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PNSWSH 

TECHNICAL IMPLEMENTATION NOTICE 03-49...AMENDED
NATIONAL WEATHER SERVICE HEADQUARTERS WASHINGTON DC 
225 PM EST MON FEB 1 2004

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/ CUSTOMERS AND 
 	   PARTNERS...NWS EMPLOYEES 

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

SUBJECT:   AMENDED...CHANGES TO ETA MOS GUIDANCE CONTENT AND STATION 
           LIST...EFFECTIVE FEBRUARY 24 AT 1200 UTC

REFER TO:  TECHNICAL IMPLEMENTATION NOTICE /TIN/ 03-48 /AMENDED/ 
           FOR OTHER ETA MOS CHANGES TO BE IMPLEMENTED 
           FEBRUARY 17 2004

AMENDED TO:

	-	CHANGE EFFECTIVE DATE
	-	NOTE THAT GUIDANCE BEYOND 60-HRS IN ADVANCE WILL NOT BE 
		AVAILABLE FOR ANY WEATHER ELEMENTS UNTIL SPRING 2004
	-	REWORD FIRST PARAGRAPH FOR CLARIFICATION

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

ATTENTION USERS OF THE MODEL OUTPUT STATISTICS /MOS/ GUIDANCE...

ON TUESDAY...FEBRUARY 24 2004 AT 1200 COORDINATED UNIVERSAL TIME 
/UTC/... THE NWS WILL CHANGE THE FORMAT AND CONTENT OF THE ETA 
MOS GUIDANCE IN THE MET TEXT PRODUCTS /SEE TABLE 1/.  THE FORMAT 
OF THE MESSAGE WILL BE MODIFIED TO BE IDENTICAL TO THAT USED IN 
THE SHORT-RANGE GLOBAL FORECAST SYSTEM /GFS/-BASED MOS GUIDANCE… 
THOUGH GUIDANCE FOR WEATHER ELEMENTS BEYOND 60-HRS IN ADVANCE 
WILL NOT BE AVAILABLE UNTIL LATER IN THE SPRING OF 2004.  

ALSO ON FEBRUARY 24TH:

-	CEILING HEIGHT AND SNOWFALL GUIDANCE WILL BECOME 
	AVAILABLE FOR THE FIRST TIME
-	THE DEFINITION OF CATEGORIES OF TOTAL SKY COVER AND 
	CEILING HEIGHT WILL BE MODIFIED TO DISTINGUISH BETWEEN 
	FEW AND SCATTERED CLOUDS AND BETWEEN CEILINGS OF 1000-
	1900 FT AND 2000-3000 FT.

CHANGES WILL ALSO BE MADE TO THE STATIONS FOR WHICH GUIDANCE IS 
AVAILABLE.  ETA MOS WILL NOW BE PRODUCED FOR STATIONS IN 
ALASKA...HAWAII...AND PUERTO RICO...AS WELL AS 142 NEW STATIONS 
IN THE CONTIGUOUS US.  LISTS OF ALL STATIONS IN THIS CHANGE ARE 
PROVIDED BELOW.

PLEASE NOTE THAT THE IMPLEMENTATION OF THESE CHANGES HAS BEEN 
DELAYED ONE WEEK DUE TO THE DELAY OF THE RELATED IMPLEMENTATION 
DESCRIBED IN TIN 03-48 /AMENDED/.

GUIDANCE FOR VISIBILITY AND OBSTRUCTION TO VISION WILL BECOME 
AVAILABLE IN LATE SPRING 2004… AS WILL GUIDANCE FOR ALL WEATHER 
ELEMENTS OUT TO 72-HRS IN ADVANCE.  A FUTURE TECHNICAL 
IMPLEMENTATION NOTICE WILL BE SENT TO ANNOUNCE THE DETAILS AND 
IMPLEMENTATION DATES OF THOSE CHANGES.  


TABLE 1.  COMMUNICATION IDENTIFIERS FOR THE ETA-BASED MOS TEXT 
PRODUCTS TO WHICH STATIONS WILL BE ADDED ON FEBRUARY 24TH.  THE 
AWIPS IDS ARE METXXX...WHERE THE FINAL XXX DENOTES THE GEOGRAPHIC 
REGION FOR WHICH THE GUIDANCE IS VALID.

	WMO HEADING    AWIPS ID       GEOGRAPHIC REGION

	FOPA40 KWNO	METPA0	      PACIFIC ISLANDS
	FOUS44 KWNO	METNE1	      NORTHEAST CONUS
	FOUS45 KWNO	METSE1	      SOUTHEAST CONUS
	FOUS46 KWNO	METNC1	      NORTH CENTRAL CONUS
	FOUS47 KWNO	METSC1	      SOUTH CENTRAL CONUS
	FOUS48 KWNO	METRM1	      ROCKY MOUNTAIN CONUS
	FOUS49 KWNO	METWC1	      WEST COAST CONUS
	FOAK47 KWNO	METAJK	      SOUTHEAST ALASKA  /JUNEAU/
	FOAK48 KWNO	METAFC	      CENTRAL ALASKA  /ANCHORAGE/
	FOAK49 KWNO	METAFG	      NORTHERN ALASKA /FAIRBANKS/


A LIST OF ALL SITES IN THE TEXT PRODUCTS CAN BE FOUND ONLINE AT 
/USE LOWER CASE LETTERS/:

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

A TECHNICAL DESCRIPTION OF THE NEW BULLETIN FORMAT CAN BE FOUND 
ONLINE AT /USE LOWER CASE LETTERS/:

		HTTP://WWW.NWS.NOAA.GOV/MDL/SYNOP/TPB/ETAMSG2004.HTM

A SAMPLE OF THE MET TEXT BULLETIN EXTENDED TO 72 HOURS CAN BE FOUND 
ONLINE AT /USE LOWER CASE LETTERS/:

        	HTTP://WWW.NWS.NOAA.GOV/MDL/SYNOP/TIN/ETA32.HTM

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

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

IF YOU HAVE ANY QUESTIONS ABOUT THESE CHANGES TO THE MOS GUIDANCE
SYSTEM...PLEASE CONTACT:

		     PAUL DALLAVALLE 
		     MDL/SILVER SPRING MARYLAND 
		     PHONE:   301-713-0023 EXT. 135 
		     E-MAIL:  PAUL.DALLAVALLE@NOAA.GOV 

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

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

$$
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