Surface-Based CAPE/CIN (J kg-1)
SBCAPE (Surface-Based Convective Available Potential Energy) is a measure of instability in the troposphere. This value represents the total amount of potential energy available to a parcel of air originating at the surface and being lifted to its level of free convection (LFC). No parcel entrainment is considered. The CAPE and CIN calculations use the virtual temperature correction.
CIN (Convective INhibition) represents the "negative" area on a sounding that must be overcome before storm initiation can occur.