Added NSF disclaimer to README

README.md

@@ -23,3 +23,13 @@ Citation
     Ladwig, W. (2017). wrf-python (Version x.x.x) [Software]. Boulder, Colorado: UCAR/NCAR. https://doi.org/10.5065/D6W094P1 
     
 Note: The version number x.x.x should be set to the version of wrf-python that you are using.
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+
+*The National Center for Atmospheric Research is sponsored by the National
+Science Foundation. Any opinions, findings and conclusions or recommendations
+expressed in this material do not necessarily reflect the views of the
+National Science Foundation.*
+
+