THERE HAS BEEN NO CHANGE in the 500 MB structure of the GFS between 18z and 12z. 12z on the left, 18z on the right. Note the 546 dm is at the exact same location, there there has been no push south of the trough The only diff is a lob of Vorticity in PA is a little south. pic.twitter.com/ntmhQYU8Hw

— Bernie Rayno (@AccuRayno) February 11, 2024