+def convert_nrcs_units_to_metric(element_cd, value):
+ """convert NRCS values from English to metric"""
+ if element_cd == 'TOBS':
+ value = f_to_c(value)
+ elif element_cd == 'SNWD':
+ value = in_to_cm(value)
+ elif element_cd == 'PREC':
+ value = in_to_mm(value)
+ return value
+