diff --git a/met/src/libcode/vx_nc_util/nc_utils.cc b/met/src/libcode/vx_nc_util/nc_utils.cc
index eea6bb495c..a0c302b96c 100644
--- a/met/src/libcode/vx_nc_util/nc_utils.cc
+++ b/met/src/libcode/vx_nc_util/nc_utils.cc
@@ -1404,7 +1404,7 @@ void _apply_scale_factor(float *data, const T *packed_data,
       else {
          if (raw_min_val > packed_data[idx]) raw_min_val = packed_data[idx];
          if (raw_max_val < packed_data[idx]) raw_max_val = packed_data[idx];
-         data[idx] = (packed_data[idx] * scale_factor) + add_offset;
+         data[idx] = ((float)packed_data[idx] * scale_factor) + add_offset;
          if (data[idx] > 0) positive_cnt++;
          if (min_value > data[idx]) min_value = data[idx];
          if (max_value < data[idx]) max_value = data[idx];
@@ -1667,7 +1667,7 @@ template <typename T>
 int _apply_scale_factor(double *data, const T *packed_data,
                         const int cell_count, const T fill_value,
                         T &raw_min_val, T &raw_max_val, const char *data_type,
-                        float add_offset, float scale_factor) {
+                        double add_offset, double scale_factor) {
    int positive_cnt = 0;
    int unpacked_count = 0;
    double min_value =  10e10;
@@ -1680,7 +1680,7 @@ int _apply_scale_factor(double *data, const T *packed_data,
       else {
          if (raw_min_val > packed_data[idx]) raw_min_val = packed_data[idx];
          if (raw_max_val < packed_data[idx]) raw_max_val = packed_data[idx];
-         data[idx] = (packed_data[idx] * scale_factor) + add_offset;
+         data[idx] = ((double)packed_data[idx] * scale_factor) + add_offset;
          if (data[idx] > 0) positive_cnt++;
          if (min_value > data[idx]) min_value = data[idx];
          if (max_value < data[idx]) max_value = data[idx];
diff --git a/test/xml/unit_plot_data_plane.xml b/test/xml/unit_plot_data_plane.xml
index 5a606bcea4..d3e99b8ede 100644
--- a/test/xml/unit_plot_data_plane.xml
+++ b/test/xml/unit_plot_data_plane.xml
@@ -257,6 +257,20 @@
     </output>
   </test>
 
+  <test name="plot_data_plane_NCCF_time">
+    <exec>&MET_BIN;/plot_data_plane</exec>
+    <param> \
+      &DATA_DIR_MODEL;/nccf/GloTEC_TEC_2015_03_17.nc \
+      &OUTPUT_DIR;/plot_data_plane/plot_data_plane_NCCF_time.ps \
+      'name="TEC"; level="(20150317_000500,*,*)"; file_type=NETCDF_NCCF;' \
+      -title "NCCF GloTEC - Total Electron Content" \
+      -v 1
+    </param>
+    <output>
+      <ps>&OUTPUT_DIR;/plot_data_plane/plot_data_plane_NCCF_time.ps</ps>
+    </output>
+  </test>
+
   <test name="plot_data_plane_GRIB2_PROB">
     <exec>&MET_BIN;/plot_data_plane</exec>
     <param> \