Fix up Showalter Index calculation #2007
Merged
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Description Of Changes
This was incorrectly lifting a surface parcel to the LCL calculated from the 850 point. Instead, eliminate all of the manual calculation and just use parcel_profile. The new values are with 1% of those from Wyoming--which is now what's used in the test (the original test value was off by 50% of the new value). Also fix the function parameter name (
dewpt
->dewpoint
) and clean up a bit of the docstring.Checklist