Sounding plotted on skew-T diagram

Question

This sounding comes from the July 14, 2002 severe thunderstorm outbreak in southeast Arizona.

Estimate the maximum parcel level (MPL) for a surface parcel that became convectively buoyant after it was lifted to its LFC. Enter your answer in the text box below, then click Done.

MPL (lifted) = hPa   

Answer: about 115 hPa
From the LFC, a parcel rises convectively to an equilibrium level just above 200 hPa. This buoyant ascent generates the positive area, shown in orange. As the parcel continues to rise along a saturation adiabat above the EL, it generates a growing negative area, shown in blue. The maximum parcel level (MPL) lies where the negative area equals the positive area. In this case, we estimate that the MPL lies at about 115 hPa.
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