Seasonal Forecasting System 4

• Seasonal forecast dissemination products
• Seasonal Forecasting System 4 dissemination requirements
• Seasonal forecast monthly means and monthly mean anomaly dissemination products
• GRIB section 1 definition for Seasonal Forecast System 4 data
• Transmission of Seasonal Forecasting System products

The description of the System 4 can be found on http://www.ecmwf.int/products/changes/system4/