[nws-changes] 20071024: addition of GFS-based MOS guidance-Alaska-Fwd: ADMIN NOTICE NOUS41 KWBC]

[Linda Miller]

-------- Original Message --------

089 
NOUS41 KWBC 241530
PNSWSH

TECHNICAL IMPLEMENTATION NOTICE 07-82
NATIONAL WEATHER SERVICE HEADQUARTERS WASHINGTON DC
1130 AM EDT WED OCTOBER 24 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 /OST/

SUBJECT:  ADDITION OF GFS-BASED GRIDDED MOS GUIDANCE FOR ALASKA: 
          EFFECTIVE FEBRUARY 26 2008

EFFECTIVE FEBRUARY 26 2008...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 at 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

THIS AND OTHER NWS TECHNICAL IMPLEMENTATION NOTICES ARE AVAILABLE 
ON THE INTERNET AT THE /USE LOWER CASE LETTERS/... 

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

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