NDBC THREDDS Server Catalog https://dods.ndbc.noaa.gov/thredds/catalog/data/swden/alsn6/catalog.html

Dataset Size Last Modified
     Folder  alsn6   --
         alsn6w1996.nc 6.657 Mbytes 2006-01-19T20:28:24Z
         alsn6w1997.nc 6.676 Mbytes 2006-01-19T20:28:24Z
         alsn6w1998.nc 6.676 Mbytes 2006-01-19T20:28:24Z
         alsn6w1999.nc 6.693 Mbytes 2006-01-19T20:28:24Z
         alsn6w2000.nc 6.365 Mbytes 2006-01-19T20:28:24Z

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