NOUS41 KWBC 211824



Technical Implementation Notice 13-05

National Weather Service Headquarters Washington DC

125 PM EST Thu Feb 21 2013


To:        Subscribers:

           -Family of Services

           -NOAA Weather Wire Service

           -Emergency Managers Weather Information Network


           Other NWS Partners, Users and Employees


From:      Rebecca Cosgrove

           Acting Chief, Production Management Branch

           NCEP Central Operations


Subject:   Replacement of Navy’s NOGAPS with NAVGEM:

           Effective February 27, 2013


Effective Wednesday, February 27, 2013, the Fleet Numerical

Meteorology and Oceanography Center (FNMOC) will replace its Navy

Operational Global Atmospheric Prediction System (NOGAPS) with

the Navy Global Environmental Model (NAVGEM). After this change

NOGAPS output will no longer be available on the NCEP FTP server;

it will be replaced with NAVGEM output. Note: This is a Navy-

driven change; NWS cannot give the typical advanced notice.


NOGAPS data is currently available at:


NAVGEM data will be available at:


Where YYYYMMDD is the Year, Month, Day string.


The filename structure is changing.









Where YYYYMMDDCC is the Year, Month, Day, Cycle string and HHH is

the forecast hour.


Finally, the Model Number and Process ID of the model in the GRIB

encoding is changing from 58 to 18.


For questions regarding these changes, please contact:


    Justin Cooke

    NCEP Central Operations

    College Park, Maryland

    Phone: 301-683-3833


NWS National Technical Implementation Notices are online at: