Initial TDS Installation Catalog http://esrl.noaa.gov/gsd/thredds/catalog/retro/hrrr/conus/wrftwo/2017/12/21/catalog.html

Dataset Size Last Modified
     Folder  21   --
         20171221.zip 40.54 Mbytes 2018-01-18T19:44:12Z

GSD TDS at ESRL/GSD/ITS/DSG see Info
Documentation