[nws-changes] 20070827: amended chgs-GFS-based MOS and LAMP-: ADMIN NOTICE NOUS41 KWBC]

Mon Aug 27 06:31:02 MDT 2007

-------- Original Message --------

654 
NOUS41 KWBC 271225
PNSWSH

TECHNICAL IMPLEMENTATION NOTICE 07-42...AMENDED
NATIONAL WEATHER SERVICE HEADQUARTERS WASHINGTON DC
825 AM EDT FRI AUG 27 2007

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:     PAUL HIRSCHBERG
          SCIENCE PLANS BRANCH CHIEF
          OFFICE OF SCIENCE AND TECHNOLOGY /OST/

SUBJECT:  AMENDED: CHANGES TO GFS-BASED MOS AND LAMP 
          PRODUCTS: EFFECTIVE SEPTEMBER 11 2007

AMENDED TO SAY THE 12-HR MEAN TOTAL SKY COVER GUIDANCE WILL NOT 
BE REPLACED.  

THE THIRD CHANGE LISTED IN TIN 07-42...TRANSMITTED JUNE 21 
2007...STATED THE REPLACEMENT OF THE 12-HR MEAN TOTAL SKY COVER 
GUIDANCE IN THE EXTENDED-RANGE GFS MOS TEXT PRODUCT WITH 12-HR 
MEAN OPAQUE SKY COVER DERIVED FROM THE HOURLY OPAQUE CLOUD 
GUIDANCE.  DURING TESTING IT WAS DETERMINED THAT THE POST-
PROCESSING TECHNIQUE USED TO DERIVE THE 12-HR MEAN OPAQUE SKY 
COVER GUIDANCE PRODUCED LESS SKILLFUL GUIDANCE THAN THE 12-HR 
MEAN TOTAL SKY COVER GUIDANCE CURRENTLY BEING DISSEMINATED. AS A 
RESULT WE WILL NOT REPLACE THE EXISTING 12-HR SKY COVER GUIDANCE 
UNTIL SUCH TIME AS A FULL REDEVELOPMENT OF THE GUIDANCE CAN BE 
DONE. A NEW TIN WILL BE ISSUED WHEN THE REPLACEMENT DOES OCCUR.  
CHANGES 1 AND 2 IN TIN 07-42 WILL HAPPEN AS PLANNED ON SEPTEMBER 
11 2007.

EFFECTIVE TUESDAY SEPTEMBER 11 2007...BEGINNING WITH THE 1200 
UNIVERSAL COORDINATED TIME /UTC/ CYCLE...THE NWS WILL MAKE TWO 
CHANGES TO THE GLOBAL FORECAST SYSTEM /GFS/ -BASED MODEL OUTPUT 
STATISTICS /MOS/ SYSTEM. ONE OF THESE CHANGES IS TO THE GFS-
BASED LOCALIZED AVIATION MOS PROGRAM /LAMP/ PRODUCTS.

CHANGE 1:

STATIONS WILL BE ADDED TO THE GFS-BASED MOS VISIBILITY... 
OBSTRUCTION TO VISION AND PROBABILITY OF PRECIPITATION 
CHARACTERISTIC GUIDANCE FOR THE 0000...0600...1200...AND 1800 
CYCLES. THIS WILL BRING THE NUMBER OF STATIONS WITH GUIDANCE 
FOR THESE ELEMENTS TO 1593.  A LIST OF THE STATIONS AVAILABLE IN 
THE MOS GUIDANCE IS AVAILABLE AT /USE LOWER CASE LETTERS/:

     HTTP://WWW.NWS.NOAA.GOV/MDL/SYNOP/STADRG.HTML

GFS-LAMP WILL BEGIN PRODUCING VISIBILITY...CONDITIONAL 
VISIBILITY...AND OBSTRUCTION TO VISION GUIDANCE AT THESE 
STATIONS FOR THE 0000...0600...1200...AND 1800 UTC CYCLES...AND 
PRECIPITATION CHARACTERISTIC GUIDANCE FOR ALL EIGHT CYCLES.  A 
FULL DESCRIPTION OF THIS CHANGE IS AVAILABLE AT /USE LOWER CASE 
LETTERS/:

HTTP://WWW.NWS.NOAA.GOV/MDL/LAMP/GFSLAMP/DOCS/CHANGE_NOTICE_0620
2007.SHTML

THESE CHANGES WILL SLIGHTLY ALTER THE FORMAT OF THE MAV AND LAV 
TEXT PRODUCTS BECAUSE NEW LINES CONTAINING THIS GUIDANCE WILL BE 
ADDED TO THE EXISTING BULLETINS TO ACCOMMODATE THESE CHANGES.  
THE COMMUNICATION IDENTIFIERS FOR THE TEXT AND BUFR PRODUCTS 
AFFECTED BY THIS CHANGE ARE SHOWN IN TABLE 1 BELOW.  

