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 The GFS superceded the AVN and MRF models, on which it is largely based.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.
15:23 EST The weather pattern has altered abruptly, as it often does at this time of year, with a high pressure ridge taking over from low pressure, allowing almost all of New South Wales to dry out.