NOUS41 KWBC 271340



Technical Implementation Notice 16-20

National Ocean Service Headquarters Washington DC

940 AM EDT Mon Jun 27 2016


To:       Subscribers:

          -NOAA Weather Wire Service

          -Emergency Managers Weather Information Network


          Other NWS and NOS partners and NWS and NOS employees


From:     Timothy McClung

          Portfolio Manager

          Office of Science and Technology Integration


Subject:  FNMOC NAVGEM Upgrade on NCEP Servers Effective June 28,



The National Centers for Environmental Prediction (NCEP) hosts

the Fleet Numerical Meteorology and Oceanography Center's (FNMOC)

Navy Global Environmental Model (NAVGEM) on its ftp/http servers.

Effective with the 12z cycle on Tuesday, June 28, 2016, the

NAVGEM will be upgraded. The following changes can be expected:

- The resolution will increase from 1.0 degree to 0.5 degree

- The format will change from GRIB1 to GRIB2

- The file names will change to reflect the new GRIB2 format

  navgem_YYYYMMDDCCfFFFF will change to


  Where YYYYMMDD is year, month and day

  Where CC is cycle

  Where FFF is forecast hour 00-180


The data is located on the following NCEP servers:





Note: This is a Navy controlled model that is only hosted by

NCEP. NWS cannot give the typical advanced notice.


If you have any questions, contact:


Carissa Klemmer

NCEP Dataflow Team Lead

College Park, MD


National Technical Implementation Notices are online at: