NDBC THREDDS Server Catalog https://dods.ndbc.noaa.gov/thredds/hfradar.html

Dataset Size Last Modified
     US East Coast and Gulf of Mexico 1km resolution HF Radar Hourly RTV data   --
     US East Coast and Gulf of Mexico 2km resolution HF Radar Hourly RTV data   --
     US East Coast and Gulf of Mexico 6km resolution HF Radar Hourly RTV data   --
     US West Coast 500m resolution HF Radar Hourly RTV data   --
     US West Coast 1km resolution HF Radar Hourly RTV data   --
     US West Coast 2km resolution HF Radar Hourly RTV data   --
     US West Coast 6km resolution HF Radar Hourly RTV data   --
     Great Lakes North America 500m resolution HF Radar Hourly RTV data   --
     Great Lakes North America 1km resolution HF Radar Hourly RTV data   --
     Great Lakes North America 2km resolution HF Radar Hourly RTV data   --
     Great Lakes North America 6km resolution HF Radar Hourly RTV data   --
     US Hawaii 1km resolution HF Radar Hourly RTV data   --
     US Hawaii 2km resolution HF Radar Hourly RTV data   --
     US Hawaii 6km resolution HF Radar Hourly RTV data   --
     Alaska North Slope 1km resolution HF Radar Hourly RTV data   --
     Alaska North Slope 2km resolution HF Radar Hourly RTV data   --
     Alaska North Slope 6km resolution HF Radar Hourly RTV data   --
     Puerto Rico/Virgin Islands 2km resolution HF Radar Hourly RTV data   --
     Puerto Rico/Virgin Islands 6km resolution HF Radar Hourly RTV data   --
     Folder  NDBC HF Radar Data - Individual Hourly RTV Files/   --

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