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887 NOUS41 KWBC 202145 PNSWSH PUBLIC INFO. STATEMENT...TECHNICAL IMPLEMENTATION NOTICE 01-30 NATIONAL WEATHER SERVICE HEADQUARTERS WASHINGTON DC 445 PM EST TUE NOV 20 2001 TO: FAMILY OF SERVICES /FOS/ SUBSCRIBERS...NOAA WEATHER WIRE SERVICE /NWWS/ SUBSCRIBERS...EMERGENCY MANAGERS WEATHER INFORMATION NETWORK /EMWIN/ SUBSCRIBERS...OTHER NATIONAL WEATHER SERVICE /NWS/ CUSTOMERS OF AVIATION DATA AND FORECASTS...NWS EMPLOYEES FROM: FRED TOEPFER ACTING CHAIR...NWS COMMITTEE ON ANALYSIS AND FORECAST TECHNIQUES IMPLEMENTATION /CAFTI/ SUBJECT: NEW WEATHER ELEMENTS TO BE ADDED TO THE AVIATION MODEL MOS GUIDANCE PACKAGE...EFFECTIVE NOVEMBER 27 2001 ...THE FOLLOWING CHANGES HAVE NO IMPACT ON NOAA WEATHER WIRE SERVICE SUBSCRIBERS... EFFECTIVE WITH THE 1800 UTC CYCLE ON NOVEMBER 27 2001...NEW WEATHER ELEMENT GUIDANCE WILL BE ADDED TO THE 0600/1800 UTC AVN MOS GUIDANCE PACKAGES. THESE PACKAGES...WHICH WERE FIRST IMPLEMENTED IN OCTOBER 2001...WILL CONTAIN GUIDANCE FOR: MAXIMUM/MINIMUM TEMPERATURE 2-M TEMPERATURE AND DEW POINT TOTAL SKY COVER WIND DIRECTION AND SPEED PROBABILITY OF PRECIPITATION /POP/ PROBABILITY OF THUNDERSTORMS CONDITIONAL PROBABILITY OF SEVERE WEATHER CONDITIONAL PROBABILITY OF PRECIPITATION TYPES /FREEZING RAIN OR SNOW/ PRECIPITATION TYPE CEILING HEIGHT THE ALPHANUMERIC TEXT MESSAGES ARE AVAILABLE ON AWIPS UNDER THE MAV PRODUCT IDENTIFIER AND ON THE SATELLITE BROADCAST NETWORK /SBN/ AND THE FAMILY OF SERVICES WITH THE WMO HEADERS: FOPA20 KWNO...FOUS21-26 KWNO...AND FOAK37-39 KWNO. NOTE THAT THESE ARE THE SAME PRODUCT IDENTIFIERS USED FOR THE 0000/1200 UTC AVN MOS PACKAGES. THE 0600/1800 UTC GUIDANCE IS AVAILABLE FOR THE SAME SITES AND IN THE SAME FORMAT AS THE CURRENT 0000/1200 UTC PACKAGES. PRODUCTS CONTAINING ALL OF THE AVN MOS GUIDANCE IN BUFR ARE ALSO AVAILABLE. FOR THE WMO HEADERS OF THE BUFR PRODUCTS...PLEASE SEE /USE LOWER CASE LETTERS/: HTTP://WWW.NWS.NOAA.GOV/TDL/SYNOP/STADRG.HTM GUIDANCE FOR PRECIPITATION AMOUNT...VISIBILITY...AND OBSTRUCTION TO VISION WILL BE ADDED TO THE MESSAGES DURING THE SPRING OF 2002. TECHNICAL PROCEDURES BULLETIN NO. 481 DESCRIBES THE 0600/1800 UTC AVN MOS MESSAGES AND IS AVAILABLE AT THE FOLLOWING WEB SITE /USE LOWER CASE/: HTTP://WWW.NWS.NOAA.GOV/OM/TPB/INDDRAFT.HTM THE 0600/1800 UTC PACKAGES ARE ISSUED AT APPROXIMATELY 1030/2230 UTC. BECAUSE THESE GUIDANCE PACKAGES WILL UPDATE THE 0000/1200 UTC PACKAGES...USERS MAY WANT TO RETAIN PREVIOUS 0000/1200 UTC PRODUCTS TO ENSURE A COMPLETE SET OF WEATHER ELEMENT GUIDANCE. IF YOU HAVE ANY QUESTIONS ABOUT THIS CHANGE...PLEASE CONTACT: PAUL DALLAVALLE AT THE METEOROLOGICAL DEVELOPMENT LABORATORY IN SILVER SPRING MARYLAND AT 301-713-1065 X 174...OR VIA E-MAIL: PAUL.DALLAVALLE@xxxxxxxx. THIS AND OTHER NWS TECHNICAL IMPLEMENTATION NOTICES ARE AVAILABLE ON THE INTERNET AT /USE LOWER CASE/: HTTP://WWW.NWS.NOAA.GOV/OM/NOTIF.HTM END
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