Rain continued to fall across southern Alberta overnight and early Tuesday morning. Yellow-level rainfall warnings were issued for portions of southeastern Alberta and southwestern and central Saskatchewan. In their advisory for Alberta, Environment and Climate Change Canada explained, “Rainfall continues this morning. Another 5 to 10 mm is expected, for total amounts of 40 to 70 mm.” By the end of the morning commute, there was sunshine in Calgary and roads were mostly dry. The daytime high on Tuesday is expected to reach 21 C and climb to 24 C by Wednesday. This warmth will be short-lived, with another weather pattern change on the way. The main weather-maker for the western prairies will be a strong and broad area of low pressure that will sit over the northern borders. Zonal flow along the southern borders will capture some of the cooler air from the northern low and drive it west to east into Saskatchewan. Thursday’s high in Calgary will be 10 degrees colder than the high on Wednesday, and by Saturday, the overnight lows will sit around 4 C. The normal range in Calgary this time of year is 19 C for a daily high and 5 C for the low. There will be little chance for improvement for the next week and a half, with Calgary’s peak temperatures sitting between 11 C and 15 C. More rain is possible in Calgary on Thursday and Friday, but heavier accumulations are likely west of Edmonton and along the northern edge of the Rockies.
