diff --git a/modules/icing/pirep_goes.py b/modules/icing/pirep_goes.py
index 2482bdf709d29f786fcec1cc87a16c2f74a196ec..730741ce5a1001077e8462a167b822e70d2f1935 100644
--- a/modules/icing/pirep_goes.py
+++ b/modules/icing/pirep_goes.py
@@ -1341,7 +1341,7 @@ def apply_qc_icing_pireps_exp1(icing_alt, cld_top_hgt, cld_geo_dz, cld_phase, cl
         keep = np.where(keep, (cld_top_hgt[i,] + closeness_top) > icing_alt[i], False)
 
         keep = np.where(keep, np.logical_and(cld_top_hgt[i,] > icing_alt[i,],
-                                  (cld_top_hgt[i,] - 1000.0) < icing_alt[i,]), False)
+                                  (cld_top_hgt[i,] - 1500.0) < icing_alt[i,]), False)
         keep = np.where(keep, np.logical_and(cld_top_temp[i,] > 228.0, cld_top_temp[i,] < 274.0), False)
 
         mask.append(keep)