diff --git a/docs/Users_Guide/glossary.rst b/docs/Users_Guide/glossary.rst
index 3c71c5b9aa..2ec8305eaf 100644
--- a/docs/Users_Guide/glossary.rst
+++ b/docs/Users_Guide/glossary.rst
@@ -8760,6 +8760,11 @@ METplus Configuration Glossary
 
      | *Used by:*  EnsembleStat
 
+   ENSEMBLE_STAT_GRID_WEIGHT_FLAG
+     Specify the value for 'grid_weight_flag' in the MET configuration file for EnsembleStat.
+
+     | *Used by:* EnsembleStat
+
    FCST_PCP_COMBINE_USE_ZERO_ACCUM
      Only used if running PCPCombine wrapper with
      :term:`FCST_PCP_COMBINE_METHOD` = SUBTRACT. If True, build a -subtract
diff --git a/docs/Users_Guide/wrappers.rst b/docs/Users_Guide/wrappers.rst
index 68c73be4d6..0abd7debb0 100644
--- a/docs/Users_Guide/wrappers.rst
+++ b/docs/Users_Guide/wrappers.rst
@@ -281,6 +281,7 @@ METplus Configuration
 | :term:`ENSEMBLE_STAT_MET_CONFIG_OVERRIDES`
 | :term:`ENSEMBLE_STAT_ENS_MEMBER_IDS`
 | :term:`ENSEMBLE_STAT_CONTROL_ID`
+| :term:`ENSEMBLE_STAT_GRID_WEIGHT_FLAG`
 | :term:`ENSEMBLE_STAT_VERIFICATION_MASK_TEMPLATE` (optional)
 | :term:`ENS_VAR<n>_NAME` (optional)
 | :term:`ENS_VAR<n>_LEVELS` (optional)
@@ -890,6 +891,18 @@ see :ref:`How METplus controls MET config file settings<metplus-control-met>`.
    * - :term:`ENSEMBLE_STAT_MET_CONFIG_OVERRIDES`
      - n/a
 
+**${METPLUS_GRID_WEIGHT_FLAG}**
+
+.. list-table::
+   :widths: 5 5
+   :header-rows: 0
+
+   * - METplus Config(s)
+     - MET Config File
+   * - :term:`ENSEMBLE_STAT_GRID_WEIGHT_FLAG`
+     - grid_weight_flag
+
+
 .. _example_wrapper:
 
 Example
diff --git a/internal_tests/pytests/ensemble_stat/test_ensemble_stat_wrapper.py b/internal_tests/pytests/ensemble_stat/test_ensemble_stat_wrapper.py
index 1ef41cf8e8..4a12ceef65 100644
--- a/internal_tests/pytests/ensemble_stat/test_ensemble_stat_wrapper.py
+++ b/internal_tests/pytests/ensemble_stat/test_ensemble_stat_wrapper.py
@@ -553,6 +553,9 @@ def test_handle_climo_file_variables(metplus_config, config_overrides,
         ({'ENSEMBLE_STAT_CONTROL_ID': '0', },
          {'METPLUS_CONTROL_ID': 'control_id = "0";'}),
 
+        ({'ENSEMBLE_STAT_GRID_WEIGHT_FLAG': 'COS_LAT', },
+         {'METPLUS_GRID_WEIGHT_FLAG': 'grid_weight_flag = COS_LAT;'}),
+
     ]
 )
 def test_ensemble_stat_single_field(metplus_config, config_overrides,
diff --git a/metplus/wrappers/ensemble_stat_wrapper.py b/metplus/wrappers/ensemble_stat_wrapper.py
index 0d8e0141af..b3762465b6 100755
--- a/metplus/wrappers/ensemble_stat_wrapper.py
+++ b/metplus/wrappers/ensemble_stat_wrapper.py
@@ -66,6 +66,7 @@ class EnsembleStatWrapper(CompareGriddedWrapper):
         'METPLUS_OBS_QUALITY_EXC',
         'METPLUS_ENS_MEMBER_IDS',
         'METPLUS_CONTROL_ID',
+        'METPLUS_GRID_WEIGHT_FLAG',
     ]
 
     # handle deprecated env vars used pre v4.0.0
@@ -330,6 +331,11 @@ def create_c_dict(self):
         self.add_met_config(name='control_id',
                             data_type='string')
 
+        self.add_met_config(name='grid_weight_flag',
+                            data_type='string',
+                            extra_args={'remove_quotes': True,
+                                        'uppercase': True})
+
         # old method of setting MET config values
         c_dict['ENS_THRESH'] = (
             self.config.getstr('config', 'ENSEMBLE_STAT_ENS_THRESH', '1.0')
diff --git a/parm/met_config/EnsembleStatConfig_wrapped b/parm/met_config/EnsembleStatConfig_wrapped
index e398ca1d1d..1ed2dd7b21 100644
--- a/parm/met_config/EnsembleStatConfig_wrapped
+++ b/parm/met_config/EnsembleStatConfig_wrapped
@@ -223,7 +223,9 @@ rng = {
 
 ////////////////////////////////////////////////////////////////////////////////
 
-grid_weight_flag = NONE;
+//grid_weight_flag =
+${METPLUS_GRID_WEIGHT_FLAG}
+
 ${METPLUS_OUTPUT_PREFIX}
 //version          = "V9.0";
 
diff --git a/parm/use_cases/met_tool_wrapper/EnsembleStat/EnsembleStat.conf b/parm/use_cases/met_tool_wrapper/EnsembleStat/EnsembleStat.conf
index c7714c0291..6485f36212 100644
--- a/parm/use_cases/met_tool_wrapper/EnsembleStat/EnsembleStat.conf
+++ b/parm/use_cases/met_tool_wrapper/EnsembleStat/EnsembleStat.conf
@@ -212,3 +212,5 @@ ENSEMBLE_STAT_ENSEMBLE_FLAG_WEIGHT = FALSE
 
 #ENSEMBLE_STAT_ENS_MEMBER_IDS =
 #ENSEMBLE_STAT_CONTROL_ID =
+
+#ENSEMBLE_STAT_GRID_WEIGHT_FLAG =