National Centers for Environmental Information / National Operational Model Archive and Distribution System Catalog https://www.ncei.noaa.gov/thredds/catalog/model-narr-a-files/200312/20031203/catalog.html

Dataset Size Last Modified
     Folder  20031203   --
         narr-a_221_20031203_2100_000.grb 57.30 Mbytes 2012-08-03T18:14:13.233Z
         narr-a_221_20031203_1800_000.grb 57.51 Mbytes 2012-08-03T18:14:13.703Z
         narr-a_221_20031203_1500_000.grb 57.16 Mbytes 2012-08-03T18:14:14.368Z
         narr-a_221_20031203_1200_000.grb 57.06 Mbytes 2012-08-03T18:14:15.522Z
         narr-a_221_20031203_0900_000.grb 56.79 Mbytes 2012-08-03T18:14:12.541Z
         narr-a_221_20031203_0600_000.grb 56.47 Mbytes 2012-08-03T18:14:11.993Z
         narr-a_221_20031203_0300_000.grb 56.70 Mbytes 2012-08-03T18:14:11.574Z
         narr-a_221_20031203_0000_000.grb 56.64 Mbytes 2012-08-03T18:14:14.900Z

NCEI-NC THREDDS Server at NCEI see Info
Documentation