How do you calculate the elevation at which clouds will form (lifting condensation level)?
ANSWER:
$h={\Delta}t/{\Delta}l$
$h=$ height of LCL (unit depends on unit height of lapse rates)
${\Delta}t=T-T_d$
${\Delta}l=l_t-l_d$
$T$ is surface temp (deg)
$T_d$ is surface dewpoint temp (deg)
${\Delta}l=$ difference between lapse rates (deg)
$l_t=$ dry adiabatic lapse rate of temperature (deg/unit height)
$l_d=$ lapse rate of the saturation mixing ratio corresponding to the surface dewpoint (deg/unit height)