20000322: Eta changes-ADMIN NOTICE NOUS40 KWBC (fwd)

• To: nws-changes@xxxxxxxxxxxxxxxx
• Subject: 20000322: Eta changes-ADMIN NOTICE NOUS40 KWBC (fwd)
• From: Linda Miller <lmiller@xxxxxxxxxxxxxxxx>
• Date: Wed, 22 Mar 2000 13:41:08 -0700

700 
NOUS40 KWBC 222027
FOS/NOAAPORT NOTICE NO. 1628     MARCH 22... 2000

ATTENTION    FAMILY OF SERVICES SUBSCRIBERS
              NOAAPORT USERS

SUBJECT      CHANGES TO 4/DAY RUNS OF THE MESO ETA

EFFECTIVE DATE   MARCH 29... 2000

THE ETA MODEL GRIDDED OUTPUT SENT TO THE SBN/NOAAPORT AND
NCEP/OSO SERVERS WILL CHANGE THEIR PDS OCTET 6 VALUES.

CHANGES ARE AS FOLLOWS
                               FROM      TO
EARLY 80KM AWIPS GRID 211     89        84
MESO 40KM AWIPS GRID 212      85        84
MESO 20KM AWIPS GRID 215      85        84

THE ABOVE GRIDS WILL NOW HAVE IDENTICAL PDS OCTET 6 VALUES
AS THE 32KM / 45 LAYER VERSION OF THE MESO ETA MODEL.

THERE IS ONE EXCEPTION... THE ICWF GRID 212 OUTPUT AT 00Z AND
THE 12Z WILL RETAIN USE OF 89.

ALL ETA GRIDS WILL NOW HAVE TIME STEPS THROUGH 60 HOURS.

ADDITIONAL INFORMATION HAS BEEN PROVIDED FOR YOU AT THE
FOLLOWING URL ADDRESSES

A CHANGE PACKAGE IS GOING INTO THE MESO ETA RUNS.
IT IS DESCRIBED IN THE NOTICE PUBLISHED AT

HTTP//WWW.NCEP.NOAA.GOV/NCO/PMB/ANNOUNCEMENTS/ETA60HRS.
HTML

THE WHOLE PACKAGE OF CHANGES IS DESCRIBED IN THE DRAFT TPB AT

FTP//FTP.NCEP.NOAA.GOV/PUB/EMC/WD20ER/ETATPB/ETA60TPB.HTM

THIS CHANGE PACKAGE WILL BE IMPLEMENTED ON 29 MARCH 2000 AND
WILL INCLUDE THE FOLLOWING

1/  THE 60 HOUR EXTENSION FOR THE 00Z AND 12Z RUNS
     /THE 48 HOUR EXTENSION FOR THE 06Z AND 18Z RUNS WAS DONE
     IN NOV./.

2/  AWIPS SBN DISTRIBUTION OF GRIDS 212 AND 215 OUT TO 60 HR
     FROM 00Z AND 12Z AND OUT TO 48 HOURS FROM 06Z AND 18Z RUNS.

3/ CONVECTIVE SCHEME CHANGES TO

        A/ REDUCE EXCESS PRECIP BIAS ALONG SE AND MID ATLANTIC
           COAST

        B/ REDUCE DEFICIT PRECIP BIAS OVER ELEVATED WEST

4/ ADD TO SBN AN ALTERNATE MEAN SEA-LEVEL P FROM SHUELL
    REDUCTION

5/ COMPUTE STORM MOTION USING BUNKERS ET AL. TECHNIQUE

6/ INCLUDE DRIFT OF RADIOSONDE BALLOON IN LOCATING RAOB
    DATA LEVELS IN THE 3DVAR/EDAS

7/ ADD A QUALITY CONTROL SCHEME FOR VAD WINDS FROM 88D
    RADARS ALLOWING THEM TO BE TURNED BACK ON IN THE
    3DVAR/EDAS

IF YOU HAVE QUESTIONS CONCERNING THIS CHANGE... PLEASE CONTACT

GEOFF DIMEGO
301.763.8000 X 7221
GEOFF.DIMEGO/AT SYMBOL/NOAA.GOV /LOWER CASE/
END
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