National Centers for Environmental Information / National Operational Model Archive and Distribution System Catalog https://www.ncei.noaa.gov/thredds/catalog/model-narr-a-files/199411/19941121/catalog.html

Dataset Size Last Modified
     Folder  19941121   --
         narr-a_221_19941121_2100_000.grb 56.33 Mbytes 2012-08-03T22:44:49Z
         narr-a_221_19941121_1800_000.grb 56.75 Mbytes 2012-08-03T22:44:52.985Z
         narr-a_221_19941121_1500_000.grb 56.74 Mbytes 2012-08-03T22:44:52.021Z
         narr-a_221_19941121_1200_000.grb 56.98 Mbytes 2012-08-03T22:44:49.547Z
         narr-a_221_19941121_0900_000.grb 56.45 Mbytes 2012-08-03T22:44:52.463Z
         narr-a_221_19941121_0600_000.grb 56.34 Mbytes 2012-08-03T22:44:50.162Z
         narr-a_221_19941121_0300_000.grb 56.54 Mbytes 2012-08-03T22:44:51.536Z
         narr-a_221_19941121_0000_000.grb 56.80 Mbytes 2012-08-03T22:44:50.753Z

NCEI-NC THREDDS Server at NCEI see Info
Documentation