GFS & GEFS

This site uses the 00Z runs of the NCEP Global Forecast System (GFS) and Global Ensemble Forecast System (GEFS) at 0.5° resolution. The former is a deterministic model run out to 16 days, while the latter is a 31-member ensemble run out to 35 days (as of the implementation of GEFSv12 on 23 September 2020).

Products available:

GFS & GEFS: 10 hPa 60°N zonal-mean zonal wind ensemble plume

GEFS: 35-day 10 hPa 60°N zonal-mean zonal wind ensemble plume

GFS & GEFS: 10 hPa 60°N zonal-mean zonal wind forecast evolution “chiclet”

GFS: 10 hPa geopotential height and wind map

GEFS: 100 hPa 60°N zonal-mean zonal wind tercile categories

GFS: 60°N zonal-mean zonal wind cross section

GFS: 40-80°N eddy geopotential height cross section