Let's start off in the short term - just 48 hours away.
— Tomer Burg (@burgwx) January 2, 2024
This loop shows 500mb vorticity trend over the last 12 runs - there's a broad trough in the southwest US, but what has changed is the orientation of a shear vorticity lobe extending to its west, now oriented north-south. pic.twitter.com/oOdliz6Trs