diff --git a/modules/icing/pirep_goes.py b/modules/icing/pirep_goes.py
index 0e5ada54aa054b42db5531caddb2db95a8ec052a..9034bf9a85c8bf60fba5de80ba6129f45a4a8521 100644
--- a/modules/icing/pirep_goes.py
+++ b/modules/icing/pirep_goes.py
@@ -1142,8 +1142,8 @@ def run_mean_std():
     ice_h5f_lst = [h5py.File(f, 'r') for f in ice_flist]
     no_ice_h5f_lst = [h5py.File(f, 'r') for f in no_ice_flist]
 
-    data = []
     for dname in ds_list:
+        data = []
         for idx, ice_h5f in enumerate(ice_h5f_lst):
             no_ice_h5f = no_ice_h5f_lst[idx]
             data.append(ice_h5f[dname][:,].flatten())