Initial TDS Installation Catalog http://esrl.noaa.gov/gsd/thredds/catalog/retro/hrrr_ak/catalog.html

Dataset Size Last Modified
     Folder  hrrr_ak   --
         Folder  HRRRAKv4_febmar2019_retro1/   --
         Folder  HRRRAKv4_julaug2018_retro1/   --

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