diff --git a/scm/src/scm_physical_constants.F90 b/scm/src/scm_physical_constants.F90
index 5e4c6eda7..020873a8a 100644
--- a/scm/src/scm_physical_constants.F90
+++ b/scm/src/scm_physical_constants.F90
@@ -22,8 +22,9 @@ module scm_physical_constants
   real(kind=dp),parameter:: con_cliq   =4.1855e+3
   real(kind=dp),parameter:: con_csol   =2.1060e+3
   real(kind=dp),parameter:: con_cvap   =1.8460e+3
-  real(kind=dp),parameter:: con_hvap   =2.5000e+6
-  real(kind=dp),parameter:: con_hfus   =3.3358e+5
+  real(kind=dp),parameter:: con_hvap   =2.5000e+6                    !< latent heat of vaporization of water at 0C
+  real(kind=dp),parameter:: con_hfus   =3.3358e+5                    !< latent heat of fusion of water at 0C
+  real(kind=dp),parameter:: con_xls    =2.85e+6                      !< latent heat of sublimation of water at 0C
   real(kind=dp),parameter:: con_psat   =6.1078e+2_dp                 !< pres at H2O 3pt (\f$Pa\f$)
   real(kind=dp),parameter:: con_t0c    =2.7315e+2
   real(kind=dp),parameter:: con_ttp    =2.7316e+2
diff --git a/scm/src/scm_physical_constants.meta b/scm/src/scm_physical_constants.meta
index b54eaf0cd..7a1b78aa4 100644
--- a/scm/src/scm_physical_constants.meta
+++ b/scm/src/scm_physical_constants.meta
@@ -111,6 +111,13 @@
   dimensions = ()
   type = real
   kind = kind_phys
+[con_xls]
+  standard_name = latent_heat_of_sublimation_of_water_at_0C
+  long_name = latent heat of sublimation of water at 0C
+  units = J kg-1
+  dimensions = ()
+  type = real
+  kind = kind_phys
 [con_pi]
   standard_name = pi
   long_name = ratio of a circle's circumference to its diameter
diff --git a/scm/src/suite_info.py b/scm/src/suite_info.py
index 63d35c97c..8a7f9d4bd 100755
--- a/scm/src/suite_info.py
+++ b/scm/src/suite_info.py
@@ -1,9 +1,9 @@
 #!/usr/bin/env python
 
 class suite(object):
-  
+
     DEFAULT_MAX_TIMESTEP = 1800.0
-  
+
     def __init__(self, name, tracers, namelist, timestep, max_timestep, supported):
         DEFAULT_MAX_TIMESTEP = 1800.0
         self._name = name                     #should remain unchanged after init
@@ -12,12 +12,12 @@ def __init__(self, name, tracers, namelist, timestep, max_timestep, supported):
         self.tracers = self._default_tracers   #can be modified after init
         self.namelist = self._default_namelist #can be modified after init
         self._supported = supported
-      
+
         if max_timestep > 0:
             self._max_timestep = max_timestep     #should remain unchanged after init
         else:
             self._max_timestep = DEFAULT_MAX_TIMESTEP
-        
+
         if timestep <= self._max_timestep and timestep > 0:
             self._default_timestep = timestep #should remain unchanged after init
             self.timestep = self._default_timestep #can be modified after init
@@ -26,7 +26,7 @@ def __init__(self, name, tracers, namelist, timestep, max_timestep, supported):
         else:
             message = 'The timestep for suite {0} cannot be set greater than the max_timestep of {1}'.format(self._name, self._max_timestep)
             raise Exception(message)
-      
+
         @property
         def timestep(self):
             """Get the timestep for the given suite."""
@@ -40,7 +40,7 @@ def timestep(self, value):
             else:
                 message = 'The timestep for suite {0} cannot be set greater than the max_timestep of {1}'.format(self._name, self._max_timestep)
                 raise Exception(message)
-      
+
 suite_list = []
 suite_list.append(suite('SCM_GFS_v16',           'tracers_GFS_v16.txt',                  'input_GFS_v16.nml',                 600.0, 1800.0, True ))
 suite_list.append(suite('SCM_GFS_v17_p8',        'tracers_GFS_v17_p8.txt',               'input_GFS_v17_p8.nml',              600.0, 600.0,  True ))
@@ -49,6 +49,7 @@ def timestep(self, value):
 suite_list.append(suite('SCM_WoFS_v0',           'tracers_WoFS_v0.txt',                  'input_WoFS_v0.nml',                 600.0, 600.0 , True ))
 suite_list.append(suite('SCM_HRRR',              'tracers_HRRR.txt',                     'input_HRRR.nml',                    600.0, 600.0 , True ))
 
+suite_list.append(suite('SCM_RAP_tietke',        'tracers_RAP.txt',                      'input_RAP_tietke.nml',              600.0, 600.0 , False ))
 suite_list.append(suite('SCM_GFS_v15p2',         'tracers_GFS_v15p2.txt',                'input_GFS_v15p2.nml',               600.0, 1800.0, False))
 suite_list.append(suite('SCM_GFS_v15p2_RRTMGP',  'tracers_GFS_v15p2.txt',                'input_GFS_v15p2_RRTMGP.nml',        600.0, 1800.0, False))
 suite_list.append(suite('SCM_GFS_v15p2_no_nsst', 'tracers_GFS_v15p2.txt',                'input_GFS_v15p2.nml',               600.0, 1800.0, False))
@@ -67,14 +68,13 @@ def timestep(self, value):
 suite_list.append(suite('SCM_csawmg',            'tracers_csawmg.txt',                   'input_csawmg.nml',                  600.0, 1800.0, False))
 
 def main():
-    
+
     #print supported suites separated by commas
     suite_string = ''
     for s in suite_list:
         if s._supported:
-            suite_string += s._name + ',' + s._name + '_ps' + ','  
+            suite_string += s._name + ',' + s._name + '_ps' + ','
     print(suite_string[:-1])
 
 if __name__ == '__main__':
-    main()  
- 
+    main()