CAPE above a specific height

[Dan Leins]

All,

I'm trying to produce some "aviation relevant" forecast images from my WRF
model runs. Surface based CAPE, 0-90mb ml, 0-180mb ml, and 0-255mb ml CAPE
are all available explicitly from the model, however I was wondering if
there was a way for me to draw plots of CAPE above a certain height, i.e
500mb, or 5000m, or even better above a given temperature (freezing level or
-20C height). I've gone back and forth trying to figure out how to
accomplish this, however so far I've come up empty.

Given the 4 model forecasts of CAPE contained within my grib file, is what
I'm trying to accomplish even plausible or would I need to have CAPE for
each model layer within my grib file?

Thanks,
Dan
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