GFS — Global Forecast System NWP

Global 0.25-degree NWP forecast, updated every 6 hours, 16-day horizon. Free global baseline forecast; the reference against which regional models and AI forecasts (AIFS, GraphCast) are benchmarked.

Provider	NOAA NCEP
Delivery mode	stream
CNR score	80
Cadence	PT6H
Origin	https://www.nco.ncep.noaa.gov/pmb/products/gfs/