We’ve had a pattern lately with the subtropical and polar jet were seen in the Continental US, but now, there is only one strong jet rising and falling through the country. Instead of winter weather, though, it is bringing a strong ridge in from the west coast, which is going to lead to a pretty warm middle of December.
A sluggish start to the weekend
A look at the Aviation Weather page shows a lot of red and purple dots, which means IFR and Low IFR conditions. These conditions are tied to low visibility or low clouds, that make landing difficult without instruments (that is what the I stands for). A look at the satellite imagery would show that this has less to do with clouds, and more to do with widespread fog, giving us a gray and dismal start for the weekend to a lot of people.