It's a cooler start to the morning in KELOLAND with temperatures in the mid 40s in Aberdeen. Areas in the south are warmer with mid to upper 50s and more clouds. In fact, rain has developed in southwestern SD. Chances of rain will stay mainly south of I-90 today, part of a trend that will continue the next few days. Temperatures will climb into the lower 70s today in most of KELOLAND.
Showers and thunderstorms are possible tonight in southern KELOLAND, mainly south of I-90. The chances of rain will be much higher along the South Dakota and Nebraska border. Overnight lows should be in the upper 40s in Aberdeen where dry weather is expected. Sioux Falls and and the south will be in the mid to upper 50s.
The story will remain about the same tomorrow with good chances of rain in far southern KELOLAND. This boundary will slowly drift north tomorrow night and Thursday, allowing the rain to expand farther north. Because of repeated chances of rain, flash flooding will be possible across parts of northeastern Nebraska and northwestern Iowa. There is some chance this threat may affect far southeast South Dakota as well. Right now Sioux Falls is on the northern edge of the heavy rain forecast.
Amounts of rain the next 72 hours could be 2-4" in the heaviest areas. Sioux Falls is still on the lower end of that range, but an inch or more is still possible given the latest data trends.
A drier forecast is ahead for Friday and Saturday and temperatures are looking warmer. We are expected widespread 80s in the forecast, with the next chance of rain holding off until Sunday or Sunday night.