The massive cold front that will blast across the East and Plains will bring a change to much colder weather for a couple of days. The front will also bring snow per previous posts. As cold air builds-up along the west slopes of the Appalachians early Wednesday, temperatures east of the Appalachians will warm into the 60s and 70s. The difference in temperatures across the Appalachians will be 30-40 degrees by midday Wednesday. When the cold air comes up and over the Appalachians then blast down the east slopes, a line of low-topped thunderstorms will develop that can produce wind gusts over 40 mph. I will not be surprised to see gusts 60-70 mph across the Mid-Atlantic during the passage of the front. SPC has a marginal risk right now but will most likely upgrade to a slight risk tomorrow or Wednesday morning.