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Australia GFS Surface Temperature/Wind +168 hour Chart
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 The GFS superceded the AVN and MRF models, on which it is largely based.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.
If you thought Melbourne's winter was colder than usual, you are not wrong.