Two helpful resources for safe maritime navigation include the NOAA NWS Ocean Prediction Center (OPC) Surface Analyses and Forecast Charts. OPC uses Surface Analyses to map historical observations and Forecast Charts to predict ocean storm and weather systems 120 hours in advance! U.S. ports experience nearly one million calls and departures every year. OPC’s Surface Analyses and Forecast Charts are there to help steer those ships through ‘hell and high water,’ to arrive and leave our shores saf