National Centers for Environmental Information / National Operational Model Archive and Distribution System Catalog https://www.ncei.noaa.gov/thredds/data-in-development/data-in-development.html

Dataset Size Last Modified
     Folder  Land based station   --
         Folder  NIDIS: National Integrated Drought Information System   --
             Folder  NClimGrid/   --
     Folder  Other   --
         Folder  Climate area grid masks (nclimgrid)/   --

NCEI THREDDS Server at NCEI see Info
Documentation