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TECHNICAL IMPLEMENTATION NOTICE 06-13...AMENDED
NATIONAL WEATHER SERVICE HEADQUARTERS WASHINGTON DC
950 AM EDT TUE APR 17 2007

TO:       FAMILY OF SERVICES /FOS/ SUBSCRIBERS...NOAA WEATHER
          WIRE SERVICE /NWWS/ SUBSCRIBERS...EMERGENCY MANAGERS
          WEATHER INFORMATION NETWORK /EMWIN/ SUBSCRIBERS...      
          NOAAPORT SUBSCRIBERS...OTHER NATIONAL WEATHER SERVICE
          /NWS/ CUSTOMERS AND PARTNERS...NWS EMPLOYEES

FROM:     PAUL HIRSCHBERG
          CHIEF...SCIENCE PLANS BRANCH
          OFFICE OF SCIENCE AND TECHNOLOGY

SUBJECT:  AMENDED: ADDITION OF SHORT RANGE ENSEMBLE FORECAST 
          /SREF/ SYSTEM PRODUCTS ON NOAAPORT: EFFECTIVE
          APRIL 24 2007

REFER TO: TECHNICAL IMPLEMENTATION NOTICE /TIN/ 06-13
          TRANSMITTED ON MARCH 17 2006

AMENDED TO CHANGE THE EFFECTIVE DATE OF THE SREF NOAAPORT 
ACTIVATION FROM JUNE 6 2006 TO APRIL 24 2007.  

OTHER AMENDMENTS TO THE ORIGINAL TIN INCLUDE:

1.  HYPERLINKS TO THE SREF WMO HEADINGS HAVE BEEN ADDED.

2.  THE NOAAPORT DIGITAL VIDEO BROADCAST PACKET ID /DVB PID/     
    UNDER WHICH THESE PRODUCTS WILL BE DISSEMINATED IS NOW     
    SPECIFIED AS NWSTG2.

3.  SREF MODEL RUN TIMES...DATA VOLUME ESTIMATES AND OTHER   
    ROUTINE PRODUCT INFORMATION ARE NOW INCLUDED. 

THE AMENDED TIN IS BELOW.

EFFECTIVE TUESDAY APRIL 24 2007...BEGINNING WITH THE 0900 
COORDINATED UNIVERSAL TIME /UTC/ RUN...THE NATIONAL CENTERS FOR 
ENVIRONMENTAL PREDICTION /NCEP/ WILL BEGIN THE DISSEMINATION OF 
SHORT RANGE ENSEMBLE FORECAST SYSTEM /SREF/ MODEL PRODUCTS VIA 
NOAAPORT.  THESE ENSEMBLE PRODUCTS WILL BE DISSEMINATED IN GRIB2 
FORMAT ON THE NOAAPORT NWSTG2 DVB PID.

NCEP PROVIDES FOUR SREF MODEL DISTRIBUTIONS PER DAY CORRESPONDING 
TO NOMINAL TIMES 0300...0900...1500 AND 2100 UTC. THE SREF GRIDS 
FROM EACH RUN WILL BE DISTRIBUTED VIA NOAAPORT APPROXIMATELY FIVE 
HOURS AFTER THE MODEL NOMINAL TIME. 

EACH DISTRIBUTION WILL CONSIST OF GRIB2 PRODUCTS FROM THREE 
GEOGRAPHICAL REGIONS: CONUS...ALASKA AND PACIFIC. THE DATA 
VOLUMES ASSOCIATED WITH EACH DISTRIBUTION WILL BE APPROXIMATELY 
AS FOLLOWS:

REGION    DATA VOLUME PER DISTRIBUTION
    
CONUS          19 MEGABYTES
ALASKA         14 MEGABYTES
PACIFIC        10 MEGABYTES
TOTAL          43 MEGABYTES

THE NOAAPORT STREAM OF SREF GRIDS WILL INCLUDE INITIALIZATION 
GRIDS PLUS THREE HOURLY FORECAST TIMES OUT TO 87 HOURS.  WMO 
HEADINGS AND OTHER SREF INFORMATION CAN BE FOUND AT THE NCEP 
CENTRAL OPERATIONS WEBSITES LISTED BELOW /USE LOWER CASE LETTERS 
EXCEPT FOR DRG...NCO AND SREF/.

CONUS WMO HEADINGS:

WWW.NCO.NCEP.NOAA.GOV/PMB/CHANGES/DRG-NCO-2006-002-SREF212.DOC

ALASKA WMO HEADINGS:

WWW.NCO.NCEP.NOAA.GOV/PMB/CHANGES/DRG-NCO-2006-003-SREF216.DOC

PACIFIC WMO HEADINGS:

WWW.NCO.NCEP.NOAA.GOV/PMB/CHANGES/DRG-NCO-2006-004-SREF243.DOC

THE EFFECTIVE DATE OF THIS CHANGE IS SOONER THAN SPECIFIED BY NWS 
POLICY. THE SHORTER ADVANCE LEAD TIME WAS CAUSED BY THE NECESSITY 
TO CONDUCT AN INTERNAL EVALUATION OF A TEST DATA STREAM PRIOR TO 
NOAAPORT ACTIVATION. THE SHORTER LEAD TIME WAS APPROVED BECAUSE 
IT IS EXPECTED THAT USERS WILL NOT HAVE TO MAKE MAJOR ADJUSTMENTS 
TO ACCOMMODATE THE CHANGES FROM THE ORIGINAL TIN. 

IF YOU HAVE QUESTIONS ABOUT THE CHANGES TO THIS TIN OR ABOUT THE 
NOAAPORT ACTIVATION OF THESE PRODUCTS...PLEASE CONTACT:

    BRIAN GOCKEL
    NWS...OFFICE OF SCIENCE AND TECHNOLOGY
    SILVER SPRING MARYLAND
    PHONE: 301 713 0304 X158
    EMAIL: BRIAN.GOCKEL@NOAA.GOV

IF YOU HAVE QUESTIONS ABOUT THE SREF PRODUCTS...PLEASE CONTACT:

    BRENT GORDON
    NCEP...PRODUCTION MANAGEMENT BRANCH
    CAMP SPRINGS MARYLAND
    PHONE: 301 763 8000 X7193
    EMAIL: BRENT.GORDON@NOAA.GOV

THIS AND OTHER NWS TECHNICAL IMPLEMENTATION NOTICES ARE AVAILABLE 
ONLINE AT /USE LOWER CASE LETTERS/:

    HTTP://WWW.NWS.NOAA.GOV/OM/NOTIF.HTM

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