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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 The GFS superceded the AVN and MRF models, on which it is largely based.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.
15:40 EDT Western New South Wales has begun a heat wave and it is likely to become record-breaking in the far west where maximum temperatures should average as much as 40 degrees over seven days.