https://www.weather.gov/media/notification/scn20-43nos_ofs.pdf
1. Retention period change - Only the most recent 31 days of OFS output files will be available on CO-OPS THREDDS.
2. File structure changes - To improve THREDDS performance related to file access and data aggregation
All model nowcast and forecast information is based on a hydrodynamic model and should be considered as computer-generated nowcast and forecast guidance.