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PNSWSH

TECHNICAL IMPLEMENTATION NOTICE 06-59...AMENDED
NATIONAL WEATHER SERVICE HEADQUARTERS WASHINGTON DC
1010 AM EST WED DEC 6 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
         AVIATION SERVICES BRANCH CHIEF

SUBJECT: AMENDED: ENHANCEMENT OF GRAPHICAL TURBULENCE GUIDANCE 
         /GTG/: EFFECTIVE JANUARY 8 2007 POSTPONED UNTIL 
         FURTHER NOTICE

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

AMENDED TO POSTPONE UNTIL FURTHER NOTICE THE EFFECTIVE DATE FOR 
IMPLEMENTATION OF AN ENHANCED VERSION OF THE GTG PRODUCT 
ORIGINALLY SCHEDULED FOR JANUARY 8 2007. THE POSTPONEMENT WILL 
ALLOW COMPLETION OF COORDINATION ACTIVITIES BETWEEN NWS AND THE 
FEDERAL AVIATION ADMINISTRATION /FAA/. A FOLLOW-UP TIN WILL BE 
ISSUED WHEN THE NEW IMPLEMENTATION DATE IS SET.

THIS PRODUCT 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 
DIAGNOSIS 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.  A COMPOSITE FIELD REPRESENTING THE 
MAXIMUM TURBULENCE VALUE BETWEEN 10 AND 45 THOUSAND FEET FOR 
EACH ANALYSIS AND FORECAST IS ALSO AVAILABLE.  

MORE INFORMATION ABOUT THE GTG PRODUCT CAN BE OBTAINED AT /USE 
LOWER CASE LETTERS/:

  HTTP://ADDS.AVIATIONWEATHER.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
---     -----------
100	YVW*70 KKCI
110     YVW*67 KKCI
120     YVW*65 KKCI
130     YVW*62 KKCI
140	YVW*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. THE SATELLITE BROADCAST NETWORK /SBN/ NOAAPORT CHANNEL
    
2. NATIONAL WEATHER SERVICE FTP SERVERS AT /USE LOWER CASE 
LETTERS EXCEPT AS NOTED BELOW/:
                                                                                   
  ftp://tgftp.nws.noaa.gov/SL.us008001/DC.avspt/

NOTE: IN THE INTERNET ADDRESS ABOVE SL AND DC MUST BE IN UPPER 
CASE LETTERS.

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 ANY 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@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

$$
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