NOUS41 KWBC 201805
PNSWSH

TECHNICAL IMPLEMENTATION NOTICE 08-43
NATIONAL WEATHER SERVICE HEADQUARTERS WASHINGTON DC
205 PM EDT TUE MAY 20 2008

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

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

SUBJECT:  CHANGES TO OUTPUT FROM HIRES WINDOW MODEL: 
          EFFECTIVE AUGUST 5 2008

EFFECTIVE TUESDAY AUGUST 5 2008...WITH THE 1200 COORDINATED 
UNIVERSAL TIME /UTC/ RUN...THE NATIONAL CENTERS FOR ENVIRONMENTAL 
PREDICTION /NCEP/ WILL INTRODUCE SOME CHANGES TO THE OUTPUT FROM 
THE HIRES WINDOW /HIRESW/ MODEL. 

NCEP RUNS THE WEATHER RESEARCH AND FORECAST /WRF/ VERSIONS OF THE 
NON-HYDROSTATIC HYBRID VERTICAL COORDINATE MESOSCALE MODEL /NMM/ 
AND THE NATIONAL CENTER FOR ATMOSPHERIC RESEARCH /NCAR/ ADVANCED 
RESEARCH WRF /ARW/. THESE RUNS ARE MADE OVER 5 DOMAINS COVERING 
THE UNITED STATES AND PUERTO RICO. THE RUNS ARE NESTED INSIDE OF 
THE PARENT NORTH AMERICAN MESO MODEL /NAM/...OBTAINING INITIAL 
AND BOUNDARY CONDITIONS FROM THE NAM. BELOW IS THE RUN SCHEDULE 
AND THE ASSOCIATED DOMAINS:

  0000 UTC: EASTERN US AND HAWAII
  0600 UTC: WESTERN US AND PUERTO RICO
  1200 UTC: EASTERN US AND HAWAII
  1800 UTC: ALASKA AND PUERTO RICO

THESE HIRESW RUNS ARE CANCELLED ON THE NCEP OPERATIONAL 
SUPERCOMPUTER WHEN HURRICANE MODELS ARE RUNNING DURING THE 
TROPICAL SEASON BUT ARE RUN ON THE DEVELOPMENT SUPERCOMPUTER WHEN 
RESOURCES PERMIT.  
 
UPCOMING CHANGES: THE CHANGES LISTED BELOW WILL BE INCORPORATED 
INTO THE MODEL:

1.  THE GENERATING PROCESS IDENTIFIER WITHIN THE HIRESW NMM
    OUTPUT WILL CHANGE FROM 84 TO 112. 
2.  THE GENERATING PROCESS IDENTIFIER WITHIN THE HIRESW ARW
    OUTPUT WILL CHANGE FROM 84 TO 116.
3.  VERTICAL MOTION WILL BE PRODUCED AT THREE ADDITIONAL     
    ISOBARIC LEVELS...200 250 AND 1000 HPA...IN THE OUTPUT OF 
    BOTH THE HIRESW NMM AND HIRESW ARW FOR ALL DOMAINS. 

THESE MODEL CHANGES WILL IMPACT ALL DISSEMINATION ROUTES... 
INCLUDE THE NWS PUBLIC FTP SERVER AND THE NCEP PUBLIC FTP SERVER. 
THESE DATA SETS ARE NOT CURRENTLY AVAILABLE ON NOAAPORT.

A CONSISTENT PARALLEL FEED OF DATA WILL BECOME AVAILABLE ON THE 
NCEP FTP SERVER ON JUNE 17 2008 AT /USE LOWERCASE/:

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

USERS ARE ENCOURAGED 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 ANY VOLUME 
CHANGES THAT MAY BE FORTHCOMING. THESE ELEMENTS MAY CHANGE WITH 
FUTURE NCEP MODEL IMPLEMENTATIONS. NCEP WILL MAKE EVERY ATTEMPT 
TO ALERT USERS TO THESE CHANGES BEFORE IMPLEMENTATIONS.

FOR QUESTIONS CONCERNING THESE CHANGES...PLEASE CONTACT: 
 
     GEOFF DIMEGO
     NCEP...MESOSCALE MODELING BRANCH
     CAMP SPRINGS MARYLAND
     PHONE: 301 763 8000 X7221
     EMAIL: GEOFF.DIMEGO@NOAA.GOV
 OR
     MATTHEW PYLE
     NCEP...MESOSCALE MODELING BRANCH
     CAMP SPRINGS MARYLAND
     PHONE: 301 763 8000 X7242
     EMAIL: MATTHEW.PYLE@NOAA.GOV
 
FOR QUESTIONS REGARDING THE DATAFLOW ASPECTS OF THESE DATA 
SETS...PLEASE CONTACT THE NCEP/NCO/PMB DATAFLOW HELP DESK AT THE 
EMAIL ADDRESS BELOW.

     EMAIL: 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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