dewp2m = dew point temperature at 2m above ground [K]
tmp2m = temperature at 2m above ground [K]
pressfc = surface pressure [Pa]

*Temperature at LCL
'define tlcl=(((1/(1/(dewp2m-56)+log((tmp2m/dewp2m))/800))+56)-273.16)'
*Pressure at LCL
'define plcl=(pressfc*pow(((tlcl+273.16)/tmp2m),(7/2)))/100'