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[nws-changes] 20080225: GFSl-based Griddeed MOSFwd: ADMIN NOTICE NOUS41 KWBC]

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-------- Original Message --------
251 NOUS41 KWBC 251345 
PNSWSH

TECHNICAL IMPLEMENTATION NOTICE 07-82 AMENDED
NATIONAL WEATHER SERVICE HEADQUARTERS WASHINGTON DC
845 AM EST MON FEB 25 2008

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

FROM:  JASON TUELL
 CHIEF...SCIENCE PLANS BRANCH
 OFFICE OF SCIENCE AND TECHNOLOGY /OST/
SUBJECT: AMENDED: ADDITION OF GFS-BASED GRIDDED MOS GUIDANCE FOR ALASKA: EFFECTIVE DATE OF FEBRUARY 26 2008 POSTPONED 

REFER TO: TECHNICAL IMPLEMENTATION NOTICE /TIN/ 07-82
 TRANSMITTED ON OCTOBER 24 2007

AMENDED TO POSTPONE EFFECTIVE DATE FOR ADDING ALASKA GRIDDED MOS
GUIDANCE FROM FEBRUARY 26 2008 UNTIL FURTHER NOTICE. A FOLLOW-UP
TIN WILL BE ISSUED WHEN A NEW IMPLEMENTATION DATE IS SET.
THE NWS WILL PRODUCE NEW GLOBAL FORECAST SYSTEM /GFS/ -BASED GRIDDED MOS GUIDANCE FOR ALASKA AND DISSEMINATE IT ON THE SATELLITE BROADCAST NETWORK /SBN/...NOAAPORT...AND THE NWS FTP SERVER. THESE GUIDANCE PRODUCTS WILL BE IN GRIB2 FORMAT. THE NEW COMMUNICATION IDENTIFIERS FOR THESE PRODUCTS ARE SHOWN IN TABLE 1 BELOW. THE GRIDDED MOS PRODUCTS WILL CONTAIN GUIDANCE ON A ROUGHLY 3 KM POLAR STEREOGRAPHIC GRID COVERING THE SAME EXPANSE AS THE NATIONAL DIGITAL FORECAST DATABASE /NDFD/ ALASKA GRID. GRIDS WILL BE GENERATED FROM THE 0000 AND 1200 UNIVERSAL COORDINATED TIME /UTC/ MODEL RUNS AT PROJECTIONS OF 1 TO 7 DAYS IN ADVANCE. GUIDANCE WILL INITIALLY BE AVAILABLE FOR THE FOLLOWING ELEMENTS WITH OTHERS TO BE ADDED AT A LATER DATE: 

 DAYTIME MAXIMUM AND NIGHTTIME MINIMUM TEMPERATURE
 2-METER SPOT TEMPERATURE
 2-METER SPOT DEWPOINT TEMPERATURE
 RELATIVE HUMIDITY
 WIND SPEED
 WIND DIRECTION
 PROBABILITY OF PRECIPITATION /6 AND 12 HOUR/
 PROBABILITY OF THUNDERSTORMS /3...6 AND 12 HOUR/
THE ALASKA PROBABILITY OF THUNDERSTORM GUIDANCE WILL ONLY BE VALID DURING THE WARM SEASON FROM MAY 1 THROUGH SEPTEMBER 30.
A WEB PAGE PROVIDING MORE INFORMATION REGARDING GRID SPECIFICATIONS, GRIB2 ENCODING AND ELEMENTS FOR WHICH GUIDANCE IS AVAILABLE IS REFERENCED BELOW.
THE GRIB2 PRODUCTS WILL BE PROVIDED AS PART OF THE NATIONAL DIGITAL GUIDANCE DATABASE /NDGD/. THEY WILL INITIALLY BE AVAILABLE ON THE NWS FTP SERVER AT /USE LOWER CASE LETTERS EXCEPT FOR SL...ST...DF...DC...GT...AND AR/: 

FTP://TGFTP.NWS.NOAA.GOV/SL.US008001/ST.EXPR/DF.GR2/DC.NDGD/GT.MO
SGFS/AR.ALASKA
TABLE 1: COMMUNICATION IDENTIFIERS FOR THE GFS-BASED GRIDDED MOS GRIB2 PRODUCTS FOR ALASKA. EACH GRIB2 PRODUCT HAS A UNIQUE WMO HEADER. LISTED BELOW ARE REPRESENTATIONS OF THE WMO HEADERS. A COMPLETE LIST OF GRIDDED MOS WMO HEADERS IS AVAILABLE AT /USE LOWER CASE LETTERS/: 

 HTTP://WWW.NWS.NOAA.GOV/MDL/SYNOP/GMOS/GMOSHEADERS.PDF

    WMO HEADING         ELEMENT

    LBRXXX KWBQ         WIND DIRECTION
    LCRXXX KWBQ WIND SPEED
    LDRXXX KWBQ 12-HR PROBABILITY OF PRECIPITATION
    LERXXX KWBQ 2-METER TEMPERATURE
    LFRXXX KWBQ 2-METER DEW POINT TEMPERATURE
    LGRXXX KWBQ DAYTIME MAXIMUM TEMPERATURE
    LHRXXX KWBQ NIGHTTIME MINIMUM TEMPERATURE
    LJRXXX KWBQ 6-HR PROBABILITY OF THUNDERSTORMS
    LRRXXX KWBQ RELATIVE HUMIDITY
    LURXXX KWBQ 6-HR PROBABILITY OF PRECIPITATION
    LXRXXX KWBQ 12-HR PROBABILITY OF THUNDERSTORMS
LYRXXX KWBQ 3-HR PROBABILITY OF THUNDERSTORMS A WEB PAGE OUTLINING THE GRIDDED MOS GUIDANCE AND THE FTP SERVER STRUCTURE CAN BE FOUND ONLINE AT /USE LOWER CASE LETTERS/: 

 HTTP://WWW.NWS.NOAA.GOV/MDL/SYNOP/GMOS.HTML
IF YOU HAVE QUESTIONS ABOUT THESE PRODUCTS OR THE MOS GUIDANCE... PLEASE CONTACT: 

KATHRYN GILBERT
MDL/SILVER SPRING MARYLAND
PHONE:  301-713-0023 EXT. 130
E-MAIL: KATHRYN.GILBERT@xxxxxxxx
LINKS TO THE MOS PRODUCTS... ALONG WITH DESCRIPTIONS... CAN BE FOUND AT /USE LOWER CASE LETTERS/... 

 HTTP://WWW.NWS.NOAA.GOV/MDL/SYNOP
NWS TECHNICAL IMPLEMENTATION NOTICES ARE ONLINE AT /USE LOWER CASE LETTERS/... 
 HTTP://WWW.NWS.NOAA.GOV/OM/NOTIF.HTM

$$
NNNN
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