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GRIB Model

GFS - Global Forecast System

Provider:National Centers for Environmental Prediction, NOAA (USA)
Model scope:Global
Update frequency:every 6 hours
Resolution:0.25°, 15.0nm, 27.8km
Model duration:61 forecasts starting at 0 hr, ending at 16 days
Parameters:pressure, wind, wind gust, rain, cloud, temperature, humidity, dew point, convection, wind wave, swell, swell/wave combined, ice, vorticity, vertical velocity, simulated radar, precipitable water, visibility, 0C isotherm, 250 mb, 500 mb, 850 mb
GRIB model date:Mon Dec 6 00:00:00 2021 UTC
Download date:Mon Dec 6 05:49:40 2021 UTC
Download delay:5hr 49min

Note: the Download delay is the amount of time required for the GRIB model to compute its forecast and then for the LuckGrib cluster to download the data and make it available. The LuckGrib delay is generally less than 10 minutes, the remainder of the delay is the model compute time.


GFS is the most commonly used weather forecast model and is a good choice for those who are new to using GRIB forecast data. GFS has global coverage and the LuckGrib server provides access to up to 16 days of forecast data.

The following description has been taken directly from the official documentation

The Global Forecast System (GFS) is a weather forecast model produced by the National Centers for Environmental Prediction (NCEP). Dozens of atmospheric and land-soil variables are available through this dataset, from temperatures, winds, and precipitation to soil moisture and atmospheric ozone concentration. The entire globe is covered by the GFS…

The GFS model is a coupled model, composed of four separate models (an atmosphere model, an ocean model, a land/soil model, and a sea ice model), which work together to provide an accurate picture of weather conditions. Changes are regularly made to the GFS model to improve its performance and forecast accuracy. It is a constantly evolving and improving weather model. Gridded data are available for download through the NOAA National Operational Model Archive and Distribution System (NOMADS). Forecast products and more information on GFS are available at the GFS home page.

March 22nd, 2021 note on GFS update

A note on the GFS update to v16 is available.

GFS now includes what used to be the WW3 ocean data.

June 12, 2019 note on GFS update

GFS is normally updated each year, year after year, steadily improving. This years update is larger than normal. For a number of years the folks at NOAA have been working on a big update to GFS - this was called the FV3-GFS.

This next generation GFS, now called GFS v15.1, has been available through LuckGrib for over a year as a research model. Many people had been downloading the new version of GFS and comparing its forecasts to the production version of GFS, at that time, GFS v14.

As of the 12Z cycle of GFS on June 12th, all downloads of GFS are of the newly updated model. If you have built GRIB requests for the next generation GFS, those requests will continue to work, however they now return the production GFS data.

If you are interested, the official service change notice detailing this update is available.

Contratulations to the entire NOAA team who worked on this update!

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