Skies will remain mostly clear as we go through the evening and tonight. Lows will fall to the forties to near fifty with light winds.
Wednesday will be another warm day with highs in the seventies to near eighty. Scattered showers and storms will be possible in eastern KELOLAND after 3:00; dry skies will prevail in central and western South Dakota.
Changes come on Thursday. Lows pressure will develop in the plains of the central United States and will move through KELOLAND. This will bring widespread rain to the area. The rain will start in western South Dakota then move east. Along with the rain, temperatures will be much cooler with highs in the fifties and sixties.
Rain will continue into Friday with increasing north winds. The winds will help usher in cold air with many areas having steady or slowly falling temps throughout the day. Model rain amounts on Friday are ranging from near a half inch in southeast KELOLAND to over two inches in western South Dakota (including Rapid City). The rain will mix with and switch to snow Friday night in central and western South Dakota. The majority of the snow will fall as the system is leaving, so the amounts shouldn’t be too substantial. But an area of one to three inches will be possible for central and western KELOLAND (higher in the Hills).
Dry skies will be likely in central and western South Dakota on Saturday while eastern KELOLAND will still contend with a cold rain. Highs on Saturday will only be in the thirties and forties.
As the system clears KELOLAND, Sunday morning will be cold with temps in the twenties and thirties. Sunday afternoon will remain well below average with highs in the forties and fifties, but the temps will slowly warm early next week.