diff --git a/src/Conventional_Monitor/image_gen/ush/ConMon_IG.sh b/src/Conventional_Monitor/image_gen/ush/ConMon_IG.sh
index 5573d32c..7b1377d5 100755
--- a/src/Conventional_Monitor/image_gen/ush/ConMon_IG.sh
+++ b/src/Conventional_Monitor/image_gen/ush/ConMon_IG.sh
@@ -15,7 +15,7 @@
 function usage {
   echo " "
   echo " "
-  echo "Usage:  ConMon_IG.sh suffix [-p|--pdate pdate -r|--run gdas|gfs]"
+  echo "Usage:  ConMon_IG.sh suffix [-p|--pdate pdate -r|--run gdas|gfs -n|--ncyc]"
   echo "            Suffix is the indentifier for this data source."
   echo " "
   echo "            -p | --pdate yyyymmddcc to specify the cycle to be plotted."
@@ -27,6 +27,8 @@ function usage {
   echo "                 Use only if data in TANKdir stores both runs, gdas"
   echo "                 gdas is the default value."
   echo " "
+  echo "            -n | --ncyc is the number of cycles to be used in time series plots.  If"
+  echo "              not specified the default value in parm/RadMon_user_settins will be used"
 }
 
 
@@ -38,17 +40,16 @@ echo "Begin ConMon_IG.sh"
 
 
 nargs=$#
-if [[ $nargs -lt 1 || $nargs -gt 5 ]]; then
+if [[ $nargs -lt 1 || $nargs -gt 7 ]]; then
    usage
    exit 1
 fi
 
-set -ax
-
 #-----------------------------------------------
 #  Process command line arguments
 #
 export RUN=gdas
+num_cycles=""
 
 while [[ $# -ge 1 ]]
 do
@@ -64,6 +65,10 @@ do
          export RUN="$2"
          shift # past argument
       ;;
+      -n|--ncyc)
+         export num_cycles="$2"
+         shift # past argument
+      ;;
       *)
          #any unspecified key is CONMON_SUFFIX
          export CONMON_SUFFIX=$key
@@ -80,7 +85,11 @@ echo "CONMON_SUFFIX = $CONMON_SUFFIX"
 echo "PDATE         = $PDATE"
 echo "RUN           = $RUN"
 
-export NUM_CYCLES=${NUM_CYCLES:-121}			# number of cycles in plot
+if [[ ${#num_cycles} -gt 0 ]]; then
+   export NUM_CYCLES=${num_cycles}
+fi
+
+
 export JOBNAME=${JOBNAME:-ConMon_plt_${CONMON_SUFFIX}}
 export grib2=${grib2:-1}				# 1 = grib2 (true), 0 = grib
 							# should this move to config?
diff --git a/src/Conventional_Monitor/parm/ConMon_config b/src/Conventional_Monitor/parm/ConMon_config
index 120d0a26..629dcc7e 100644
--- a/src/Conventional_Monitor/parm/ConMon_config
+++ b/src/Conventional_Monitor/parm/ConMon_config
@@ -177,6 +177,11 @@ if [[ $CONMON_CONFIG -ne 1 ]]; then
    export C_LOGDIR=${C_PTMP_USER}/logs/${CONMON_SUFFIX}/${RUN}/conmon
    export WORK_conmon=${WORK_conmon:-${C_STMP_USER}/${CONMON_SUFFIX}/${RUN}/ConMon}
 
