Replacement of ETA-based MOS guidance with NAM-based MOS guidance

For those of us who follow the guidance products, this is an important update regarding ETA MOS data, from the National Weather Service:

TECHNICAL IMPLEMENTATION NOTICE 08-89
NATIONAL WEATHER SERVICE HEADQUARTERS WASHINGTON DC
255 PM EDT MON NOV 3 2008

TO:    SUBSCRIBERS:
     -FAMILY OF SERVICES
     -NOAA WEATHER WIRE SERVICE
     -EMERGENCY MANAGERS WEATHER INFORMATION NETWORK
     -NOAAPORT
     OTHER NWS PARTNERS...USERS AND EMPLOYEES

FROM:   JASON TUELL
     CHIEF...SCIENCE PLANS BRANCH
     OFFICE OF SCIENCE AND TECHNOLOGY

SUBJECT: REPLACEMENT OF ETA-BASED MOS GUIDANCE WITH NAM-BASED
     MOS GUIDANCE: EFFECTIVE DECEMBER 9 2008

REFER TO: PUBLIC INFORMATION STATEMENT...COMMENT PERIOD RELEASED
     JULY 21 2008.

EFFECTIVE TUESDAY DECEMBER 9 2008 WITH THE 1200 UNIVERSAL 
COORDINATED TIME /UTC/ CYCLE RUN...THE NWS WILL REPLACE THE 
MODEL OUTPUT STATISTICS /MOS/ GUIDANCE BASED ON THE ETA MODEL 
WITH MOS GUIDANCE BASED ON THE NORTH AMERICAN MESOSCALE /NAM/ MODEL.

A PUBLIC INFORMATION STATEMENT WAS ISSUED ON JULY 21 2008 
REQUESTING COMMENTS ON THE PROPOSED REPLACEMENT OF THE ETA-BASED 
MOS GUIDANCE WITH NAM-BASED MOS GUIDANCE. BASED ON THE RESPONSES 
RECEIVED...THE DECISION WAS MADE TO REPLACE THE ETA MOS WITH NEW 
NAM MOS GUIDANCE. FOR DETAILS ABOUT THIS DECISION PLEASE SEE THE 
MEMORANDUM FOR THE RECORD AT /USE LOWER CASE LETTERS/: 

  HTTP://WWW.WEATHER.GOV/INFOSERVICECHANGES/ETAMOSDECISION.PDF

THE NAM MOS GUIDANCE WILL BE ISSUED FOR THE SAME ELEMENTS AS THE 
ETA MOS GUIDANCE AND WILL BE AVAILABLE FOR ONE TO THREE DAYS IN 
ADVANCE OF THE 0000 AND 1200 UTC MODEL RUN TIMES. GUIDANCE WILL 
BE AVAILABLE IN ALPHANUMERIC TEXT MESSAGES AND BUFR PRODUCTS 
WHICH WILL USE THE SAME WMO HEADINGS AND AWIPS IDS AS THE 
CURRENT ETA MOS PRODUCTS. THE WMO HEADINGS FOR THE PRODUCTS ARE 
OUTLINED IN TABLE 1 BELOW. THE PRODUCTS WILL BE DISSEMINATED ON 
THE SATELLITE BROADCAST NETWORK /SBN/...NOAAPORT...AND THE NWS 
FTP SERVER. 

USERS WILL SEE THE FOLLOWING CHANGES DUE TO THE REPLACEMENT OF 
THE ETA MOS WITH NAM MOS:

1. STATISTICAL EQUATIONS FOR SOME ELEMENTS REDEVELOPED USING NAM        
  MODEL DATA AS INPUT
2. CHANGES TO THE STATIONS FOR WHICH GUIDANCE IS AVAILABLE
3. THUNDERSTORM GUIDANCE NOW AVAILABLE TO 72 HOURS IN TEXT  
  PRODUCT
4. PRODUCT DELIVERY APPROXIMATELY 10 MINUTES LATER DUE TO LONGER
  MODEL RUN TIME
5. ETA MOS LABEL IN TEXT AND BUFR PRODUCTS CHANGED TO NAM MOS

PLEASE REFER TO THE WEBSITE LISTED BELOW FOR MORE SPECIFIC 
DETAILS ABOUT THE CHANGES OUTLINED ABOVE: /USE LOWER CASE 
LETTERS/

  HTTP://NWS.NOAA.GOV/MDL/SYNOP/NAM.PHP

A TECHNICAL PROCEDURES BULLETIN DESCRIBING THE FORMAT OF THE NAM 
MOS TEXT PRODUCTS IS AVAILABLE AT THE FOLLOWING WEB SITE /USE 
LOWER CASE LETTERS/:

  HTTP://NWS.NOAA.GOV/MDL/SYNOP/TPB/MDLTPB08-01.PDF


TABLE 1. COMMUNICATION IDENTIFIERS FOR THE NAM-BASED MOS 
GUIDANCE.
NOTE THAT THESE IDENTIFIERS ARE CURRENTLY USED TO DISSEMINATE 
THE ETA MOS GUIDANCE. ON DECEMBER 8 2008 THE NAM GUIDANCE WILL 
BE SENT UNDER THESE HEADINGS.
 
WMO HEADING     AWIPS ID    PRODUCT TYPE 

FOPA40 KWNO     METPA0     TEXT
FOUS44 KWNO     METNE1     TEXT
FOUS45 KWNO     METSE1     TEXT
FOUS46 KWNO     METNC1     TEXT
FOUS47 KWNO     METSC1     TEXT
FOUS48 KWNO     METRM1     TEXT
FOUS49 KWNO     METWC1     TEXT
FOAK47 KWNO     METAJK     TEXT
FOAK48 KWNO     METAFC     TEXT
FOAK49 KWNO     METAFG     TEXT
JSML10 KWNO     N/A      BUFR 
JSML11 KWNO     N/A      BUFR
JSML12 KWNO     N/A      BUFR
JSML13 KWNO     N/A      BUFR
JSML14 KWNO     N/A      BUFR
JSML15 KWNO     N/A      BUFR
JSML16 KWNO     N/A      BUFR
JSML17 KWNO     N/A      BUFR

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

  KATHRYN GILBERT
  MDL/SILVER SPRING MARYLAND
  PHONE: 301-713-0023 EXT. 130
  E-MAIL: KATHRYN.GILBERT@NOAA.GOV

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

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

NWS TECHNICAL IMPLEMENTATION NOTICES ARE ONLINE AT /USE LOWER 
CASE LETTERS/: 

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

$$
NNNN

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