A powerful but dry cold front plowed through South Dakota last night. We’re not bitterly cold by any means, but it’s going to be noticeably cooler today. Here’s the great news: we have ample sunshine for most both days this weekend. Today will be 15-20° cooler today, as compared to yesterday. There will be some patchy clouds but a strong core of high pressure moves in this afternoon. That will cool us down tonight as winds slacken. A warm push of air arrives from the south tomorrow, just in time for a one-day fall bonus. After that, it’s a whole new pattern with more active weather.
A new system comes into the Black Hills of SD early Monday morning. While it may start as snow, there will be some mixing of precip types. Almost all computer models throw in some slushy mess by later in the day Monday. There isn’t a tremendous amount of moisture with this system but a few inches of snow are certainly possible (at least at elevation). This moves east by early Tuesday towards Pierre, where moisture is more limited. Sioux Falls and Aberdeen have a slimmer chance of this FIRST storm. Another moves into the southeast corner fairly early on Wednesday. This will primarily be very cold rain but, since this storm is larger, it will pull more cold air in from Canada. On the western edge, some snow could cut in as the system exits.
There should be a slight warming trend as the week winds down, but from this point, it won’t be breaking any records.