NOUS41 KWBC 171555 AAA



Technical Implementation Notice 16-04

National Weather Service Headquarters Washington DC

1155 AM EDT Thu Mar 17 2016


To:       Subscribers:

          -NOAA Weather Wire Service

          -Emergency Managers Weather Information Network


          Other NWS Partners, Users and Employees


From:     Timothy McClung

          Portfolio Manager

          Office of Science and Technology Integration


Subject   Amended:  Global Forecast System (GFS) product removal

          from NOAAPORT: Effective March 23, 2016


Amended to remove the addition of the 20km Pacific Region grid

at this time. NCEP needs to amend the grid dimensions, then will

send a new TIN notification when we will turn it on.


Effective on or about March 23, 2016, beginning with the 1200

Coordinated Universal Time (UTC) run, the National Centers for

Environmental Prediction (NCEP) will both remove and add GFS

model output on NOAAPORT


1. Remove 381 km Northern Hemisphere grid

2. Remove the GRIB1 SSTOI grid

3. Remove legacy fax charts


Two Public Information Statements were issued on January 22,

2013, and February 19, 2014, requesting comments on the proposed

termination of multiple legacy GFS products.


Based on responses received, NCEP was given permission to remove

products as long as there was a comparable, or better,



1) NCEP will terminate Grid #201, 381 km Northern Hemisphere

(Polar Stereographic) from NOAAPORT

  - A 1.0 degree global grid was added to NOAAPORT on March 10,

2015 as a replacement to the 381 km grid. Please reference the

TIN for information:


  - Run 4 cycles per day at 00z, 06z, 12z and 18z

  - WMO Headers will be as follows:

  Template T1 T2 A1 A2 ii cccc

  cccc is KWBC, where C is Global Forecast System (GFS)


  T1 = L & M

  T2 = B,C,E,G,H,O,P,R,T,U,V

  A1 = A

  A2 specifies the forecast hours as follows:

     A = 00; B=06; C=12; D=18; E=24; F=30; G=36; H=42;

     I=48; J=60; K=72; L=84; M=96; N=108; O=120; P=132;

     Q=144; R=156; S=168; T=180; U=192; V=204; W=216;

     X=228; Y=240 (Note: T1 is Y)

     M=54; N=66; T=78; U=90; V=102; W=114;

     Z=126; 138; 150; 162; 174; 186; 198; 210; 222;

     234 (Note: T1 is Z)

  ii = 10,15,20,25,30,40,50,70,85,86,97,98,99


For a complete list of these WMO headers being removed please

reference this link:


2) Remove the GRIB1 Sea Surface Temperature OI on NOAAPORT

  - Find a similar product here


  - Runs once daily at 12z

  - WMO Headers are as follows:



3) World Area Forecast Fax Charts of Temperature and Winds will

be removed from NOAAPORT

  - Find similar graphical information on the NCEP Model

Analysis and Guidance (MAG) website:



  - Runs twice daily at 00z and 06z

  - Flight Levels: 300, 340, 390

  - WMO headers being removed will be as follows:








For questions regarding these changes, please contact:


     Carissa Klemmer

     NWS/NCEP Central Operations

     College Park, MD



NWS National Technical Implementation Notices are online at: