NCEP Downscaled GFS by NAM Extension (DGEX) Home Page

Welcome to the web page of the NCEP Downscaled GFS by NAM Extension (DGEX) forecast. The DGEX is initialized by interpolating the 78-h operational NAM forecast to a smaller 12-km domain. A 78-h to 192-h forecast of the NMMB is made (same version that is running in the NAM), using the previous 6-h old GFS forecast for lateral boundary conditions. Click here to see the computational domain of the DGEX runs over the CONUS and Alaska.

This is the current schedule:

0000Z, 1200Z : Alaska

0600Z, 1800Z : CONUS

These links will send you to a web page with the latest run for the specified DGEX domain:

CONUS; cycle = 2017031918

Alaska; cycle = 2017032000

DISCLAIMER : This web page is not "operational" and therefore not subject to 24-h monitoring by NCEP's Central Operations staff.

For more info on the DGEX runs, email Eric Rogers at or Geoff DiMego at