diff --git a/modules/util/gfs_reader.py b/modules/util/gfs_reader.py
index a3b7b822e2d0c9dff2bade261d83bb629457fbf8..9d33580fa567710fbf09b1211fd311d342611b9d 100644
--- a/modules/util/gfs_reader.py
+++ b/modules/util/gfs_reader.py
@@ -4,17 +4,18 @@ import glob
 import numpy as np
 import xarray as xr
 from util.util import value_to_index
-#import cartopy
-#from cartopy import *
 from metpy import *
-#import cartopy.crs as ccrs
-import random
+# import cartopy
+# from cartopy import *
+# import cartopy.crs as ccrs
 
-#gfs_directory = '/apollo/cloud/Ancil_Data/clavrx_ancil_data/dynamic/gfs/'
+# gfs_directory = '/apollo/cloud/Ancil_Data/clavrx_ancil_data/dynamic/gfs/'
 gfs_directory = '/Users/tomrink/data/gfs/'
 gfs_date_format = '%y%m%d'
 
+# force incoming longitude to (0, 360) to match GFS
 lon360 = True
+# GFS half degree resolution
 lat_coords = np.linspace(-90, 90, 361)
 lon_coords = np.linspace(0, 359.5, 720)