HYSPLIT Forum: hysplitbbs.arl.noaa.gov

I am encountering an error if I try to run online HYSPLIT for archived dispersion using 12km NAM data. For example, I wanted to do a dispersion run beginning at 03Z on 02 NOV 2014. I selected 20141102NAM12 data. On the Model Run Details page, the year/month/day options are inactive, presumably becau...

Thanks for the reply. OK, so I need to use two met files to do a dispersion run that begins in the past and continues into the future. Is there a way to do that using the web version of HYSPLIT? I don't know of a way to specify more than one met file with the web version.

I am not clear on the purpose of the "Appended" met data files on the ARL server. If I understand things correctly, I would not need to use anything other than the regular model output files in order to ensure that I am taking advantage of the best data. For example - say it is 10AM EDT and I want t...