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 The GFS superceded the AVN and MRF models, on which it is largely based.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.
15:26 EST Farmers are being warned climate change will intensify the challenge of feeding an increasing global population, with an expected 9 billion on the planet by 2050.