diff --git a/physics/cu_c3_deep.F90 b/physics/cu_c3_deep.F90
index 7e907aaba..b7cd5f62d 100644
--- a/physics/cu_c3_deep.F90
+++ b/physics/cu_c3_deep.F90
@@ -5758,7 +5758,7 @@ subroutine calculate_updraft_velocity(its,itf,ktf,ite,kts,kte,ierr,progsigma,
     do k = 2, ktf-1
        do i = 1, itf
          if (ierr(i)==0) then
-           if(k >= kbcon(i) .and. k < ktcon(i) .and. dbyo(i,k)>0.)then
+           if(k >= kbcon(i) .and. k < ktcon(i))then
               gamma   = el2orc * qeso(i,k+1) / (to(i,k+1)**2)
               if(k >= kbcon(i) .and. clw_all(i,k)>0.)then
                buo(i,k) = buo(i,k) - g * qlk(i,k)  
diff --git a/physics/cu_c3_driver.F90 b/physics/cu_c3_driver.F90
index 0ecb81750..5b6be1d6c 100644
--- a/physics/cu_c3_driver.F90
+++ b/physics/cu_c3_driver.F90
@@ -58,7 +58,7 @@ end subroutine cu_c3_driver_init
 !!
 !>\section gen_c3_driver Grell-Freitas Cumulus Scheme Driver General Algorithm
       subroutine cu_c3_driver_run(ntracer,garea,im,km,dt,flag_init,flag_restart,&
-               do_ca,progsigma,cactiv,cactiv_m,g,cp,fv,r_d,xlv,r_v,forcet,      &
+               do_ca,progsigma,cnx,cactiv,cactiv_m,g,cp,fv,r_d,xlv,r_v,forcet,  &
                forceqv_spechum,phil,delp,raincv,tmf,qmicro,sigmain,             &
                betascu,betamcu,betadcu,qv_spechum,t,cld1d,us,vs,t2di,w,         &
                qv2di_spechum,p2di,psuri,                                        &
@@ -93,14 +93,14 @@ subroutine cu_c3_driver_run(ntracer,garea,im,km,dt,flag_init,flag_restart,&
       integer            :: ishallow_g3 ! depend on imfshalcnv
 !-------------------------------------------------------------
    integer      :: its,ite, jts,jte, kts,kte
-   integer, intent(in   ) :: im,km,ntracer
+   integer, intent(in   ) :: im,km,ntracer,cnx
    integer, intent(in   ) :: ichoice_in,ichoicem_in,ichoice_s_in
    logical, intent(in   ) :: flag_init, flag_restart, do_mynnedmf
    logical, intent(in   ) :: flag_for_scnv_generic_tend,flag_for_dcnv_generic_tend, &
-        do_ca,progsigma
+        do_ca
    real (kind=kind_phys), intent(in) :: g,cp,fv,r_d,xlv,r_v,betascu,betamcu,betadcu
    logical, intent(in   ) :: ldiag3d
-
+   logical, intent(inout) :: progsigma
    real(kind=kind_phys), intent(inout)                      :: dtend(:,:,:)
 !$acc declare copy(dtend)
    integer, intent(in)                                      :: dtidx(:,:), &
@@ -280,6 +280,14 @@ subroutine cu_c3_driver_run(ntracer,garea,im,km,dt,flag_init,flag_restart,&
 !$acc end kernels
      endif
 
+
+     if(progsigma)then
+        if(cnx < 384)then
+           progsigma=.false.
+           write(*,*)'Forcing prognostic closure to .false. due to coarse resolution'
+        endif
+     endif
+
      if(ldiag3d) then
        if(flag_for_dcnv_generic_tend) then
          cliw_deep_idx=0
diff --git a/physics/cu_c3_driver.meta b/physics/cu_c3_driver.meta
index e02116243..71a785318 100644
--- a/physics/cu_c3_driver.meta
+++ b/physics/cu_c3_driver.meta
@@ -133,6 +133,13 @@
   units = flag
   dimensions = ()
   type = logical
+  intent = inout
+[cnx]
+  standard_name = number_of_x_points_for_current_cubed_sphere_tile
+  long_name = number of points in x direction for this cubed sphere face
+  units = count
+  dimensions = ()
+  type = integer
   intent = in	
 [cactiv]
   standard_name = counter_for_grell_freitas_convection