summary: The Operational Modeling system of the Azores Region (OMAR) consists of a downscaling of the Mercator-Ocean PSY2V3 North Atlantic solution for the Azores region, where the FES2004 tide solution is added, and the surface forcing is performed using the atmospheric forecasts from the 18-6 km resolution MM5 model run at UA http://www.climaat.angra.uac.pt/). The model is run in full baroclinic mode with a horizontal resolution of 6 km and with 50 vertical levels with a resolution of down to 1 m near the surface. The Operational Modeling System of the Azores Region for the Central Group of the archipelago (OMAR-Central Group) consists of a downscaling of the OMAR solution where the surface forcing is performed using the atmospheric forecasts from the 6 km resolution MM5 model run at UA http://www.climaat.angra.uac.pt/). The model is run in full baroclinic mode with a horizontal resolution of 2 km and with 50 vertical levels with a resolution of down to 1 m near the surface.