+   #
+   #  NUM_CYCLES is the number of cycles to be used time series plots.
+   #
+   export NUM_CYCLES=${NUM_CYCLES:-121}
+   
    #
    #  Automatically remove old, extracted data files
    #
diff --git a/src/Ozone_Monitor/image_gen/ush/OznMon_Plt.sh b/src/Ozone_Monitor/image_gen/ush/OznMon_Plt.sh
index 84348adb..795ab095 100755
--- a/src/Ozone_Monitor/image_gen/ush/OznMon_Plt.sh
+++ b/src/Ozone_Monitor/image_gen/ush/OznMon_Plt.sh
@@ -5,44 +5,18 @@
 #
 #  Main plot script for OznMon.
 #
-#  Usage:
-#
-#    OznMon_Plt.sh OZNMON_SUFFIX [-p|pdate yyyymmddcc] [-r|run gdas|gfs]
-#
-#	OZNMON_SUFFIX = data source identifier which matches data 
-#		  	in the OZN_TANKDIR directory.
-#       -p|--pdate    = specified cycle to plot.  If not specified the
-#			last available date will be plotted.
-#	-r|--run      = $RUN value, gdas|gfs, default is gdas.
-#
-#       -t|--tank     = parent directory to the oznmon data file location.  This will be extended by 
-#                       $OZNMON_SUFFIX, $RUN, and $PDATE to locate the extracted oznmon data.
-#                       Three data directory formats will be tried:
-#                          ops = ${tankdir}/${net}/${version}/${run}.${pdy}/${hh}/atmos/${monitor}
-#                          dev = ${tankdir}/${monitor}/stats/${net}/${run}.${pdy}/${hh}
-#                          mon = ${tankdir}/stats/${net}/${run}.${pdy}/${hh}/${monitor}
-#                       
-#                       If --tank is not specified then it defaults to OZN_TANKDIR (defined in 
-#                       parm/OznMon_config).
-#
-#       -c1|--comp1   = define first instrument/sat source to plot as comparison
-#                        (applies to time series plots only)
-#       -c2|--comp2   = define second instrument/sat source to plot as comparison
-#                        (applies to time series plots only)
-#
-#	NOTE:  Both COMP1 and COMP2 have to be defined to 
-#	       generate comparison plots as part of the COMP1
-#	       source's time plots.
 #-----------------------------------------------------------------------
 
 function usage {
   echo " "
-  echo "Usage:  OznMon_Plt.sh OZNMON_SUFFIX "
+  echo "Usage:  OznMon_Plt.sh OZNMON_SUFFIX [-p|--pdate -r|--run -n|--ncyc -c1|--comp1 -c2|--comp2] "
   echo "            OZNMON_SUFFIX is data source identifier which matches data in "
   echo "              the $OZN_TANKDIR directory."
   echo "            -p | --pdate yyyymmddcc to specify the cycle to be plotted."
   echo "              If unspecified the last available date will be plotted."
   echo "            -r | --run  the gdas|gfs run to be plotted, gdas is default"
+  echo "            -n | --ncyc is the number of cycles to be used in time series plots.  If"
+  echo "              not specified the default value in parm/RadMon_user_settins will be used"
   echo "            -t | --tank parent directory to the oznmon data file location.  This" 
   echo "              will be extended by $OZNMON_SUFFIX, $RUN, and $PDATE to locate the"
   echo "              extracted oznmon data."
@@ -53,11 +27,12 @@ function usage {
 
 echo start OznMon_Plt.sh
 
-
 nargs=$#
 echo nargs = $nargs
 
+num_cycles=""
 tank=""
+pdate=""
 
 while [[ $# -ge 1 ]]
 do
@@ -72,6 +47,10 @@ do
          export RUN="$2"
          shift # past argument
       ;;
+      -n|--ncyc)
+         num_cycles="$2"
+         shift # past argument
+      ;;
       -t|--tank)
          tank="$2" 
          shift # past argument
@@ -93,7 +72,7 @@ do
    shift
 done
 
-if [[ $nargs -lt 0 || $nargs -gt 9 ]]; then
+if [[ $nargs -lt 0 || $nargs -gt 13 ]]; then
    usage
    exit 1
 fi
@@ -112,6 +91,10 @@ if [[ ${#RUN} -le 0 ]]; then
    export RUN=gdas 
 fi
 
+if [[ ${#num_cycles} -gt 0 ]]; then
+   export NUM_CYCLES=${num_cycles}
+fi
+
 echo "OZNMON_SUFFIX = $OZNMON_SUFFIX"
 echo "pdate         = $pdate"
 echo "RUN           = $RUN"
@@ -172,7 +155,6 @@ else
    fi
 fi
 export OZN_TANKDIR=${ozn_tankdir}
-echo "OZN_TANKDIR = $OZN_TANKDIR"
 
 #--------------------------------------------------------------------
 #  Set up OZN_TANKDIR_IMGS
@@ -218,7 +200,6 @@ if [[ ${#pdate} -le 0 ]]; then
    fi
 fi
 
