A bumpy temperature trend for Calgary over the next few days

We will get above 25 C this coming Wednesday, and again on Sunday, possibly. Then, a long wait begins before we see it again. This is not to say that we're immediately plunging to the negatives; but look at Friday's low temperature down below. We're going to be cooling off dramatically soon, compared to where we've been of late. The coming wave is something of a preamble; a colossal ridge of high pressure is setting up directly atop us, causing a wave of cool air from the Northwest Territories t