NOUS41 KWBC 031350
PNSWSH

TECHNICAL IMPLEMENTATION NOTICE 08-69
NATIONAL WEATHER SERVICE HEADQUARTERS WASHINGTON DC
950 AM EDT WED SEP 3 2008

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

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

SUBJECT:  ADDITION OF NEW ELEMENTS TO GFS-BASED 
          GRIDDED MOS GUIDANCE FOR ALASKA:  
          EFFECTIVE NOVEMBER 18 2008

EFFECTIVE TUESDAY NOVEMBER 18 2008...BEGINNING WITH THE 1200 
COORDINATED UNIVERSAL TIME /UTC/...THE NWS WILL PRODUCE 
ADDITIONAL ELEMENTS IN THE GLOBAL FORECAST SYSTEM /GFS/-BASED 
GRIDDED MOS GUIDANCE FOR ALASKA. THESE GUIDANCE PRODUCTS WILL BE 
DISSEMINATED ON THE SATELLITE BROADCAST NETWORK /SBN/... 
NOAAPORT...AND THE NWS FTP SERVER. THE PRODUCTS WILL BE IN GRIB2 
FORMAT. THE COMMUNICATION IDENTIFIERS 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 UTC MODEL RUNS AT PROJECTIONS 
OF 1 TO 7 DAYS IN ADVANCE. 

GUIDANCE WILL BE MADE AVAILABLE FOR THE FOLLOWING ADDITIONAL 
ELEMENTS:

  WIND SPEED
  WIND DIRECTION
  WIND GUSTS
  6- AND 12-HR PROBABILITY OF PRECIPITATION /POP/
  SKY COVER

GRIDDED MOS GUIDANCE FOR ALASKA IN GRIB2 IS AVAILABLE ON THE NWS 
FTP SERVER AT /USE LOWER CASE EXCEPT FOR 
SL...ST...DF...DC...GT...AND AR/:

FTP://TGFTP.NWS.NOAA.GOV/SL.US008001/ST.EXPR/DF.GR2/DC.NDGD/
GT.MOSGFS/AR.ALASKA

TABLE 1: COMMUNICATION IDENTIFIERS FOR THE GFS-BASED GRIDDED MOS 
GRIB2 PRODUCTS FOR ALASKA SCHEDULED TO BE IMPLEMENTED.  EACH 
GRIB2 PRODUCT HAS A UNIQUE WMO HEADING. LISTED BELOW ARE 
REPRESENTATIONS OF THE WMO HEADINGS. A COMPLETE LIST OF GRIDDED 
MOS WMO HEADINGS IS AVAILABLE AT /USE LOWER CASE LETTERS/:

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

WMO HEADING         ELEMENT

LCRXXX KWBQ         WIND SPEED
LBRXXX KWBQ         WIND DIRECTION
LWRXXX KWBQ         WIND GUSTS 
LURXXX KWBQ         6-HR POP
LDRXXX KWBQ         12-HR POP
LARXXX KWBQ         SKY COVER

A WEB PAGE OUTLINING THE GRIDDED MOS GUIDANCE AND THE FTP SERVER 
STRUCTURE CAN BE FOUND AT /USE LOWER CASE/:

  HTTP://WWW.NWS.NOAA.GOV/MDL/SYNOP/GMOS.PHP

FOR QUESTIONS ABOUT THESE PRODUCTS OR THE MOS GUIDANCE CONTACT:

  KATHRYN GILBERT
  MDL/SILVER SPRING MARYLAND
  PHONE:  301-713-0023 EXT. 130
  E-MAIL: KATHRYN.GILBERT@NOAA.GOV

LINKS TO THE MOS PRODUCTS...ALONG WITH DESCRIPTIONS...CAN BE 
FOUND AT /USE LOWER CASE LETTERS/:
  
  HTTP://WWW.NWS.NOAA.GOV/MDL/SYNOP

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

  HTTP://WWW.WEATHER.GOV/OS/NOTIF.HTM

$$
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