diff --git a/src/gsi/qcmod.f90 b/src/gsi/qcmod.f90
index 4551849c7c..058ce50208 100644
--- a/src/gsi/qcmod.f90
+++ b/src/gsi/qcmod.f90
@@ -2368,20 +2368,22 @@ subroutine qc_irsnd(nchanl,is,ndat,nsig,ich,sea,land,ice,snow,luse,goessndr,airs
         endif
       end do
 
-      do i=1, nchanl                      ! use surface channel to derive cloud amount
-        m = nuchan(ich(i))
-        if ( m == isurface_chan ) then     ! interpolate cloud top temperature
-          cloud_temperature = ((tvp(lcloud) -tvp(lcloud -1)/ log(prsltmp(lcloud) / prsltmp(lcloud - 1))) &
+      if ( lcloud >= 2 ) then
+        do i=1, nchanl                      ! use surface channel to derive cloud amount
+          m = nuchan(ich(i))
+          if ( m == isurface_chan ) then     ! interpolate cloud top temperature
+            cloud_temperature = ((tvp(lcloud) -tvp(lcloud -1)/ log(prsltmp(lcloud) / prsltmp(lcloud - 1))) &
                         *log(cldp/prsltmp(lcloud-1))) + tvp(lcloud-1)
-          call crtm_planck_radiance(1,m,tb_bc(i),radiance_chan)           ! observation radiance. same as tb_obs + bias correction
-          call crtm_planck_radiance(1,m,tsim(i),radiance_model)           ! model derived radiance
-          call crtm_planck_radiance(1,m,cloud_temperature,radiance_cloud) ! cloud top temperature radiance
-          cloudp = (radiance_chan - radiance_model) / (radiance_cloud - radiance_model)
-          cloudp = min(max(cloudp,zero),one)
-          exit
-        endif   ! surface channel
-      end do
-      cldp = cldp * r10
+            call crtm_planck_radiance(1,m,tb_bc(i),radiance_chan)           ! observation radiance. same as tb_obs + bias correction
+            call crtm_planck_radiance(1,m,tsim(i),radiance_model)           ! model derived radiance
+            call crtm_planck_radiance(1,m,cloud_temperature,radiance_cloud) ! cloud top temperature radiance
+            cloudp = (radiance_chan - radiance_model) / (radiance_cloud - radiance_model)
+            cloudp = min(max(cloudp,zero),one)
+            exit
+          endif   ! surface channel
+        end do
+        cldp = cldp * r10
+      endif
     endif
   endif
 
diff --git a/src/gsi/setuprad.f90 b/src/gsi/setuprad.f90
index 5afee4b979..ca195d76e1 100644
--- a/src/gsi/setuprad.f90
+++ b/src/gsi/setuprad.f90
@@ -1164,9 +1164,9 @@ subroutine setuprad(obsLL,odiagLL,lunin,mype,aivals,stats,nchanl,nreal,nobs,&
 
         predbias=zero
         abi2km_bc = zero
-        abi2km_bc(2) = 233.5_r_kind
-        abi2km_bc(3) = 241.7_r_kind
-        abi2km_bc(4) = 250.5_r_kind
+        abi2km_bc(1) = 233.5_r_kind
+        abi2km_bc(2) = 241.7_r_kind
+        abi2km_bc(3) = 250.5_r_kind
 !$omp parallel do  schedule(dynamic,1) private(i,mm,j,k,tlap,node,bias)
         do i=1,nchanl
            mm=ich(i)