Operational Links:

GFS Version 15: Initial Implementation of Unified Forecast System (UFS) with FV3 dynamic core NCEP Production Suite:

GFS v16 Dashboard (under construction)


The Global Forecast System (GFS) is a global numerical weather prediction system containing a global computer model and variational analysis run by the U.S. National Weather Service (NWS).

The GFS is run four times a day, and produces forecasts for up to 16 days in advance, with decreased spatial resolution after 10 days. The forecast component uses a spectral model with a resolution of T1534 from 0 to 240 hours (0-10 days) and T574 from 240 to 384 hours (10-16 days). In the vertical, the model is divided into 64 layers and temporally, it produces forecast output every hour for the first 120 hours, every 3 hours for days 5-10, and every 12 hours for days 10-16.

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