NOUS41 KWBC 011454
PNSWSH         

SERVICE CHANGE NOTICE 07-39
NATIONAL WEATHER SERVICE HEADQUARTERS WASHINGTON DC
1054 AM EDT FRI JUN 1 2007

TO:       FAMILY SERVICE /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...AND NWS EMPLOYEES

FROM:     THERESE Z. PIERCE
          MARINE AND COASTAL WEATHER SERVICES CHIEF
          BRANCH

SUBJECT:  THE GREAT LAKES OPEN LAKE FORECAST /GLF/ CHANGES 
          FROM A NON-SEGMENTED TO SEGMENTED FORMAT: EFFECTIVE  
          OCTOBER 2 2007

REFER TO: SERVICE CHANGE NOTICE /SCN/ 07-38: TRANSMITTED 
          JUNE 1 2007

EFFECTIVE TUESDAY OCTOBER 2 2007 AT 1300 COORDINATED UNIVERSAL 
TIME /UTC/...OR 0900 EASTERN DAYLIGHT TIME /EDT/...OR 0800 
CENTRAL DAYLIGHT TIME /CDT/...ALL GREAT LAKES WEATHER FORECAST 
OFFICES /WFO/ ISSUING THE GREAT LAKES OPEN LAKE FORECAST /GLF/ 
WILL CHANGE FROM THE CURRENT NON-SEGMENTED FORMAT TO A SEGMENTED 
FORMAT.  TABLE 1 PROVIDES A COMPLETE LIST OF AFFECTED GLF 
PRODUCTS.

TABLE 1. LIST OF GLF PRODUCTS AFFECTED BY THIS SERVICE CHANGE

       WFO		        WMO HEADING    AWIPS ID  

       BUFFALO NY		FZUS61 KBUF    GLFSL   
       BUFFALO NY           	FZUS61 KBUF    GLFLO   
       CLEVELAND OH         	FZUS61 KCLE    GLFLE    
       CHICAGO IL           	FZUS63 KLOT    GLFLM  
       DETROIT MI           	FZUS63 KDTX    GLFSC    
       DETROIT MI           	FZUS63 KDTX    GLFLH    
       MARQUETTE MI         	FZUS63 KMQT    GLFLS    

THE NEW SEGMENTED FORMAT WILL ALLOW WFOS ISSUING THE GLF PRODUCTS 
TO BE MORE AREA-SPECIFIC IN THEIR OPEN LAKE FORECASTS. FOR 
EXAMPLE THE CURRENT GEOGRAPHIC DIVISIONS USED IN THE GLF...SUCH 
AS /NORTH HALF/...WILL BE REPLACED BY SMALLER GREAT LAKES OPEN 
LAKE MARINE ZONES GROUPED IN SEGMENTS BY SIMILAR WEATHER 
CONDITIONS. THIS ARRANGEMENT IS SIMILAR TO THE FORMAT NOW USED BY 
THE GREAT LAKES NEARSHORE FORECASTS...ALSO A SEGMENTED PRODUCT.  

EXAMPLES OF THE CURRENT GLF PRODUCT FORMAT AND THE NEW FORMAT 
EFFECTIVE OCTOBER 2 2007 ARE POSTED ONLINE AT /USE LOWER CASE 
LETTERS/:

     HTTP://WWW.WEATHER.GOV/OS/NOTIFICATION/RESOURCES/GLF.PDF

USERS ARE URGED TO READ SERVICE CHANGE NOTICE 07-38...CHANGES TO 
GREAT LAKES MARINE ZONES AND UGC CODES: EFFECTIVE OCTOBER 2 
2007...AS IT MAY BE NECESSARY TO MAKE CHANGES IN THEIR 
COMMUNICATIONS DATABASES BY OCTOBER 2 2007.  SEE TABLE 1 FOR THE 
COMPLETE LIST OF AFFECTED GLF PRODUCTS.  

IF YOU HAVE ANY QUESTIONS OR COMMENTS...PLEASE CONTACT:
  
WAYNE WEEKS 
NATIONAL WEATHER SERVICE
MARINE AND COASTAL SERVICES BRANCH
1325 EAST WEST HIGHWAY
SILVER SPRING MD 20910
PHONE: 301-713-1677 EXT. 129 
E-MAIL: WAYNE.WEEKS@NOAA.GOV 
  
THIS AND OTHER NWS SERVICE CHANGE NOTICES ARE AVAILABLE
ONLINE AT /USE LOWER CASE LETTERS/:
  
       HTTP://WWW.NWS.NOAA.GOV/OM/NOTIF.HTM
  
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