Comparison of heights and height tendencies from the 12Z GFS output valid 0Z Tuesday with three historic Plains outbreaks: 4/26/91, 3/13/90, 4/14/12. Height falls are all on the same scale (shaded is signed 20-60 m over six hour period prior to 0Z). pic.twitter.com/vbMUoLBG8k

— Jim Tang (@wxmann) April 11, 2022