-
 #------------------------------------
 #  Confirm there is data for $pdate
 #
diff --git a/src/Ozone_Monitor/image_gen/ush/plot_summary.sh b/src/Ozone_Monitor/image_gen/ush/plot_summary.sh
index 143302f2..879265ee 100755
--- a/src/Ozone_Monitor/image_gen/ush/plot_summary.sh
+++ b/src/Ozone_Monitor/image_gen/ush/plot_summary.sh
@@ -60,8 +60,9 @@ $UNCOMPRESS *.gz
 #  cycle will be the cycle specified by $PDATE.
 #
 if [[ -e ${SATYPE}.${ptype}.ctl ]]; then
-   bdate=`$NDATE -720 $PDATE`
-   ${OZN_IG_SCRIPTS}/update_ctl_tdef.sh ${SATYPE}.${ptype}.ctl ${bdate} 121 
+   ((cyc=${NUM_CYCLES}-1, hrs=cyc*${CYCLE_INTERVAL}))
+   bdate=`${NDATE} -${hrs} ${PDATE}`
+   ${OZN_IG_SCRIPTS}/update_ctl_tdef.sh ${SATYPE}.${ptype}.ctl ${bdate} ${NUM_CYCLES} 
 
 cat << EOF > ${SATYPE}.gs
 'open ${SATYPE}.${ptype}.ctl'
diff --git a/src/Ozone_Monitor/image_gen/ush/plot_time.sh b/src/Ozone_Monitor/image_gen/ush/plot_time.sh
index 42d02fdf..1a8ba8cd 100755
--- a/src/Ozone_Monitor/image_gen/ush/plot_time.sh
+++ b/src/Ozone_Monitor/image_gen/ush/plot_time.sh
@@ -84,11 +84,12 @@ done
 #  Modify tdef line in .ctl file to start at bdate.
 #
 if [[ -e ${SATYPE}.${dsrc}.ctl ]]; then
-   edate=`$NDATE -720 $PDATE`
-   ${OZN_IG_SCRIPTS}/update_ctl_tdef.sh ${SATYPE}.${dsrc}.ctl ${edate} 121
+   ((cyc=${NUM_CYCLES}-1, hrs=cyc*${CYCLE_INTERVAL}))
+   edate=`${NDATE} -${hrs} ${PDATE}`
+   ${OZN_IG_SCRIPTS}/update_ctl_tdef.sh ${SATYPE}.${dsrc}.ctl ${edate} ${NUM_CYCLES}
 
    if [[ $ADD_COMP -eq 1 ]]; then
-      ${OZN_IG_SCRIPTS}/update_ctl_tdef.sh ${COMP2}.${dsrc}.ctl ${edate} 121
+      ${OZN_IG_SCRIPTS}/update_ctl_tdef.sh ${COMP2}.${dsrc}.ctl ${edate} ${NUM_CYCLES}
    fi
 
 
diff --git a/src/Ozone_Monitor/parm/OznMon_user_settings b/src/Ozone_Monitor/parm/OznMon_user_settings
index 22f2de96..6ad8ff22 100644
--- a/src/Ozone_Monitor/parm/OznMon_user_settings
+++ b/src/Ozone_Monitor/parm/OznMon_user_settings
@@ -72,6 +72,10 @@ export REGIONAL_RR=${REGIONAL_RR:-0}
 #
 export CYCLE_INTERVAL=${CYCLE_INTERVAL:-6}
 
+#
+#  NUM_CYCLES is the number of cycles to be used time series plots.
+#
+export NUM_CYCLES=${NUM_CYCLES:-121}
 
 #
 #  CLEAN_TANKDIR controls automatic removal of old data files in
diff --git a/src/Radiance_Monitor/image_gen/ush/RadMon_IG_glb.sh b/src/Radiance_Monitor/image_gen/ush/RadMon_IG_glb.sh
index fe9b1331..bf53ac97 100755
--- a/src/Radiance_Monitor/image_gen/ush/RadMon_IG_glb.sh
+++ b/src/Radiance_Monitor/image_gen/ush/RadMon_IG_glb.sh
@@ -13,7 +13,7 @@
 #  usage
 #--------------------------------------------------------------------
 function usage {
-  echo "Usage:  RadMon_IG_glb.sh suffix [-p|--pdate -r|--run ]"
+  echo "Usage:  RadMon_IG_glb.sh suffix [-p|--pdate -r|--run -n|--ncyc]"
   echo ""
   echo "            suffix is the indentifier for this data source."
   echo "              This is usually the same as the NET value."
@@ -23,6 +23,9 @@ function usage {
   echo ""
   echo "            -r|--run is gdas|gfs.  gdas is the default if not specified."
   echo ""
+  echo "            -n|--ncyc is the number of cycles to be used in time series plots.  If"
+  echo "              not specified the default value in parm/RadMon_user_settins will be used"
+  echo ""
 }
 
