supercell_composite

metpy.calc.supercell_composite(mucape, effective_storm_helicity, effective_shear)

Calculate the supercell composite parameter.

The supercell composite parameter is designed to identify environments favorable for the development of supercells, and is calculated using the formula developed by [Thompson2004]:

$$\text{SCP}=\frac{\text{MUCAPE}}{1000\text{J/kg}}\ast \frac{\text{Effective SRH}}{50{\text{m}}^2/{\text{s}}^2}\ast \frac{\text{Effective Shear}}{20\text{m/s}}$$

The effective_shear term is set to zero below 10 m/s and capped at 1 when effective_shear exceeds 20 m/s.

Parameters

• mucape (pint.Quantity) – Most-unstable CAPE

• effective_storm_helicity (pint.Quantity) – Effective-layer storm-relative helicity

• effective_shear (pint.Quantity) – Effective bulk shear

Returns

pint.Quantity – Supercell composite

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storm_relative_helicity

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surface_based_cape_cin