diff --git a/modules/util/viirs_surfrad.py b/modules/util/viirs_surfrad.py
index 13e253312dfa3a185f0c8086da4511b8676e28f3..38e11bb88dd287c4fb33f1aa14cc4a482a851d44 100644
--- a/modules/util/viirs_surfrad.py
+++ b/modules/util/viirs_surfrad.py
@@ -91,11 +91,12 @@ def process_cld_prob(grd_k):
 def process_cld_opd(grd_k):
     keep = np.invert(np.isnan(grd_k))
     num_keep = np.sum(keep)
-    keep_vthin = np.where(keep, grd_k < 0.01, False)
-    keep_vthik = np.where(keep, grd_k < 150.0, False)
-    frac_vthin = np.sum(keep_vthin) / num_keep
-    frac_vthik = np.sum(keep_vthik) / num_keep
-    if not (frac_vthin >= 0.10 and frac_vthik >= 0.10):
+    keep_thin = np.where(keep, np.logical_and(grd_k > 0.1, grd_k < 4.0), False)
+    keep_thik = np.where(keep, np.logical_and(grd_k > 20.0, grd_k < 158.00), False)
+    frac_thin = np.sum(keep_thin) / num_keep
+    frac_thik = np.sum(keep_thik) / num_keep
+    # if not (frac_thin >= 0.10 and frac_thik >= 0.10):
+    if not (frac_thin >= 0.20):
         return None
     grd_k = np.where(np.invert(keep), 0, grd_k)
     return grd_k