After a great weekend of weather, the tide will begin to change for the work week. Monday will be what we call a "transition day." Winds out of the southwest on Sunday will transition to the west for the overnight hours, and eventually slide to the northwest for the day on Monday.
There will be a few scattered snow showers around the Black Hills. Most places in the area can expect anywhere from a dusting to an inch. Slightly higher accumulations are likely in northeast Wyoming, between 1-3 inches. The winds will drive in much cooler air. High temperatures will top out right around 30°F, and that will occur late in the morning or early in the afternoon. Winds gusting around 40 mph will drop temperatures into the teens and single digits for Tuesday morning.
Very cold Canadian air will settle in for the middle portion of the week. High temperatures on Tuesday will only top out in the single digits and teens throughout the area. By Wednesday morning, some locations will dip below zero!
Models are hinting at warmer temperatures, possibly back above 30°F moving in by next weekend.