December 2025 Short/Medium Range Forecast Thread

[*Flash*]

I think the January thaw can be overly used sometimes, almost in almanac-y fashion. Even the best winters had their patented patterns relax a time or two; granted, I get how a transition into pause can be unsettling. Apart from present timing, I'm not bummed about a reload due to its necessity and how much we've historically benefited from them. Assuming the upcoming warm spell is overhyped, I could see monthly temps verifying close to average for most, maybe a little above average for west/middle TN. 

Also, I agree with the idea we'll flip cold at some point in January. May not be seasonal climax level but perhaps the start of a stairstep into glory. I know for me, times like these latch my hopes to analogs. For instance, if you like second half loaded winters, our latitude is a place to be as we've seen plenty of them the past decade (I.e. 2014-15 and 2020-21). Those examples saw some gnashing of teeth in the first half before things went gangbusters in the second. Not to suggest this winter is like those winters or anything we've seen the past decade. Certainly, this year feels unique already with our closest saving grace being on the Atlantic side, not the Pacific. Go back and review past winter threads and you'll see how the PNA/WPO/EPO were highly discussed along with the MJO. Per Michael Scott, oh, how the turned tables. 

Whatever transpires in the short term, let the record show I don't ask for much but amplification, volatility, and any west-based retrograding on those strat/Atlantic teleconnections. Winters with trackable systems within multi-week ebb and flows are my favorite. 

[beavis1729]

Speaking for myself on the chinook discussion, I didn’t intend to imply that it would directly affect us with warmth for a long period of time. The problem, in my mind, is the existence of the chinook pattern itself, even though it has really only caused warmth in MT, CO, WY, NE, SD. This has been going on for several weeks. Places like Denver, Cheyenne, and Rapid City have essentially had no winter so far, and unfortunately that looks to continue for the rest of the month. 

Joe Bastardi, or perhaps a different met, has a saying about “the angle of the cold”. In a chinook pattern, the angle of the cold is wrong for us, for two reasons. First, even when it does stay cold here, it’s very dry and boring due to NW flow. Second, the warmth is always lurking, because we’re on the far western edge of the cold airmass. So, any minor change in the flow quickly makes it warmer here. That happened last week in my neck of the woods, where a couple of good early season snowfalls melted away because the warmth out west pivoted over here…even though it only lasted for a few days. 

The point of all this is that, to me, it’s a much better pattern for all of us when there is no chinook at all. I like to see highs come down into the western plains, creating upslope snow in MT/WY/CO, then the cold eventually trickles east and lasts for awhile. Basically, I’m describing a -EPO from a more “on the ground” perspective. 

I just think the current pattern (starting around 12/5) has been very obnoxious, and unfortunately it looks to continue for 10 more days. Definitely good to see some light at the end of the tunnel, and it can’t come soon enough.