4WX Weather Calculators and converters

Showalter Index

Enter the temperatures that you would like:
Enter the 500 millibar parcel temperature: C Answers:
Enter the 500 millibar environmental temperature: C

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.


What is the formula for the Showatler Index?

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