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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 The GFS superceded the AVN and MRF models, on which it is largely based.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.
08:13 EST It was a double doona night in Melbourne with temperatures plunging to as low as 2.3 degrees Celsius in the city.