Modified also to be more resistent to strong upper level shear. ALso higher contribution to index when bulk Richardson numbers lie between 25 and 80. These changes have ben based on recent comparisons with observations indicating these dependences were less important. The result will be the tendency to produce higher peak Super Cell indicies. Mean Sea Level Pressure Scheme Scheme to calculate mean sea level pressure changed to better match that used by NCEP models.
Biggest change is in reduction temperature that now assumes constant theta.
We continue to use the surface horizontal component of the geostrophic wind to extrapolate downward normalizing by the potential temperature coefficient.