 echo start RadMon_IG_glb.sh
@@ -34,7 +37,7 @@ echo
 exit_value=0
 
 nargs=$#
-if [[ $nargs -lt 1 || $nargs -gt 5 ]]; then
+if [[ $nargs -lt 1 || $nargs -gt 7 ]]; then
    usage
    exit 1
 fi
@@ -44,6 +47,7 @@ fi
 #
 run=gdas
 pdate=""
+num_cycles=""
 
 while [[ $# -ge 1 ]]
 do
@@ -58,6 +62,10 @@ do
          run="$2"
          shift # past argument
       ;;
+      -n|--ncyc)
+         num_cycles="$2"
+         shift # past argument
+      ;;
       *)
          #any unspecified key is RADMON_SUFFIX
          export RADMON_SUFFIX=$key
@@ -72,7 +80,11 @@ export RUN=${run}
 echo "RADMON_SUFFIX = ${RADMON_SUFFIX}"
 echo "RUN           = ${RUN}"
 echo "pdate         = ${pdate}"
+echo "num_cycles    = ${num_cycles}"
 
+if [[ ${#num_cycles} -gt 0 ]]; then
+   export NUM_CYCLES=${num_cycles}
+fi
 
 #--------------------------------------------------------------------
 # Run config files to load environment variables, 
diff --git a/src/Radiance_Monitor/image_gen/ush/RadMon_IG_rgn.sh b/src/Radiance_Monitor/image_gen/ush/RadMon_IG_rgn.sh
index 1fa3e272..b85baf2d 100755
--- a/src/Radiance_Monitor/image_gen/ush/RadMon_IG_rgn.sh
+++ b/src/Radiance_Monitor/image_gen/ush/RadMon_IG_rgn.sh
@@ -11,7 +11,7 @@
 #  usage
 #--------------------------------------------------------------------
 function usage {
-  echo "Usage:  RadMon_IG_rgn.sh suffix [-p|--pdate -r|--run ]"
+  echo "Usage:  RadMon_IG_rgn.sh suffix [-p|--pdate -r|--run -n|--ncyc]"
   echo ""
   echo "            suffix is the indentifier for this data source."
   echo "              This is usually the same as the NET value."
@@ -21,6 +21,9 @@ function usage {
   echo ""
   echo "            -r|--run  nam is the default if not specified."
   echo ""
+  echo "            -n|--ncyc is the number of cycles to be used in time series plots.  If"
+  echo "              not specified the default value in parm/RadMon_user_settins will be used"
+  echo ""
 }
 
 
@@ -28,7 +31,7 @@ echo start RadMon_IG_rgn.sh
 
 
 nargs=$#
-if [[ $nargs -lt 1 || $nargs -gt 5 ]]; then
+if [[ $nargs -lt 1 || $nargs -gt 7 ]]; then
    usage
    exit 1
 fi
@@ -37,6 +40,8 @@ fi
 #  Process command line arguments.
 #
 run=nam
+pdate=""
+num_cycles=""
 
 while [[ $# -ge 1 ]]
 do
@@ -51,6 +56,10 @@ do
          run="$2"
          shift # past argument
       ;;
+      -n|--ncyc)
+         num_cycles="$2"
+         shift # past argument
+      ;;
       *)
          #any unspecified key is RADMON_SUFFIX
          export RADMON_SUFFIX=$key
@@ -65,9 +74,11 @@ export RUN=${run}
 echo "RADMON_SUFFIX = ${RADMON_SUFFIX}"
 echo "RUN           = ${RUN}"
 echo "pdate         = ${pdate}"
+echo "num_cycles    = ${num_cycles}"
 
-
-set -ax
+if [[ ${#num_cycles} -gt 0 ]]; then
+   export NUM_CYCLES=${num_cycles}
+fi
 
 #--------------------------------------------------------------------
 # Set environment variables