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 The GFS superceded the AVN and MRF models, on which it is largely based.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.
18:11 EDT A messy southerly buster thrashed Sydney today, bringing gusty winds and lighting up the skies with over 10 000 lighting strikes detected within 40km of the city.