diff --git a/modules/util/viirs_surfrad.py b/modules/util/viirs_surfrad.py
index 5d9e7b4dfbc74da48fbc11f7c87a813ba53e8de6..8f237b8c9e3938bcd2375efa5c7e26333ec75247 100644
--- a/modules/util/viirs_surfrad.py
+++ b/modules/util/viirs_surfrad.py
@@ -43,7 +43,7 @@ def process_cld_prob_(grd_k):
         return None, True
     keep_clr = np.where(keep, grd_k < 0.20, False)
     frac_keep = np.sum(keep_clr)/num_keep
-    if not (0.40 < frac_keep < 0.60):
+    if not (0.38 < frac_keep < 0.62):
         return None, False
     grd_k = np.where(np.invert(keep), 0, grd_k)  # Convert NaNs to 0
     return grd_k, False