Yea, max band...that is how I interpret them.....they convey the potential where lift and OMEGA are married optimally within the SGZ, but obviously that won't be realized ubiquitously.
Here it comes....you heard it here first last fall.
https://www.severe-weather.eu/global-weather/polar-vortex-collapse-stratospheric-warming-february-2026-cold-united-states-canada-europe-fa/