diff --git a/modules/icing/pirep_goes.py b/modules/icing/pirep_goes.py
index e74b0d284f6f76ac717e1dd21f80a40ab170eafc..30aa4b1e2a02fcc1c2d380e2f87e4ff5b9661562 100644
--- a/modules/icing/pirep_goes.py
+++ b/modules/icing/pirep_goes.py
@@ -891,10 +891,10 @@ def analyze2(filename, filename_l1b):
     num_obs = iint.size
     print('num obs: ', num_obs)
 
-    no_ice = iint == -1
-    ice = iint >= 1
-    tr_ice = (iint == 1) | (iint == 2)
-    tr_plus_ice = iint > 2
+    no_ice = iint == -1  # All no icing
+    ice = iint >= 1  # All icing
+    tr_ice = (iint == 1) | (iint == 2)  # True for icing cats 1 and 2
+    tr_plus_ice = iint > 2  # True for icing cats 3 and above
 
     print('num no ice: ', np.sum(no_ice))
     print('num ice:    ', np.sum(ice))