Pitching shut outs for the month of December I think hurts NW burbs and RFD moreso than metro LOT and further SE. Most winters we generally jump out to a head start due to the warm lake being a negative influence for you. ORD catches up and surpasses RFD due to lake enhancement and LES as winter progresses. Also the fact we haven't had any classic amped up,negative tilt storms deepening as they track through Indy into lower MI that bring mixing up to southern LOT but heavy snow further NW has been somewhat unusual