Sioux Falls, SD
First, the weather is warmer this morning as temperatures have been rising through the 30s and 40s in most areas. Temperatures still dipped below freezing in much of western MN and northwestern IA. Highs today will range from the mid 50s in the east to the mid to upper 60s in the west. Rain will become likely and we are tracking that rain on KELOLAND Live Doppler HD moving in from Nebraska. Sioux Falls will have about a 50% chance of showers and isolated t-storms this afternoon.
More areas of rain are likely tonight, mainly East River. Lows will hold in the lower to middle 40s in the east, with cooler upper 30s in Rapid City and northwest winds developing behind another cold front. Most of the rain on Friday will be along and ahead of that front. Sioux Falls should make it to 67 with the best chance of rain in the morning. Isolated t-storm activity will possible late in the day as the air will become more unstable in MN and IA.
The weekend is still looking unsettled as a series of upper-air disturbances move in from the southwest. I don’t think it will rain all weekend, but we’ll need to watch the timing of each individual disturbance. Saturday night may present some opportunities for thunder in the south with highs near 70 in Sioux Falls. That system will be followed by the main storm Sunday night and Monday. This one will drag in colder air and many of the long- range computer models are now switching the rain to snow on Monday, with some accumulation possible in KELOLAND. I’ll be pretty generic on the forecast for now as many things have to come together for snow, but it is certainly looking more likely we’ll be dealing with more winter weather.