No doubts that the month of September (supposed to be the start of Meteorological Autumn) will start very warm and largely humid through the upcoming Labor Day weekend. We will have to watch for a few storms to develop later Tuesday, some of which may be severe near/south of I-90. Otherwise, another fairly good chance for storms on Wednesday night, mainly east of I-29, before we shift back toward more isolated threats with continued hot and humid days.
Data Courtesy of Sioux Falls Weather Forecast Office