Warm westerly winds really intensified late Tuesday and continued into Wednesday morning.
Peak gusts on Tuesday night were over 60 km/h and temperatures jumped up to 9 C around 9 p.m.
As of 6 a.m. Wednesday, the air temperature in Calgary was 6 C, which exceeds a normal daytime high this time of year, and surpasses the average overnight low by 21 degrees.
On a typical day across the mid-latitudes, the coldest temperatures of the day occur overnight under the absence of incoming solar radiation.
In Calgary, the average overnight low this time of year is -15 C, with a daytime high of -3 C.
The western edge of an exiting surface low across Saskatchewan is introducing cooler air from the northwest to southeast corners of Alberta.
Where the aforementioned westerly flow has caught up to the Saskatchewan low, rain and mixed precipitation have formed.
More mixed precipitation is likely …