What archived data can I use prior to the start of the FNL dataset?

Our “reanalysis” dataset goes back to 1948. You can ftp that data just as for the FNL. You can also choose the reanalysis data from the list of meterorology datasets through the READY web site at https://www.ready.noaa.gov/HYSPLIT.php and click the link for “Run HYSPLIT with archived data.”

Barbara Stunder