NOUS41 KWBC 271109



Technical Implementation Notice 15-15

National Weather Service Headquarters Washington DC

Relayed for the National Ocean Service

710 AM EDT Fri Mar 27 2015


To:      Subscribers:

         -Family of Services

         -NOAA Weather Wire Service

         -Emergency Managers Weather Information Network


         Other NWS Partners and NWS Employees


From:    Frank Aikman

         Chief, Marine Modeling and Analysis Programs

         NOS Office of Coast Survey


Subject: Addition of ESTOFS Pacific over the SBN and NOAAPORT.

         GRIB Encoding Change to ESTOFS Pacific on NCEP Servers

         Effective June 9, 2015


Effective June 9, 2015, beginning with the 1200 Coordinated

Universal Time (UTC) cycle, ESTOFS Pacific will be added to the

Satellite Broadcast Network (SBN) and NOAAPORT. These grids will

be disseminated in GRIB2 format. The GRIB2 header for grids will

be updated so that the Process ID identifies the Extra-tropical

Storm Surge Pacific Domain. The Process ID identifier will change

from 14 to 17 on NCEP's servers.


For technical details about ESTOFS please see: Technical

Information Notice (TIN) 14-27:


ESTOFS Pacific output is reprojected from the ADvanced

CIRCulation (ADCIRC) native finite element grid to the 2.5 km

National Digital Forecast Database (NDFD) Continental United

States grid for the west coast, 2.5 km NDFD Hawaii grid, and 6 km

NDFD Alaska grid.


GRIB2 files are created for each hourly prediction during a

forecast cycle, consisting of records of combined water level

(surge with tide), harmonic tidal prediction (astronomical

tides), and sub-tidal water levels (the isolated surge). GRIB2

files will be available 4 1/2 to 5 1/2 hours after the synoptic

time (OO, 06, 12, 18 UTC). The per cycle data volume will be

approximately 412 MB.


The WMO Headings for these products will be as follows: 


   T1:     Data Format of GRIB2 - E

   T2:     Parameter code - C, E, or H

   A1:     Grid code - A for Alaska, D for CONUS (west coast),

                       H for Hawaii

   A2:     Forecast time interval- one of


   II:     Layer or level: 88

   CCCC:   KWBM   


For a complete listing of ESTOFS Pacific WMO Headers please refer

to the following web page:


ESTOFS Pacific is also available as netCDF and GRIB2 files via the NCEP

server at:


ESTOFS Pacific GRIB2 output is also disseminated via NCEP's NOAA

Operational Model Archive and Distribution System (NOMADS) server at:


For questions concerning the technical details of ESTOFS contact:


Dr. Jesse Feyen

Marine Modeling and Analysis Programs

Coast Survey Development Laboratory

NOAA/NOS/Office of Coast Survey

Silver Spring, MD


For questions regarding the dataflow aspect of ESTOFS contact:


Kelly Kempisty

NCEP/NCO Dataflow Team

College Park, MD


National Technical Implementation Notices are online at: