Global Forecast System. The operational numerical weather forecasting model run by NCEP. The GFS superceded the AVN and MRF models, on which it is largely based. Forecast data from the GFS is available out to 180 hours at full resolution and 16 days at a reduced resolution.
11:22 EDT A Victorian Mallee farmer says the weather bureau has made too many mistakes for grain growers to trust its long term forecasts.