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Showalter Index
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What does my answer mean?
Showalter Index greater than 0: Stable, but weak
convection possible for SI = 1-2 if strong lifting is present.
Showalter Index between 0 and -3: Moderately unstable.
Showalter Index between -4 and -6: Very Unstable.
Showalter Index between less than -6: Extremely Unstable.
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