A potential nor’easter will affect the East late this week, bringing plummeting temperatures, rain and first snowfall to parts of the Northeast and mid-Atlantic. Models are still in disagreement as to how strong this system will be and where it will go, which will affect who sees snow and who sees rain. Regardless, much of the East will see temperatures drop, including first frosts and freezes dipping into the South. Senior meteorologist Jonathan Erdman breaks down what could happen.