Initial TDS Installation Catalog http://esrl.noaa.gov/gsd/thredds/catalog/retro/hrrr/conus/wrftwo/2017/12/20/catalog.html

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     Folder  20   --
         20171220.zip 41.33 Mbytes 2018-01-18T19:44:09Z

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