CONDITIONAL SYMMETRIC INSTABILITY IS FAVORED UNDER THE FOLLOWING CONDITIONS
• UNDER LARGE VERTICAL WIND SHEAR – THIS WILL CAUSE M.G SURFACES TO BE RELATIVELY HORIZONTAL
• LARGE ANTICYCLONIC WIND SHEAR – ABSOLUTE VORTICITY WILL APPROACH ZERO AT THE LEVEL WHERE CSI IS OCCURRING – THIS PRODUCES WEAK INERTIAL STABILITY
• LOW STATIC STABILITY – ISENTROPIC SURFACE AND MORE IMPORTANTLY THE EQUIVALENT POTENTIAL TEMPERATURE SURFACE BECOMES ALMOST VERTICAL
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From Bluestein (1986)