Two Natl Tech Info Msgs

• To: g.hufford(rec), r.livingston(rec), d.smith.dan(rec),
• Subject: Two Natl Tech Info Msgs
• From: M.ROBINSON
• Date: Mon, 7 Jun 1993 08:41:39 -0600

Posted: Fri, Jun  4, 1993   2:00 PM EDT              Msg: HGJD-5736-4418
        g.carter(rec), 
        e.young.nws(rec), l.miller.ucar(rec), t.whittaker(rec)
CC:     j.stackpole(rec), d.haldeman(rec), r.petersen.nmc(rec)
Subj:   Two Natl Tech Info Msgs 
FYI, the following messages were transmitted on AFOS on Thursday
afternoon.
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NATIONAL TECHNICAL INFORMATION MESSAGE    93-18
NATIONAL WEATHER SERVICE HEADQUARTERS
200 PM EDT JUN 03 1993

TO:               ALL NWS OFFICES
                  DOMESTIC DATA SERVICE USERS

FROM:             MARY M. GLACKIN
                  CHIEF, SERVICES DEVELOPMENT BRANCH

SUBJECT:          REMOVAL OF GFUS20-55 BULLETINS       

(INFORMATION FOR THIS ANNOUNCEMENT HAS BEEN PROVIDED BY MARY
NEWTON OF THE OFFICE OF METEOROLOGY)

ON TUESDAY, JUNE 08, 1993, AT 1200 UTC, THE NATIONAL WEATHER
SERVICE WILL CEASE GENERATION OF THE GFUS20-55 BULLETINS.  THE
GFUS BULLETINS ARE ASCII CODED FORECAST OF WIND SPEED AND
DIRECTION AND TEMPERATURE FOR THE LIMITED-AREA FINE-MESH MODEL
(LFM) GRID POINTS ON THE MARSDEN SQUARE GRID.  THESE PRODUCTS ARE
NO LONGER REQUIRED BY THE FEDERAL AVIATION ADMINISTRATION (FAA),
THE INTENDED USERS OF THE BULLETINS.

THIS CHANGE IS BEING MADE AS PART OF THE PHASEOUT OF THE LFM
MODEL AND THE IMPLEMENTATION OF THE ETA MODEL ALSO SET FOR
1200 UTC, JUNE 08, 1993.    

QUESTIONS REGARDING THIS CHANGE OR QUESTIONS ABOUT THE PHASE-OUT
OF THE LFM MAY BE DIRECTED TO MARY NEWTON OR CHRIS ALEX AT
(301-713-0462).      

END
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NATIONAL TECHNICAL INFORMATION MESSAGE    93-19
NATIONAL WEATHER SERVICE HEADQUARTERS
200 PM EDT JUN 03 1993

TO:               ALL NWS OFFICES
                  DOMESTIC DATA SERVICE USERS

FROM:             MARY M. GLACKIN
                  CHIEF, SERVICES DEVELOPMENT BRANCH

SUBJECT:          ETA MODEL IMPLEMENTATION/PHASE-OUT OF THE       
                  LIMITED-AREA FINE MESH (LFM)      

REFERENCE:        W/OM23:MCR LETTER DATED MAY 11, 1993


EFFECTIVE 1200 UTC, ON JUNE 8, 1993, AS PREVIOUSLY ADVERTISED, THE
NWS WILL REPLACE THE LIMITED-AREA FINE MESH (LFM) MODEL WITH A NEW
WEATHER PREDICTION MODEL CALLED THE EARLY ETA MODEL.  THIS VERSION
OF THE ETA MODEL, WHICH CONSISTS OF 38 LAYERS IN THE VERTICAL AND
AN 80-KM HORIZONTAL GRID, WILL PROVIDE AN IMPROVED EARLY LOOK AT
THE SYNOPTIC SCALE FORECAST COMPARED TO THE LFM.

WITH THE IMPLEMENTATION OF THE ETA MODEL, MOST PRODUCTS THAT ARE
CURRENTLY GENERATED FROM THE LFM WILL BE DERIVED FROM EITHER THE
ETA MODEL OR THE NESTED GRID MODEL (NGM).  A TECHNICAL PACKAGE
IDENTIFYING EVERY LFM-BASED PRODUCT, AND ITS DISPOSITION WITH THE
ETA IMPLEMENTATION, WAS MAILED TO NWS EMPLOYEES AND NUMEROUS
EXTERNAL USERS.  PLEASE REFER TO THIS PACKAGE (SEE REFERENCE) FOR
DETAILS ON AFFECTED LFM-BASED PRODUCTS.  

IF YOU NEED INFORMATION ON THE ETA MODEL, CONTACT GEOFF DIMEGO AT
NMC AT 301-763-8056, OR WRITE TO HIM AT:

                NATIONAL METEOROLOGICAL CENTER
                5200 AUTH ROAD
                CAMP SPRINGS, MD  20746

IF YOU NEED INFORMATION ON THE ETA MODEL IMPLEMENTATION OR THE
REFERENCE, PLEASE CALL MARY NEWTON OR CHRIS ALEX ON MY STAFF IN THE
OFFICE OF METEOROLOGY AT 301-713-0462.  WRITTEN INQUIRIES MAY BE
MAILED TO THE FOLLOWING ADDRESS:

                NOAA/NATIONAL WEATHER SERVICE
                OFFICE OF METEOROLOGY, W/OM23
                1325 EAST WEST HIGHWAY
                SSMC2, RM 13442
                SILVER SPRING, MD  20910

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