NDBC THREDDS Server Catalog https://dods.ndbc.noaa.gov/thredds/catalog/data/cwind/41021/catalog.html

Dataset Size Last Modified
     Folder  41021   --
         41021c1996.nc 352.2 Kbytes 1996-11-16T22:50:00Z

National Data Buoy Center THREDDS Server at National Data Buoy Center see Info
THREDDS Data Server [Version 4.6.14 - 2019-07-23T11:04:31-0600] Documentation