NDBC THREDDS Server Catalog https://dods.ndbc.noaa.gov/thredds/catalog/data/stdmet/jcrn4/catalog.html

Dataset Size Last Modified
     Folder  jcrn4   --
         jcrn4h9999.nc 16.99 Mbytes 2021-09-16T07:30:00Z

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