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PNSWSH

TECHNICAL IMPLEMENTATION NOTICE 08-04 AMENDED
NATIONAL WEATHER SERVICE HEADQUARTERS WASHINGTON DC
1045 AM EST THU FEB 21 2008

TO:       SUBSCRIBERS:
          -FAMILY OF SERVICES 
          -NOAA WEATHER WIRE SERVICE 
          -EMERGENCY MANAGERS WEATHER INFORMATION NETWORK 
          OTHER NWS PARTNERS... USERS AND NWS EMPLOYEES

FROM:     JASON TUELL
          CHIEF...SCIENCE PLANS BRANCH
          OFFICE OF SCIENCE AND TECHNOLOGY /OST/

SUBJECT:  AMENDED: NOAA WAVE WATCH III MODEL GLOBAL GRIB OUTPUT   
          MODIFICATION: EFFECTIVE FEBRUARY 26 2008

REFER TO: TECHNICAL IMPLEMENTATION NOTICE /TIN/ 08-04 TRANSMITTED
          ON JANUARY 10 2008

AMENDED TO DELAY IMPLEMENTATION FROM FEBRUARY 19 TO FEBRUARY 26 
2008. 

EFFECTIVE TUESDAY FEBRUARY 26 2008...WITH THE 1200 COORDINATED 
UNIVERSAL TIME /UTC/ RUN...THE NATIONAL CENTERS FOR ENVIRONMENTAL 
PREDICTION /NCEP/ WILL MODIFY THE GLOBAL OUTPUT GRIB2 FILE FROM 
THE NOAA WAVE WATCH III /NWW3/ MODEL.

SCIENTIFIC/TECHNICAL CHANGES:

THE DOMAIN OF THE GRID IS BEING EXTENDED FROM 78 N TO 90 N.  FOR 
NOW...THE DATA IN THE ADDITIONAL GRID POINTS WILL BE MARKED AS 
UNDEFINED. THE GRID POINTS WILL BE POPULATED WITH DATA AT A LATER 
NWW3 UPGRADE.

DATAFLOW CHANGES:

THE GRIB2 FILE WHICH WILL BE DIRECTLY IMPACTED RESIDES ON THE 
NCEP FTP SERVER AT THE ADDRESS BELOW /USE ALL LOWER CASE 
LETTERS/.
                                                              
FTP://FTPPRD.NCEP.NOAA.GOV/PUB/DATA/NCCF/COM/WAVE/PROD/WAVE.YYYYM
MDD/MULTI_1.GLO_30M.TCCZ.GRIB2

NOAAPORT CUSTOMERS DO NOT CURRENTLY RECEIVE THIS DATA SET HENCE 
NO IMPACT IS EXPECTED TO DATA WHICH IS RECEIVED BY NOAAPORT 
CUSTOMERS.

DISCLAIMER: NCEP WOULD ENCOURAGE ALL USERS TO ENSURE THEIR 
DECODERS ARE FLEXIBLE AND ARE ABLE TO ADEQUATELY HANDLE CHANGES 
IN CONTENT ORDER...PARAMETER FIELDS CHANGING ORDER...CHANGES IN 
THE SCALING FACTOR COMPONENT WITHIN THE PDS OF THE GRIB FILES AND 
ALSO ANY VOLUME CHANGES WHICH MAY BE FORTHCOMING. THESE ELEMENTS 
MAY CHANGE WITH FUTURE NCEP MODEL IMPLEMENTATIONS. NCEP WILL MAKE 
EVERY ATTEMPT TO ALERT USERS TO THESE CHANGES PRIOR TO ANY 
IMPLEMENTATIONS.

PARALLEL DATA SETS ARE AVAILABLE ON THE NCEP FTP SERVER AT THE 
LINK BELOW. NCEP ENCOURAGES ALL USERS TO EVALUATE THESE DATA SETS 
TO ENSURE THAT THEIR SYSTEMS ARE PREPARED FOR THE UPCOMING CHANGE  
/USE LOWERCASE LETTERS/:

     FTP://FTPPRD.NCEP.NOAA.GOV/PUB/DATA/NCCF/COM/WAVE/PARA

THE ENVIRONMENTAL MODELING CENTER /EMC/ HAS A PUBLICLY AVAILABLE 
WEB SITE WHICH CAN PROVIDE USERS MORE INFORMATION CONCERNING ALL 
NCEP MODELING SYSTEMS /USE LOWERCASE LETTERS/:

     HTTP://WWW.EMC.NCEP.NOAA.GOV

SPECIFIC INFORMATION REGARDING THE NEW WAVE MODEL IMPLEMENTATION 
CAN BE FOUND AT THE LINK BELOW /USE LOWERCASE LETTERS/:

     HTTP://POLAR.NCEP.NOAA.GOV/NEW.WAVES/WELCOME.HTML

IF YOU HAVE ANY QUESTIONS CONCERNING THE SCIENTIFIC CHANGES 
WITHIN THE MODELING SYSTEM...PLEASE CONTACT: 

     HENDRIK TOLMAN
     NCEP/EMC...CHIEF MARINE MODELING BRANCH
     CAMP SPRINGS MARYLAND
     PHONE: 301 763 8000 X7253
     EMAIL: HENDRIK.TOLMAN@NOAA.GOV

IF YOU HAVE ANY QUESTIONS CONCERNING THE DATAFLOW ASPECTS OF THIS 
IMPLEMENTATION...PLEASE SEND AN EMAIL TO THE NCEP/NCO/PMB 
DATAFLOW HELPDESK: 

     NCEP.PMB.DATAFLOW@NOAA.GOV 

NWS TECHNICAL IMPLEMENTATION NOTICES ARE ONLINE AT  
/USE LOWER CASE LETTERS/: 

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

$$
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