diff --git a/modules/icing/pireps.py b/modules/icing/pireps.py
index 2bf5dd8fad31013896d656a240fee853ab73a333..47cfd1373d269d8c79f8b51cee21110e89bcfd3b 100644
--- a/modules/icing/pireps.py
+++ b/modules/icing/pireps.py
@@ -6,6 +6,7 @@ NO_ICE = '\s*NEG\s*|\s*NONE\s*|\s*NEGATIVE\s*|\s*NO\s*'
 ICE_LVL = '\d+-\d+|FL\d+-FL\d+'
 
 # ICE Intensity: 0:No intensity report, 1:Trace, 2:Light, 3:Light Moderate, 4:Moderate, 5:Moderate Severe, 6:Severe
+# NO/NEG -1
 ICE_TRACE = '\s*TRACE\s*|\s*TRC\s*|\s*TR\s*'
 ICE_LGT = '\s*LGT\s*|\s*LIGHT\s*|\s*LT\s*|\s*LGHT\s*|\s*LIT\s*|\s*LITE\s*|\s*LG\s*'
 ICE_MOD = '\s*MOD\s*|\s*MDT\s*|\s*MODERATE\s*|\s*HEAVY\s*'
@@ -76,7 +77,7 @@ def pirep_icing(filename, lon_range=[-180, 180], lat_range=[-55, 55]):
 
                 if len(re.findall(NO_ICE, ice_str)) != 0:
                     rpts = neg_ice_dict.get(timestmp)
-                    tup = (lat, lon, fl, 0, ice_str)
+                    tup = (lat, lon, fl, -1, ice_str)
                     if rpts is None:
                         rpts = []
                         rpts.append(tup)
@@ -135,7 +136,7 @@ def pirep_icing(filename, lon_range=[-180, 180], lat_range=[-55, 55]):
                         rpts.append(tup)
 
             rpts = no_ice_dict.get(timestmp)
-            tup = (lat, lon, fl, 0, 'no observed icing')
+            tup = (lat, lon, fl, -1, 'no observed icing')
             if rpts is None:
                 rpts = []
                 rpts.append(tup)