How can I get data certified for use in a court of law?

The National Data Buoy Center is not authorized to produce certified copies. The National Centers for Environmental Information, https://www.ncei.noaa.gov/certification, is the only place that you can obtain certified copies of U.S. weather information. Contact them at https://www.ncei.noaa.gov/, or by calling (828) 271-4800, to request certification.