CHANGE 2:

THE CLIMATOLOGICAL MAXIMUM AND MINIMUM TEMPERATURE VALUES 
CURRENTLY INCLUDED IN THE GFS-BASED MOS EXTENDED-RANGE MEX TEXT 
PRODUCTS WILL BE REPLACED WITH CLIMATOLOGICAL VALUES DERIVED 
FROM THE GRIDDED PARAMETER-ELEVATION REGRESSIONS ON INDEPENDENT 
SLOPES MODEL /PRISM/ NORMALS. THIS DATA IS AVAILABLE COURTESY 
OF A COOPERATIVE VENTURE BETWEEN OREGON STATE UNIVERSITY AND THE 
UNITED STATES DEPARTMENT OF AGRICULTURE-NATURAL RESOURCES 
CONSERVATION SERVICE. THE PRISM NORMALS ARE CREATED USING DATA 
FROM 1971 TO 2000. CLIMATOLOGICAL MAXIMUM AND MINIMUM 
TEMPERATURES WILL BE AVAILABLE FOR ALL SITES IN THE MEX TEXT 
PRODUCT THAT ARE LOCATED IN THE CONTIGUOUS UNITED STATES AND 
ALASKA. THE COMMUNICATION IDENTIFIERS FOR THE MEX TEXT PRODUCTS 
ARE SHOWN IN TABLE 2 BELOW.  

TABLE 1.  COMMUNICATION IDENTIFIERS FOR THE GFS-BASED MOS AND 
LAMP TEXT AND BUFR PRODUCTS AFFECTED BY STATION UPDATES. NOTE 
THAT THE 69 NEW STATIONS ARE CURRENTLY IN THE BUFR PRODUCTS.  
THE ONLY CHANGE WILL BE THAT THE GUIDANCE VALUES FOR THE 
ELEMENTS LISTED ABOVE WILL NO LONGER BE SET TO MISSING.

WMO HEADING    AWIPS ID         WMO HEADING    

MOS TEXT PRODUCTS               MOS BUFR PRODUCTS

FOUS21 KWNO    MAVNE1           JSML31 KWNO                           
FOUS22 KWNO    MAVSE1           JSML32 KWNO       
FOUS23 KWNO    MAVNC1           JSML33 KWNO
FOUS24 KWNO    MAVSC1           JSML34 KWNO
FOUS25 KWNO    MAVRM1           JSML35 KWNO
FOUS26 KWNO    MAVWC0           JSML36 KWNO
FOAK37 KWNO    MAVAJK           JSML37 KWNO

LAMP TEXT PRODUCT               LAMP BUFR PRODUCTS

FOUS11 KWNO    LAVUSA           JSMF11 KWNO
                                JSMF12 KWNO     
                                JSMF13 KWNO     
                                JSMF14 KWNO     
                                JSMF15 KWNO     
                                JSMF16 KWNO     
                                JSMF17 KWNO    

TABLE 2.  COMMUNICATION IDENTIFIERS FOR THE GFS-BASED MOS MEX 
EXTENDED-RANGE PUBLIC WEATHER TEXT PRODUCTS AFFECTED BY CHANGES 
2 AND 3.

WMO HEADING    AWIPS ID   

FEPA20 KWNO    MEXPA0
FEUS21 KWNO    MEXNE1  
FEUS22 KWNO    MEXSE1   
FEUS23 KWNO    MEXNC1         
FEUS24 KWNO    MEXSC1         
FEUS25 KWNO    MEXRM1         
FEUS26 KWNO    MEXWC0         
FEAK37 KWNO    MEXAJK
FEAK38 KWNO    MEXAFC
FEAK39 KWNO    MEXAFG

IF YOU HAVE QUESTIONS ABOUT THE MOS GUIDANCE...PLEASE CONTACT:

     REBECCA COSGROVE
     MDL/SILVER SPRING MARYLAND
     PHONE:  301-713-0023 EXT. 124
     E-MAIL: REBECCA.COSGROVE at NOAA.GOV

LINKS TO THE MOS PRODUCTS...ALONG WITH DESCRIPTIONS...CAN BE 
FOUND AT /USE LOWER CASE LETTERS/:

     HTTP://WWW.NWS.NOAA.GOV/MDL/SYNOP

IF YOU HAVE ANY QUESTIONS ABOUT THE LAMP GUIDANCE...PLEASE 
CONTACT:

     JUDY GHIRARDELLI
     MDL/SILVER SPRING MARYLAND
     PHONE:  301-713-0056 EXT. 194
     E-MAIL: JUDY.GHIRARDELLI at NOAA.GOV

LINKS TO THE GFS-LAMP PRODUCTS...ALONG WITH DESCRIPTIONS...CAN 
BE FOUND AT /USE LOWER CASE LETTERS/:

     HTTP://WWW.NWS.NOAA.GOV/MDL/LAMP

THIS AND OTHER NWS TECHNICAL IMPLEMENTATION NOTICES ARE 
AVAILABLE AT /USE LOWER CASE LETTERS/:

     HTTP://WWW.NWS.NOAA.GOV/OM/NOTIF.HTM

$$