What system are you talking about? There's currently a thread regarding the upper trough and associated surface low forecast to move across Texas and the Gulf coast early to mid next week, but I'm not sure that's the "Midwest" storm you mention. Otherwise, looking at the models, there doesn't appear to be anything more organized than a couple of clipper-type systems moving near the US - Canada border region. There is a good chance of a coastal-type low (weak Nor'easter perhaps ahead of the upper-level trough during the Tues-Thurs timeframe next week), but that wouldn't affect Midwestern states. The GFS is showing another very deep trough cutting-off across the far south-central US (deep Texas) by the end of next week, but that's a very long ways out.