Supercell Composite Parameter

Supercell Composite Parameter

A multi-parameter index that includes effective SRH, muCAPE, and effective bulk shear. Each parameter is normalized to supercell "threshold" values. Effective SRH is divided by 50 m2/s2, muCAPE is divided by 1000 J/kg, and effective bulk shear is divided by 20 m/s in the shear range of 10-20 m/s. Effective bulk shear less than 10 m/s is set to zero, and effective bulk shear greater than 20 m/s is set to one.

This index is formulated as follows:

SCP = (muCAPE / 1000 J/kg) * (ESRH / 50 m2/s2) * (ESHEAR / 20 m/s)

For example, an ESRH of 300 m2/s2, muCAPE of 3000 J/kg, and ESHEAR of 20 m/s results in a supercell composite index of 18. Only positive values of SCP are displayed on the SPC mesoanalysis page.