diff --git a/do_landDA.sh b/do_landDA.sh
index 0d397b4..7fefae9 100755
--- a/do_landDA.sh
+++ b/do_landDA.sh
@@ -136,8 +136,10 @@ do
      obsfile=$OBSDIR/snow_depth/GTS/data_proc/${YYYY}${MM}/adpsfc_snow_${YYYY}${MM}${DD}${HH}.nc4
   # GHCN are time-stamped at 18. If assimilating at 00, need to use previous day's obs, so that
   # obs are within DA window.
-  elif [ ${OBS_TYPES[$ii]} == "GHCN" ]; then 
-     obsfile=$OBSDIR/snow_depth/GHCN/data_proc/v3/${YYYY}/fake_ghcn_snwd_ioda_${YYYP}${MP}${DP}.nc
+  elif [ $atmos_forc == "era5" ] && [ ${OBS_TYPES[$ii]} == "GHCN" ]; then
+     obsfile=$OBSDIR/snow_depth/GHCN/data_proc/v3/${YYYY}/ghcn_snwd_ioda_${YYYP}${MP}${DP}.nc
+  elif [ $atmos_forc == "gswp3" ] && [ ${OBS_TYPES[$ii]} == "GHCN" ]; then
+     obsfile=$OBSDIR/snow_depth/GHCN/data_proc/v3/${YYYY}/fake_ghcn_snwd_ioda_${YYYP}${MP}${DP}.nc  
   elif [ ${OBS_TYPES[$ii]} == "SYNTH" ]; then 
      obsfile=$OBSDIR/synthetic_noahmp/IODA.synthetic_gswp_obs.${YYYY}${MM}${DD}${HH}.nc
   else