Like a massive atmospheric bowling ball, a cold dome of high pressure has rolled into the Northern Plains and our brief summer has been squashed back toward the Southwest. We sit at 28 degrees F this morning and will reach a projected high of 35 this afternoon; that's 30 degrees colder than yesterday and more than 40 degrees colder than the high of two days ago.
Since the center of this frigid dome is still up in Alberta, its surrounding, clockwise winds are coming in from the east, producing upslope conditions along the Colorado Front Range; snow showers, fog and freezing drizzle are forecast for much of the day. Suddenly, it feels like November once again.
Fortunately, this dip in the jet stream is expected to flatten out and the cold air will soon be shunted off to the east. More seasonable conditions will return for the coming week, with highs in the 50s and lows in the 30s. But alas, our fling with summer has ended.