Catalog http://nomads.ncdc.noaa.gov/thredds/gfs3.html

Dataset Size Last Modified
     Folder  GFS 003   --
         Folder  GFS 003 - One Degree, 4/Day, 0-180 Forecast Hours/   --
         Folder  GFS 003 Analysis-Only - One Degree, 4/Day, 0, 3, 6 Forecast Hours/   --
         Folder  Aggregations   --
             Folder  GFS 003 - Aggregations/   --
             Folder  GFS 003 Analysis-Only - Aggregations/   --

NOMADS THREDDS Data Server (TDS) at NOAA Operational Model Archive and Distribution System (NOMADS)
THREDDS Data Server [Version 4.2.9 - 20111108.1758] Documentation