17 September 18 - short term

12Z GFS run at 96 hours from https://weather.cod.edu/forecast/

for first 12-72 hours pattern in midwest in relatively stable - stalled frontal boundary currently stationed over minnesota and south dakota, not expected to move much, much colder temperatures north of frontal boundary. warmer south of boundary due to strong southwesterly flow

cold front begins to move by thursday evening, low pressure in colorado begins to head northwest and strengthen due to strong upper-level flow, cooler temperatures in indiana by friday, along with chance of rain