NOUS41 KWBC 011415



Public Information Statement 17-28

National Weather Service Headquarters Silver Spring, MD

1020 AM EDT Tue Aug 1 2017


To:       Subscribers:

          -NOAA Weather Wire Service

          -Emergency Managers Weather Information Network


          Other NWS partners and NWS employees


From:     Craig Hodan

          Chief, Dissemination Systems Branch


Subject:  Soliciting comments on the proposed transition of the

          NWS EMWIN FTP service through September 15, 2017


The NWS is accepting comments until September 15, 2017, on the

proposed transition of the legacy Emergency Managers Weather

Information Network (EMWIN) File Transfer Protocol (FTP) service

to the NWS Integrated Dissemination Program (IDP) enterprise



The EMWIN FTP file service is transitioning to a new

consolidated enterprise infrastructure referred to as IDP.  The

new EMWIN IDP FTP service is scheduled to be operational on

November 1, 2017. Users of the EMIWN legacy FTP service are

encouraged to transition to the new service prior to January 31,

2018, the scheduled date for deactivating the legacy FTP server.


The new EMWIN IDP FTP service provides the following



-Eliminates the need for users to register for and use assigned

user name and passwords to access the EMWIN archive files.  The

new EMWIN IDP FTP service is hosted on an anonymous FTP server,

providing open public access 24x7, over the public Internet.


-Increases the FTP service operational availability by employing

a backup IDP anonymous FTP service that becomes operational in

the event of a catastrophic failure of the primary IDP anonymous

FTP service.


Two separate and unique sets of EMWIN archive files will be

presented on the EMWIN IDP FTP service: one for the older

generation GOES-15 satellite (GOES-West) and one for the newer

generation GOES-16 satellite (GOES-East). The unique

characteristics of their individual satellite broadcast services

require separate archives as a result of:


-Different file naming conventions used for the WMO product

files appearing on the GOES-West and GOES-East broadcasts. 

Products on GOES-West retain the legacy EMWIN eight character

file name, while the GOES-East will implement the 63 to 66

character WMO compliant file name convention. Additional

information on the GOES-East file naming convention is available

for review here:



-The maximum data rate on the GOES-West and GOES-East satellite

broadcast services will be 19.2 kbps and 256 kbps, respectively. 

The higher data rate may periodically deliver a greater number

of products in a given time interval, potentially increasing the

archive file product count for comparable periods of time.


The NWS EMWIN IDP FTP archive file names and descriptions are:


*** TEXT PRODUCTS *** ....... two minute file ....... six minute file ....... twenty minute file ....... one hour file ....... three hour file


*** BINARY FILES (IMAGES) *** ....... fifteen minute file ....... one hour file ....... three hour file


Additional information on the new IDP anonymous FTP service and

files is found in the Enterprise EMWIN FTP Service Description

document available here:


A Service Change Notice (SCN) will be sent before transitioning

operations to the new EMWIN IDP FTP service.


Questions or comments about this service should be emailed to:


National Public Information Statements are online at: