diff --git a/src/Core/cld_sub_mod.f90 b/src/Core/cld_sub_mod.f90
index 615504b..650cb2b 100644
--- a/src/Core/cld_sub_mod.f90
+++ b/src/Core/cld_sub_mod.f90
@@ -10,12 +10,18 @@ MODULE CLD_SUB_MOD
 
       IMPLICIT NONE
 
+      ! Public driver
       PUBLIC  :: CLOUD_JX
 
+      ! Used locally for cloud flags 5, 6, 7, 8
       PRIVATE :: ICA_NR
       PRIVATE :: ICA_ALL
       PRIVATE :: ICA_III
+
+      ! Use locally for cloud flags 6 and 7
       PRIVATE :: ICA_QUD
+
+      ! Not used
       PRIVATE :: HEAPSORT_A
 
       CONTAINS
@@ -284,10 +290,17 @@ SUBROUTINE CLOUD_JX (U0,SZA,RFL,SOLF,LPRTJ,PPP,ZZZ,TTT,HHH,DDD,  &
                IRANX = mod (IRAN+N-1, NRAN_) + 1
                XRAN = RAN4(IRANX)
                I = 1
+               ! ewl debug: Cloud-J gets I = 4 for cldflg5, GC I = 1?
+               ! XRAN     :
+               ! OCDFS(I) :
+               ! NICA     :
                do while (XRAN .gt. OCDFS(I) .and. I .lt. NICA)
                   I = I+1
                enddo
 
+               ! ewl debug: what happens if I set I to 4? Still runs...
+               !I = 4
+
                call ICA_III( LPRTJ0, CLT,  LTOP, CBIN_, I,    NCLDF, GFNR, &
                              GNR,    GBOT, GTOP, NRG,   NICA, TTCOL )
 
@@ -304,6 +317,17 @@ SUBROUTINE CLOUD_JX (U0,SZA,RFL,SOLF,LPRTJ,PPP,ZZZ,TTT,HHH,DDD,  &
                enddo
 
                if(LPRTJ0) then
+                  ! ewl debug: trying to figure out why GC printing 1, 1, 0.0
+                  ! and then nothing in the loop....
+                  ! N       : iterator of NRANDO (1:50)
+                  ! I       : Set earlier in while loop. 4 in cloud-j
+                  ! OCOL(I) : Computed in ICA_ALL earlier. Too low!
+                  ! LTOP    : 34 levels??
+                  ! TTCOL(L): Computed in ICA_III earlier
+                  ! LWPX(L) : Set to LWP (input arg) unless TTCOL(L) < 1.d-8
+                  ! IWPX(L) : Set to IWP (input arg) unless TTCOL(L) < 1.d-8
+                  print *, "ewl in cloud-j: LTOP: ", LTOP
+
                   write(6,'(a,2i6,f8.3)') ' pick random ICA:',N,I,OCOL(I)
                   do L = 1,LTOP
                      if (TTCOL(L) .ge. 1.d-8) then
@@ -617,6 +641,17 @@ SUBROUTINE ICA_NR(LPRTJ0,CLDF,CLTAU,IWPX,LWPX,ZZZ,CLDIW,LTOP,CBIN_, &
 !                 N=19=[90-95%],N=20=[95-100%]
 !---assume the upper end of the range and renormalize in-cloud TAU to preserve
 !     CLDF*TAU
+
+      ! Debug prints of inputs
+      if ( LPRTJ0 ) then
+         print *, "ICA_NR inputs:"
+         print *, "   - LTOP, CBIN_, ICA_: ", LTOP, CBIN_, ICA_
+         do L=1,LTOP
+            print *, "   - 1:LTOP loop, CLDIW(L), CLDF(L), ZZZ(L): ", &
+                     L, CLDIW(L), CLDF(L), ZZZ(L)
+         enddo
+      endif
+
         FBIN = CBIN_
       do K = 1,CBIN_
         CFBIN(K) = float(K) / FBIN
@@ -950,6 +985,23 @@ SUBROUTINE ICA_ALL(LPRTJ0,CLF,CLT,LTOP,CBINU,ICAU, CFBIN,CLDCOR,NCLDF,  &
       integer I, II, IG1,IG2, G, L,  IGNR(10),GCLDY(10),GRP1,GRP2
       logical L_CLR1,L_CLR2  ,LSKIP   ,LGR_CLR(10)
 !-----------------------------------------------------------------------
+
+      ! Debug prints of inputs
+      if ( LPRTJ0 ) then
+         print *, "ICA_ALL inputs:"
+         print *, "   - LTOP, CBINU, ICAU, NRG, NICA, CLDCOR: ", LTOP, CBINU, ICAU, NRG, NICA, CLDCOR
+         do L=1,LTOP
+            print *, "   - 1:LTOP loop, NCLDF(L): ", L, NCLDF(L)
+         enddo
+         do L=1,CBINU
+            print *, "   - 1:CBINU loop, CFBIN: ", L, CFBIN(L)
+         enddo
+         do L=1,9
+            print *, "   - 1:9 loop, GBOT, GTOP, GLVL, GNR, GCMX, GFNR(L,1): ", &
+                     L, GBOT(L), GTOP(L), GLVL(L), GNR(L), GCMX(L), GFNR(L,1)
+         enddo
+      endif
+
         CLTOT(:) = 0.d0
 
         CF0(1) = 0.d0
@@ -1078,6 +1130,24 @@ SUBROUTINE ICA_III(LPRTJ0, CLT,  LTOP, CBINU, III,  NCLDF, GFNR, &
 
       integer II, IG, G, L
 !-----------------------------------------------------------------------
+
+      ! Debug prints of inputs
+      if ( LPRTJ0 ) then
+         print *, "ICA_III inputs:"
+         print *, "   - LTOP, CBINU, NRG, NICA, III, NCLDF: ", &
+                  LTOP, CBINU, NRG, NICA, III, NCLDF
+         do L=1,LTOP
+            print *, "   - L, NCLDF(L): ", L, NCLDF(L)
+         enddo
+         do L=1,CBINU
+            print *, "   - 1:CBINU loop, GFNR(1,CBINU): ", L, GFNR(1,L)
+         enddo
+         do L=1,9
+            print *, "   - 1:9 loop, GBOT, GTOP, GNR: ", &
+                     L, GBOT(L), GTOP(L), GNR(L)
+         enddo
+      endif
+
          TTCOL(:) = 0.d0
       II = max(1, min(NICA,III))
       do G = 1,NRG