 In the vertical, the model is divided into 64 layers and temporally, it produces forecast output every hour for the first 120 hours, three hourly through day 10 and 12 hourly through day 16.The output from the GFS is also used to produce model output statistics.In addition to the main model, the GFS is also the basis of a lower-resolution 20-member (22, counting the control and operational members) ensemble that runs concurrently with the operational GFS and is available on the same time scales.