NOUS41 KWBC 231844



Technical Implementation Notice 15-21

National Weather Service Headquarters Washington DC

245 PM EDT Thu Apr 23 2015


To:       Subscribers:

          -Family of Services

          -NOAA Weather Wire Service

          -Emergency Managers Weather Information Network


          Other NWS partners, Users and Employees


From:     Rebecca Cosgrove

          Chief, NCEP Production Management Branch


Subject:  Discontinuation of the NCEP FTP Server Effective

          August 18, 2015


Effective on August 18, 2015, at 1200 Coordinated Universal Time

(UTC), the National Centers for Environmental Prediction (NCEP)

will discontinue the NCEP FTP (FTPPRD) server. At that time, all

data that was available on FTPPRD will only be available on the

NOAA Operational Model Archive and Distribution System (NOMADS)

server. Data on this server will not be accessible via FTP

downloads. Rather, FTP customers will be required to transition

to http for data downloads. 


The benefit of this change is that NOMADS http data will be

transitioned to a Content Delivery Network (CDN) with increased

server redundancy. This change will provide greater reliability

and improved up time for web content and data availability. In

addition, transitioning this content to a CDN will remove

reliance on the NCEP network for http downloads, which is

expected to provide improved download performance for http users.


On August 18, 2015, NCEP will discontinue the following data

dissemination services:


All data at the above sites will be available at the following sites:


The directory structure for http data on NOMADS is similar to the

data structure at the discontinued FTPPRD sites:


Note the /pub/ field and the variable /model/ field in the

directory structure on NOMADS.


Users are encouraged to establish parallel feeds of the data from

NOMADS starting May 15, 2015.


Available tools for http data downloads include wget or cURL. 

Information about how to use wget can be found at:


For information about how to use cURL for fast downloading of

grib2 files, please reference:


For questions regarding data retrievals from NOMADS, contact:


 Kelly Kempisty

 NCEP/NCO Dataflow Team

 College Park, MD



For questions regarding the transition to the CDN, contact:


 Cameron Shelton

 NCEP/Shared Infrastructure Services Branch

 College Park, MD



NWS National Technical Implementation Notices are online at: