
  Simple hurricane boundary layer (HBL) using single column modeling (SCM) 
  following Bryan et al (2017, BLM, pg 475) and Chen et al. (2021, JAS, 
  pg 3559).

  cm1r19.10:  added a nudging term for theta and qv, and turned on moisture.
  Allows for stratification and surface heat fluxes.  

