diff --git a/lib/xmet/sounding.py b/lib/xmet/sounding.py
index c9562ed..8d4a078 100644
--- a/lib/xmet/sounding.py
+++ b/lib/xmet/sounding.py
@@ -263,7 +263,10 @@ class SoundingParams():
                                           SeriesIntersection.LESSER,
                                           lcl[1]-1)
 
-        moist_adiabat = follow_moist_adiabat(*lfc)
+        tv = virtual_temp_line.nearest(lcl[1])
+
+        moist_adiabat = follow_moist_adiabat((lcl[0] + tv) / 2,
+                                             lcl[1])
 
         el  = temp_line.intersect(moist_adiabat,
                                   SeriesIntersection.GREATER,