alt Catalog http://mtarchive.geol.iastate.edu/thredds/catalog/mtarchive/1954/06/25/gempak/catalog.html

Dataset Size Last Modified
     Folder  gempak   --
         Folder  upperair/   --
         Folder  surface/   --

ISU MTArchive at ISU MTArchive see Info
THREDDS Data Server [Version 4.6.14 - 2019-07-23T11:04:31-0600] Documentation