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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 The GFS superceded the AVN and MRF models, on which it is largely based.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.
11:37 EST Tens of thousands of people are without power and SES crews have answered more than 3,000 emergency calls as heavy rain and "cyclonic" winds topping 130kph continue to lash Sydney, the Hunter and the NSW Central Coast.