diff --git a/physics/ugwpv1_gsldrag.meta b/physics/ugwpv1_gsldrag.meta
index 41c93eda3..ab54f458a 100644
--- a/physics/ugwpv1_gsldrag.meta
+++ b/physics/ugwpv1_gsldrag.meta
@@ -595,8 +595,8 @@
   kind = kind_phys
   intent = in
 [rain]
-  standard_name = lwe_thickness_of_precipitation_amount_on_dynamics_timestep
-  long_name = total rain at this time step
+  standard_name = nonnegative_lwe_thickness_of_precipitation_amount_on_dynamics_timestep
+  long_name = total precipitation amount in each time step
   units = m
   dimensions = (horizontal_loop_extent)
   type = real
diff --git a/physics/unified_ugwp.meta b/physics/unified_ugwp.meta
index d590f0179..fbdf3d00e 100644
--- a/physics/unified_ugwp.meta
+++ b/physics/unified_ugwp.meta
@@ -1014,8 +1014,8 @@
   kind = kind_phys
   intent = in
 [rain]
-  standard_name = lwe_thickness_of_precipitation_amount_on_dynamics_timestep
-  long_name = total rain at this time step
+  standard_name = nonnegative_lwe_thickness_of_precipitation_amount_on_dynamics_timestep
+  long_name = total precipitation amount in each time step
   units = m
   dimensions = (horizontal_loop_extent)
   type = real