It is Monday afternoon. In 48 hours we are supposed to see a very strong cold front here. I am looking at the current surface analysis and winds aloft and it is not obvious to me how the meterologists perform their craft. Here is a map of the US with my location annotated, plus a sketch of what the typical cold front looks like when it gets here. Can anyone show me a NWS chart that has telltale indications of the approaching cold weather?