Stability Assessment » Lifted Index (LI) Skew-T Procedure

- Find the mean temperature (T) and dewpoint (Td) in the lowest 100 hPa.
- From those mean T and Td, located at the midpoint of the layer, find the LCL.
- From those mean T and Td, located at the midpoint of the layer, find the LCL.
- From the LCL lift the parcel moist-adiabatically to 500 hPa and find the parcel temperature (T′).
- From the LCL lift the parcel moist-adiabatically to 500 hPa and find the parcel temperature (T′).
- Given the 500 hPa sounding temperature (T500), LI is computed as follows:
LI = T500 - T′