National Centers for Environmental Information / National Operational Model Archive and Distribution System Catalog https://www.ncei.noaa.gov/thredds/catalog/model-narr-a-files/199512/19951212/catalog.html

Dataset Size Last Modified
     Folder  19951212   --
         narr-a_221_19951212_2100_000.grb 57.02 Mbytes 2012-08-04T08:41:53.304Z
         narr-a_221_19951212_1800_000.grb 57.15 Mbytes 2012-08-04T08:41:54.455Z
         narr-a_221_19951212_1500_000.grb 56.99 Mbytes 2012-08-04T08:41:54.996Z
         narr-a_221_19951212_1200_000.grb 56.69 Mbytes 2012-08-04T08:41:56.485Z
         narr-a_221_19951212_0900_000.grb 56.62 Mbytes 2012-08-04T08:41:56.908Z
         narr-a_221_19951212_0600_000.grb 56.57 Mbytes 2012-08-04T08:41:55.931Z
         narr-a_221_19951212_0300_000.grb 56.62 Mbytes 2012-08-04T08:41:55.454Z
         narr-a_221_19951212_0000_000.grb 57.22 Mbytes 2012-08-04T08:41:53.807Z

NCEI-NC THREDDS Server at NCEI see Info
Documentation