alt Catalog http://mtarchive.geol.iastate.edu/thredds/catalog/mtarchive/2003/08/21/gempak/surface/snet/catalog.html

Dataset Size Last Modified
     Folder  snet   --
         20030821_snet.gem 2.240 Mbytes 2003-08-21T23:46:27Z

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