Saturday provided a textbook example of a temperature inversion. An inversion is an increase in temperature with height. The high temperature at the airport was in the mid 20s, but on the west side of Rapid City, which is higher elevated at the base of the Black Hills, temperatures surged into the 40s.
Warm air and lots of sunshine is in the forecast for Sunday. Once again, there will be a large spread in high temperatures. They will range from the 40s in the Black Hills to 20s northeast of the Black Hills where the deep snow will limit the warmth.
We will have a warmer than average week, and we'll likely see some 50s popping up in the eastern slopes of the Black Hills, including Rapid City. That hasn't happened since Thanksgiving weekend.
Cooler air will eventually spoil the party next weekend, bringing a chance for some snow as we move into next weekend.