outRootGrp = Dataset(outNetCDF_File, 'w', format='NETCDF3_CLASSIC')

    if (inRootGrp.start_year != startDate.year):
        raise Exception("Specified simulation start year ({0}) does not match with input vapor pressure data file data year.".format(startDate.year))
        exit()

     # DEBUG: print global attributes of the original file:
##    for gAttribute in inRootGrp.ncattrs():
##        print 'Global attribute name:', gAttribute, '=', getattr(inRootGrp,gAttribute)


    # add global file level attributes to the new netcdf file
    outRootGrp.start_year = inRootGrp.start_year
    outRootGrp.data_variable_name = inRootGrp.data_variable_name
    outRootGrp.data_time_step = inTimeStep
    outRootGrp.orginal_data_source = 'Daymet Software Version 2.0'
    outRootGrp.conventions = 'CF-1.0'
    outRootGrp.modified_data_source = 'CI Water System'
    outRootGrp.spatial_reference = 'NAD83_UTM_Zone_12N'
    outRootGrp.datum = 'D_North_America_1983'

    # get dimension values from the original netcdf file
    inputTimeVar = inRootGrp.variables['time']
    inputXvar = inRootGrp.variables['x']
    inputYvar = inRootGrp.variables['y']
    inputVpVar = inRootGrp.variables[inRootGrp.data_variable_name]

    print(inputTimeVar.shape[0])
    print(inputXvar.shape[0])
    print(inputYvar.shape[0])
    print(inputVpVar.shape)
    # open the netCDF file in readonly mode based on which we will be creating a new netcdf file
    inRootGrp = Dataset(inPrecpNetCDF_File, "r", format="NETCDF3_CLASSIC")

    # open a new blank netcdf file to which we will be writting data
    outRootGrp = Dataset(outWindNetCDF_File, "w", format="NETCDF3_CLASSIC")

    # DEBUG: print global attributes of the original file:
    ##    for gAttribute in inRootGrp.ncattrs():
    ##        print 'Global attribute name:', gAttribute, '=', getattr(inRootGrp,gAttribute)

    # add global file level attributes to the new netcdf file
    outRootGrp.start_year = inRootGrp.start_year
    outRootGrp.data_variable_name = "V"
    outRootGrp.data_time_step = inRootGrp.data_time_step
    outRootGrp.orginal_data_source = "CI Water Generated Data Source"
    outRootGrp.conventions = "CF-1.0"
    outRootGrp.modified_data_source = "CI Water System"
    outRootGrp.spatial_reference = "NAD83_UTM_Zone_12N"
    outRootGrp.datum = "D_North_America_1983"

    # get dimension values from the original netcdf file
    inputTimeVar = inRootGrp.variables["time"]
    inputXvar = inRootGrp.variables["x"]
    inputYvar = inRootGrp.variables["y"]
    inputPrecVar = inRootGrp.variables["Prec"]

    # DEBUG: print dimensions of variables in input netcdf file
    print(inputTimeVar.shape[0])
    print(inputXvar.shape[0])
    print(inputYvar.shape[0])