Well, well, well, what have we here? Chaser friends are abuzz with a late December chase possibility. I will, of course, be enjoying the company of my family seemingly above the Arctic Circle in Montana. If the models verify, we will have a strong weather-maker crossing the CONUS. It looks squall line-ish, but you can't rule out some spin-ups, especially if we can work out some supes just ahead of it. It will be interesting to watch for the next few days.
SPC even has a Day 5 out on the situation already. I haven't seen one of those in at least a month.
And one final thought ... current tropical activity.
Satellite imagery used with permission; courtesy of IPS Meteostar Inc. Click for larger images.