A blast of arctic air is on the way. It's early in the season, but the conditions are right for the cold air to push far enough south to clear the Gulf Coast.
Winter cold is reinforced by early cold air masses, and even if the rest of Winter is relatively mild, the rest of the season will reflect the early cold.
For those in the colder parts of the United States, it might be another season of misery. I hope not, but it's not looking good at this time.