National Centers for Environmental Information / National Operational Model Archive and Distribution System Catalog https://www.ncei.noaa.gov/thredds/catalog/model-narr-a-files/197909/19790903/catalog.html

Dataset Size Last Modified
     Folder  19790903   --
         narr-a_221_19790903_2100_000.grb 56.33 Mbytes 2012-08-04T06:34:17.027Z
         narr-a_221_19790903_1800_000.grb 56.36 Mbytes 2012-08-04T06:34:13.485Z
         narr-a_221_19790903_1500_000.grb 56.26 Mbytes 2012-08-04T06:34:17.597Z
         narr-a_221_19790903_1200_000.grb 56.19 Mbytes 2012-08-04T06:34:14.060Z
         narr-a_221_19790903_0900_000.grb 56.02 Mbytes 2012-08-04T06:34:15.454Z
         narr-a_221_19790903_0600_000.grb 56.02 Mbytes 2012-08-04T06:34:16.491Z
         narr-a_221_19790903_0300_000.grb 56.21 Mbytes 2012-08-04T06:34:14.828Z
         narr-a_221_19790903_0000_000.grb 56.28 Mbytes 2012-08-04T06:34:15.965Z

NCEI-NC THREDDS Server at NCEI see Info
Documentation