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 The GFS superceded the AVN and MRF models, on which it is largely based.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.
10:25 EDT Slow moving storms have brought heavy rain, hail and thousands of lightning strikes to south eastern New South Wales and the Australian Capital Territory.