ERA5 data (early-morning soundings) is used to calculate the Findell-Elthair diagram for each ERA5 grid column within the outer LES domain (300 x 300 km)
convective triggering potential (CTP): stability of the lower troposphere, measured by the departure o the temperature profile from moist adiabaic conditions in the region between 100 and 300 hPa above the surface.
low-level humidity index (HIlow): Sum of dewpoint depressions at 50 and 100 hPa above the surface.