Discussion:Global Forecast System

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The GFS model is a spectral model with an approximate horizontal resolution of 13 km for the first 10 days and 27 km from 240 to 384 hours (16 days). In the vertical, the model is divided into 64 layers and temporally, it produces forecast output every hour for the first 12 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.