That is one hell of a blue norther preceding the storm genesis. 1060 high diving into the US and that front just races along the front range to the Mexican border.
Just to help you out a little here...find the triple point in that map you posted. That'll show you where your warm conveyor/sector is. The cold front is through Philly by that point. They're just in some backside/ULL snows with CAA from the SW.