RTOFS (Global) is a global ocean forecast system based on the HYbrid Coordinate Ocean Model (HYCOM).

The model is run once a day, completing at about 2230Z. Each run starts with a 2 day hindcast and produces ocean surface forecasts every hour and full volume forecasts every 6 hours from the 0000Z nowcast out to 144 hours.

RTOFS (Global) model data is available after 2230 UTC .

Nowcast/Forecast graphics are updated the next day.

RTOFS web home page: http://polar.ncep.noaa.gov/ofs/developmental/global/about