20060829: GTG enhancement-Fwd: ADMIN NOTICE NOUS41 KWBC]

Tue Aug 29 07:01:23 MDT 2006

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

052 
NOUS41 KWBC 291258
PNSWSH

TECHNICAL IMPLEMENTATION NOTICE 06-59
NATIONAL WEATHER SERVICE HEADQUARTERS WASHINGTON DC
900 AM EDT TUE AUG 29 2006

TO:      NATIONAL WEATHER SERVICE /NWS/ OFFICES
         FAMILY OF SERVICES /FOS/ SUBSCRIBERS
         FEDERAL AVIATION ADMINISTRATION /FAA/ OFFICES
         OTHER NWS AVIATION CUSTOMERS AND PARTNERS

FROM:    KEVIN L. JOHNSTON
         CHIEF...AVIATION SERVICES BRANCH

SUBJECT: ENHANCEMENT OF GRAPHICAL TURBULENCE GUIDANCE /GTG/:
         EFFECTIVE JANUARY 8 2007

NOTE: THE FOLLOWING CHANGES HAVE NO IMPACT ON NOAA WEATHER WIRE 
SERVICE SUBSCRIBERS.

EFFECTIVE JANUARY 8 2007 AT 1300 COORDINATED UNIVERSAL TIME 
/UTC/ THE NWS AVIATION WEATHER CENTER /AWC/ IN KANSAS CITY 
MISSOURI WILL IMPLEMENT AN ENHANCED VERSION OF THE GRAPHICAL 
TURBULENCE GUIDANCE /GTG/ PRODUCT. THIS ENHANCEMENT EXTENDS THE 
VERTICAL DOMAIN OF THE GTG INTO THE MIDDLE LEVEL OF THE 
ATMOSPHERE ... BETWEEN 10 AND 19 THOUSAND FEET ABOVE MEAN SEA 
LEVEL /FLIGHT LEVELS 100 TO 190/. TABLE 1 CONTAINS THE 
COMMUNICATION HEADINGS FOR EACH FLIGHT LEVEL /FL/.

THE GTG IS AN AUTOMATICALLY GENERATED TURBULENCE PRODUCT THAT 
DIAGNOSES AND PREDICTS THE LOCATION AND INTENSITY OF TURBULENCE 
OVER THE CONTERMINOUS UNITED STATES AND ADJACENT COASTAL WATERS 
/CONUS/. THE GTG HAS BEEN AVAILABLE AS AN NWS OPERATIONAL 
PRODUCT SINCE MARCH 2003.

THE GTG PRODUCES AN ANALYSIS... 1... 2 AND 3-HOUR TURBULENCE 
FORECAST EVERY HOUR AND A 6... 9 AND 12-HOUR FORECAST EVERY 3 
HOURS IN GRIB FORMAT. THIS PRODUCT ALSO PROVIDES A COMPOSITE 
FIELD REPRESENTING THE MAXIMUM TURBULENCE VALUE BETWEEN 10 AND 
45 THOUSAND FEET FOR EACH ANALYSIS AND FORECAST.  

FOR MORE INFORMATION ABOUT THE GTG PRODUCT, GO TO /USE LOWER 
CASE LETTERS/:

     HTTP://ADDS.AVIATIONWEATHER.NOAA.GOV/TURBULENCE/

THE CURRENT PRODUCT DESCRIPTION DOCUMENT FOR THE GTG IS 
AVAILABLE AT /USE LOWER CASE LETTERS/:

     HTTP://PRODUCTS.WEATHER.GOV/

TABLE 1: NEW GTG HEADERS:

FL      HEADING
---     -----------
100YVW*70 KKCI
110     YVW*67 KKCI
120     YVW*65 KKCI
130     YVW*62 KKCI
140YVW*60 KKCI
150     YVW*57 KKCI
160     YVW*55 KKCI
170     YVW*53 KKCI
180     YVW*50 KKCI
190     YVW*48 KKCI

WHERE   * = A = 00 HOUR ANALYSIS
        * = B = 01 HOUR FORECAST
        * = C = 02 HOUR FORECAST
        * = D = 03 HOUR FORECAST
        * = G = 06 HOUR FORECAST
        * = J = 09 HOUR FORECAST
        * = M = 12 HOUR FORECAST

THE GTG PRODUCT WILL CONTINUE TO BE AVAILABLE IN GRIB FORMAT 
FROM THE FOLLOWING SYSTEMS:

1. SATELLITE BROADCAST NETWORK /SBN/ NOAAPORT CHANNEL

2. NWS FTP SERVERS AT /USE LOWER CASE LETTERS EXCEPT SL AND DC 
MUST BE IN UPPER CASE/:

     FTP://TGFTP.NWS.NOAA.GOV/SL.US008001/DC.AVSPT                                                                                      

3. THE FAMILY OF SERVICES /FOS/ HIGH RESOLUTION DATA SERVICE AND 
SERVER ACCESS SERVICE.

ADDITIONAL INFORMATION ON NWS AVIATION PRODUCT DISSEMINATION IS 
AVAILABLE AT /USE LOWER CASE LETTERS/:

HTTP://WEATHER.GOV/OS/DISEMSYS.SHTML  

IF YOU HAVE QUESTIONS REGARDING THIS PRODUCT...CONTACT: 

  CLINTON WALLACE
  CHIEF, AVIATION SUPPORT BRANCH
  AVIATION WEATHER CENTER
  7220 NW 101ST TERRACE    
  ROOM 101
  KANSAS CITY MO 64153
  PHONE: 816-584-72048    
  E-MAIL: CLINTON.WALLACE at NOAA.GOV

THIS AND OTHER NWS TECHNICAL IMPLEMENTATION NOTICES ARE 
AVAILABLE ONLINE AT /USE LOWER CASE LETTERS/

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

$$

-- 
Linda Miller - lmiller at unidata.ucar.edu
Community Services, Unidata
University Corporation for Atmospheric Research
P.O. Box 3000
Boulder, CO 80307-3000
303-497-8646 fax: 303-497-8690 

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