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sci.convective-available-potential Calculator
Calculates Convective Available Potential Energy (CAPE) by integrating the buoyancy of a lifted air parcel from the Level of Free Convection to the Equilibrium Level. CAPE > 2,500 J/kg indicates extreme thunderstorm potential — supercell tornadoes require both high CAPE and significant wind shear.
Inputs
Surface Theta E K
Reference formula or conversion factor shown for context.
Mean Layer Theta E K
Arithmetic average. Sensitive to outliers — if your data has extreme values, the median may be more representative.
Parcel Temp C At 500
Reference formula or conversion factor shown for context.
Env Temp C At 500
Reference formula or conversion factor shown for context.
Results
CAPE estimate (J/kg)
The value at the specified point or condition.
CIN estimate (J/kg)
The value at the specified point or condition.
buoyancy at 500 hPa
The value at the specified point or condition.
storm potential
Sample size or count used in the calculation.
CAPE<1000
Reference formula or conversion factor shown for context.
SPC outlook
Reference formula or conversion factor shown for context.