NOUS41 KWBC 121722
PNSWSH

TECHNICAL IMPLEMENTATION NOTICE 08-21
NATIONAL WEATHER SERVICE HEADQUARTERS WASHINGTON DC
125 PM EST WED MAR 12 2008

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/ PARTNERS AND OTHER USERS...NWS EMPLOYEES

FROM:      JOSEPH FACUNDO
           CHIEF...OBSERVING SYSTEMS BRANCH
           OFFICE OF OPERATIONAL SYSTEMS

SUBJECT:   AUTOMATED SURFACE OBSERVING SYSTEM /ASOS/
           COMMUNICATIONS TRANSFER FROM NWS TO FEDERAL AVIATION
           ADMINISTRATION /FAA/ FOR NASHVILLE TENNESSEE:
           EFFECTIVE MARCH 11 2008

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

THIS IS THE LATEST MESSAGE IN A SERIES OF TECHNICAL 
IMPLEMENTATION NOTICES /TIN/. THE LAST TIN ON THIS SUBJECT WAS 
TIN 08-13 DATED FEBRUARY 28 2008.

THIS MESSAGE LISTS THE EFFECTIVE DATE THE NWS ADVANCED WEATHER 
INTERACTIVE PROCESSING SYSTEM /AWIPS/ TRANSMISSION PATH HAS BEEN 
DISCONNECTED AT SPECIFIC ASOS LOCATIONS. ADDITIONAL MESSAGES WILL 
BE ISSUED WHEN THE AWIPS TRANSMISSION PATH HAS BEEN DISCONNECTED 
AT SUCCEEDING LOCATIONS.

LONG-LINE TRANSMISSION OF OBSERVATIONS FROM A SELECT GROUP OF 
ASOS LOCATIONS IS MOVING FROM NWS AWIPS NETWORK COMMUNICATIONS 
PATHWAY TO FAA AUTOMATED WEATHER OBSERVING SYSTEM /AWOS/-ASOS 
DATA ACQUISITION SYSTEM /ADAS/ NETWORK COMMUNICATIONS PATHWAY.

THIS TRANSITION...SCHEDULED THROUGH 2010...INVOLVES CONNECTION OF 
THESE ASOSES TO THE FAA ADAS TRANSMISSION PATH FOLLOWED BY 
DISCONNECTION FROM THE NWS AWIPS TRANSMISSION PATH. WHEN THE 
CHANGE OCCURS...SELECT OBSERVATIONS FROM THESE ASOS LOCATIONS 
WILL BE TRANSMITTED LONG-LINE ONLY THROUGH THE FAA ADAS NETWORK 
COMMUNICATIONS TRANSMISSION PATH. ON MARCH 11 2008 THE FOLLOWING 
ASOS LOCATION TRANSITIONED NETWORK COMMUNICATION PATHWAYS FROM 
NWS AWIPS TO FAA ADAS:  

     SID    LOCATION            STATE  NWS AWIPS TERMINATED

     KBNA   NASHVILLE           TN     03/11/08

WHEN NWS AWIPS TRANSMISSION PATH CONNECTION ENDS AT THIS 
LOCATION...SELECT OBSERVATIONS FOR THIS LOCATION WILL BE 
TRANSMITTED LONG-LINE FROM FAA TO NWS AND DISSEMINATED UNDER NEW 
WORLD METEOROLOGICAL ORGANIZATION /WMO/ HEADINGS/COLLECTIVES AND 
WILL NO LONGER BE AVAILABLE UNDER FORMER WMO 
HEADINGS/COLLECTIVES.

THIS CHANGE WILL AFFECT THE FOLLOWING ASOS OBSERVATIONS: ASOS 
AVIATION ROUTINE WEATHER REPORTS /METAR/...AVIATION SELECTED 
SPECIAL WEATHER REPORTS /SPECI/...STANDARD HYDRO METEOROLOGICAL 
EXCHANGE FORMAT /SHEF/ PRECIPITATION CRITERIA...SHEF HOURLY 
ACCUMULATION MESSAGES...DAILY SUMMARY MESSAGES /DSM/ AND MONTHLY 
SUMMARY MESSAGES /MSM/.

THE FOLLOWING ARE WMO BULLETIN HEADINGS/COLLECTIVES CHANGES FOR 
NASHVILLE TENNESSEE:

     METAR MESSAGES

ASOS      WMO HEADING    WMO COLLECTIVE      WMO COLLECTIVE
SID            OLD            OLD                 NEW

KBNA      SAUS44 KOHX    SAUS80 KWBC         SAUS70 KWBC


     SPECI MESSAGES

ASOS      WMO HEADING    WMO COLLECTIVE      WMO COLLECTIVE
SID            OLD            OLD                NEW

KBNA      SPUS44 KOHX    SPUS80 KWBC         SPUS70 KWBC


     ASOS SHEF PRECIPITATION CRITERIA MESSAGE

ASOS      WMO HEADING    WMO HEADING    FAA HUB 
SID            OLD            NEW

KBNA      SRUS64 KOHX    SRUS27 KZME    MEMPHIS


     ASOS SHEF HOURLY ROUTINE MESSAGE

ASOS      WMO HEADING    WMO HEADING    FAA HUB
SID            OLD            NEW

KBNA      SRUS74 KOHX    SRUS27 KZME    MEMPHIS


     ASOS DAILY SUMMARY MESSAGE

ASOS      WMO HEADING    WMO HEADING    FAA HUB
SID            OLD            NEW

KBNA      CXUS44 KOHX    CDUS27 KZME    MEMPHIS


     ASOS MONTHLY SUMMARY MESSAGE

ASOS      WMO HEADING    WMO HEADING    FAA HUB
SID            OLD            NEW

KBNA      CSUS44 KOHX    CSUS27 KZME    MEMPHIS

USERS WITH AUTOMATIC DECODERS SHOULD REPROGRAM THEIR SYSTEMS NOW 
TO RECOGNIZE THE NEW BULLETIN HEADINGS FOR THESE ASOS 
OBSERVATIONS. 

PLEASE BE ADVISED THAT DELIVERY OF THESE REPORTS AND MESSAGES TO 
NWS USERS MAY BE DELAYED APPROXIMATELY 5 MINUTES DUE TO INCREASED 
COMMUNICATIONS HANDLING BETWEEN FAA AND NWS. 

IF YOU HAVE ANY QUESTIONS ABOUT THESE CHANGES...PLEASE CONTACT:

  DAVE MANNARANO
  OFFICE OF OPERATIONAL SYSTEMS 
  W/OPS22
  SILVER SPRING MARYLAND 20910
  PHONE: 301-713-2093 EXT. 103
  E-MAIL: DAVID.MANNARANO@NOAA.GOV
            OR
  ANTHONY ROBINSON
  OFFICE OF CLIMATE WATER AND WEATHER SERVICES
  W/OS12
  SILVER SPRING MARYLAND 20910
  PHONE: 301-713-1373 EXT. 165 
  E-MAIL: ANTHONY.ROBINSON@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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