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-------- Original Message --------735 NOUS41 KWBC 061654
PNSWSH
TECHNICAL IMPLEMENTATION NOTICE 10-03
NATIONAL WEATHER SERVICE HEADQUARTERS WASHINGTON DC
1155 AM EST WED JANUARY 6 2010
TO: NATIONAL WEATHER SERVICE /NWS/ OFFICES
FAMILY OF SERVICES /FOS/ SUBSCRIBERS
FEDERAL AVIATION ADMINISTRATION /FAA/ OFFICES
OTHER NWS AVIATION CUSTOMERS AND PARTNERS
FROM: CYNTHIA ABELMAN
CHIEF...AVIATION SERVICES BRANCH
SUBJECT: ENHANCEMENT OF GRAPHICAL TURBULENCE
GUIDANCE /GTG/: EFFECTIVE FEBURARY 9 2010
NOTE: THE FOLLOWING CHANGES HAVE NO IMPACT ON NOAA WEATHER WIRE SERVICE SUBSCRIBERS.
THE GTG HAS BEEN AVAILABLE AS AN NWS OPERATIONAL PRODUCT SINCE MARCH 2003. 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/. EFFECTIVE FEBURARY 9 2010 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 HEADERS FOR EACH FLIGHT LEVEL /FL/ AS WELL AS COMPOSITE GRIB FILE CHANGE INFORMATION. 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://WWW.WEATHER.AERO/TURBULENCE/DESCRIPTION.PHP
THE CURRENT PRODUCT DESCRIPTION DOCUMENT FOR THE GTG IS
AVAILABLE AT /USE LOWER CASE LETTERS/:
HTTP://PRODUCTS.WEATHER.GOV/
TABLE 1: NEW GTG WMO 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
200 YVW*46 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 LEVEL INDICATOR IN THE COMPOSITE GRIB FILE WILL CHANGE TO
.../ATMOS COL/. THIS ENHANCEMENT WAS MADE TO INDICATE THE DATA
IN THE FILE IS A COMPOSITE FOR ALL LEVELS FROM FL450 DOWN TO
FL100.
THE GTG PRODUCT WILL CONTINUE TO BE AVAILABLE IN GRIB FORMAT
FROM THE FOLLOWING SYSTEMS:
1. SATELLITE BROADCAST NETWORK /SBN/ NOAAPORT CHANNEL2. 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:
MICHAEL PAT MURPHY WARNING COORDINATION METEOROLOGIST AVIATION WEATHER CENTER7220 NW 101ST TERRACE ROOM 101
KANSAS CITY MO 64153PHONE: 816-584-72048 E-MAIL: MICHAEL.PAT.MURPHY@xxxxxxxx
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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