatures from Thursday until at least Tuesday. Daytime highs in Calgary will peak on Monday at 23 C but hover in the low-20s for at least five days. Overnight lows will range from 7 C to 8 C, compared to the average low of 4 C.
