ECMWF showing potential for cold blast into Great Lakes; Could Winter be near?

The latest ECMWF model is showing two strong low pressure systems quickly putting an end to the 80's currently being reached over the Midwest and instead bringing in potentially temperatures near freezing levels. With the forecasted strength of these two lows, I wouldn't be surprised if it turned out. The eventual strength may depend on the forecast tropical system that may develop in the Florida region and potentially move inland at some point.