GFS:

The Global Forecast System (GFS) - The GFS is a global spectral model used primarily for aviation weather forecasts. The GFS provides guidance out to 384 hours at 00, 06, 12 and 18UTC. Data provided with thanks to College of DuPage

The Global Forecast System (GFS) - The GFS is a global spectral model used primarily for aviation weather forecasts. The GFS provides guidance out to 384 hours at 00, 06, 12 and 18UTC. Data provided with thanks to College of DuPage