This function downloads NAM12
meteorology data files from the NOAA FTP server and
saves them to a specified folder. Files can be
downloaded either by specifying a list of filenames
(in the form of 'RP[YYYY][MM].gbl'
) or
through bulk download of a year of files.
get_met_nam12(files = NULL, years = NULL, months = NULL, path_met_files)
a vector list of exact filenames for the NAM12 files.
a vector list of years for which NAM12 files are to be obtained via FTP.
a vector list of months for which NAM12 files are to be obtained via FTP.
a full path should be provided for the location of the meteorological data files; downloaded files will be saved in this location.