NOUS41 KWBC 021805



Service Change Notice 18-01

National Weather Service Headquarters Silver Spring MD

205 PM EDT Tue Jan 2 2018


To:        Subscribers

           -NOAA Weather Wire Service

           -Emergency Managers Weather Information Network


           Other NWS Partners, Users and Employees


From:      Dave Myrick

           NWS Office of Science and Technology Integration


Subject:   Addition of ESTOFS Atlantic SHEF

           Effective January 31, 2018


Effective on or about Wednesday, January 31, 2018, beginning

with the 1200 Universal Coordinated Time (UTC) cycle, the

National Centers for Environmental Prediction (NCEP) will add

the Extratropical Surge and Tide Operational Forecast System

(ESTOFS) Atlantic model Standard Hydrological Exchange Format

(SHEF) E products to NOAAPORT/SBN. NCEP will also correct the

SHEF identifiers on NCEP Web Services.


- Additional three text products to be added to NOAAPORT/SBN:


1. Harmonic tidal prediction (astronomical tides)



2. Combined water level (surges and tides)



3. Sub-tidal water levels (isolated surges)



Distributed 4 cycles/day at 00, 06, 12, 18 UTC at 500KB per



- Changes to SHEF ID on NCEP Web Services:




Where YYYY is year, MM is month and DD is day


The SHEF identifier will be changing within the following file


estofs.atl.tCCz.points.cwl.shef   HMIFU -> HMIFC

estofs.atl.tCCz.points.htp.shef   HMIFU -> HMIFB

estofs.atl.tCCz.points.swl.shef   HMIFU -> HMIFD

Where CC is cycle 00, 06, 12 or 18


NCEP urges all users to ensure their decoders can handle changes

in content order and volume changes. These elements may change

with future NCEP model implementations. NCEP will make every

attempt to alert users to these changes before implementation.


Questions, comments or requests regarding this change should be

directed to the contacts below.  We will review feedback and

decide whether to proceed.


For questions regarding science changes, please contact:


    Dr. Edward P. Myers

    Coastal Marine Modeling Branch

    Coast Survey Development Laboratory

    NOAA/NOS/Office of Coast Survey

    Silver Spring, MD


For questions regarding the data flow aspects of these data

sets, please contact:


   Carissa Klemmer

   NCEP/NCO Dataflow Team Lead

   College Park, Maryland



NWS National Service Change Notices are online at: