For the short-term, we are getting a cool-down! A front moves in tonight and tomorrow, and it will bring scattered showers and "normal" temps for this time of year! Tomorrow will be a gray day, with occasional light rain and temp back into the 50's for highs. We'll keep clouds around and temps will be their chilliest on Thursday. By Friday-Sunday we'll get a big rebound in temps!
As for some REALLY cold air... we'll it's up in Canada! Check out the attached temp map, showing daytime temps in the negative numbers for many spots. This cold air will continue to build, which is usually a good thing if you are hoping for a big arctic outbreak in the southeast. To get the cold air to move south, however, we need a favorable jet stream pattern. That could be in the cards if the NAO (North Atlantic Oscillation) goes negative as predicted. We've talked about the NAO on here before... it refers to pressure changes in the Icelandic Low and the Azores High pressure and the jet flow that results. Long story short, when the NAO is negative, this provides the pathway for some serious cold-air spillage into the eastern U.S. According to the forecast I attached to this post, the NAO would potentially go negative in about a week or so. Our computer models are hinting at some colder air next week, but it doesn't seem to be very dramatic at this point. We'll see how this all shapes up, but with Canada getting colder and colder, and our pattern potentially changing, we could be looking at some VERY wintry feeling air arriving closer to Christmas. Stay tuned!!!