NOUS41 KWBC 161705
PNSWSH

TECHNICAL IMPLEMENTATION NOTICE 08-06
NATIONAL WEATHER SERVICE HEADQUARTERS WASHINGTON DC
1205 EST WED JAN 16 2008

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

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

SUBJECT:  STREAMLINED DATA PATHWAY FOR AIR QUALITY FORECAST  
          GUIDANCE PRODUCTS: EFFECTIVE APRIL 1 2008

EFFECTIVE TUESDAY APRIL 1 2008...WITH THE 1200 COORDINATED 
UNIVERSAL TIME /UTC/ RUN...THE NATIONAL CENTERS FOR ENVIRONMENTAL 
PREDICTION /NCEP/ WILL STREAMLINE THE DISSEMINATION OF HOURLY 
AIR QUALITY /AQ/ FORECAST GUIDANCE PRODUCTS WITH AGGREGATED 
SUPER-HEADED PRODUCTS.

DATAFLOW CHANGES:

NCEP WILL STOP SENDING INDIVIDUAL HOURLY AQ GRID FILES FOR OZONE 
AND SMOKE TO THE TELECOMMUNICATIONS OPERATIONS CENTER /TOC/...NOW 
POSTED IN THE DIRECTORIES BELOW /USE LOWER CASE LETTERS EXCEPT 
FOR SL...ST...MT...AND CY/:

SL.US008001/ST.OPNL/MT.CMAQ_CY.06/
SL.US008001/ST.OPNL/MT.CMAQ_CY.12/

DIRECTORY NAME CHANGES:

A SECOND COMPONENT OF THIS CHANGE IS TO REVISE THE AQ FORECAST 
GUIDANCE FILE PATH ON THE NWS FTP SERVER TO THE FOLLOWING 
ADDRESSES BELOW /USE ALL LOWER CASE LETTERS EXCEPT FOR 
SL...ST...DF...DC...GT...AND AR/:

SL.US008001/ST.EXPR/DF.GR2/DC.NDGD/GT.AQ/AR.CONUS/DS.OZONE01.BIN
SL.US008001/ST.EXPR/DF.GR2/DC.NDGD/GT.AQ/AR.CONUS/DS.OZONE08.BIN
SL.US008001/ST.OPNL/DF.GR2/DC.NDGD/GT.AQ/AR.CONUS/DS.OZONE01.BIN
SL.US008001/ST.OPNL/DF.GR2/DC.NDGD/GT.AQ/AR.CONUS/DS.OZONE08.BIN
SL.US008001/ST.EXPR/DF.GR2/DC.NDGD/GT.AQ/AR.CONUS/DS.SMOKEC01.BIN
SL.US008001/ST.EXPR/DF.GR2/DC.NDGD/GT.AQ/AR.CONUS/DS.SMOKES01.BIN
SL.US008001/ST.OPNL/DF.GR2/DC.NDGD/GT.AQ/AR.CONUS/DS.SMOKEC01.BIN
SL.US008001/ST.OPNL/DF.GR2/DC.NDGD/GT.AQ/AR.CONUS/DS.SMOKES01.BIN

IN THE NEW PATH...GT...STANDS FOR GUIDANCE TYPE.

REASON FOR CHANGE:

FOR THE DATA PATH CHANGE: THE CURRENT DATA PATH INCLUDES 
EXTRANEOUS STEPS THAT ADD TO THE DELIVERY TIME...DELAYING 
PRODUCTS PAST THE REQUIRED TIMES OF AVAILABILITY. ALSO BY 
STREAMLINING THE DATA PATH...POTENTIAL LATENCIES AND POINTS-OF-
FAILURE THAT CAN PREVENT PRODUCT DELIVERY WILL BE ELIMINATED.

FOR THE DIRECTORY NAME CHANGES...INTRODUCTION OF...GT...ALIGNS AQ 
PRODUCTS WITH OTHER PRODUCTS IN THE NATIONAL DIGITAL GUIDANCE 
DATABASE /NDGD/. THIS NEW PATH WILL ALLOW A CLEARER DISTINCTION 
BETWEEN AIR QUALITY...GRIDDED MOS PRODUCTS...REAL-TIME MESOSCALE 
ANALYSIS PRODUCTS...AND PROBABILISTIC SLOSH PRODUCTS IN THE NDGD.

FOR QUESTIONS CONCERNING AIR QUALITY PRODUCTS... PLEASE CONTACT: 

     PAULA DAVIDSON
     OFFICE OF SCIENCE AND TECHNOLOGY
     SILVER SPRING MARYLAND
     PHONE: 301 713 3557 X171
     EMAIL: PAULA.DAVIDSON@NOAA.GOV

FOR QUESTIONS CONCERNING THE DATAFLOW ASPECTS OF THIS 
IMPLEMENTATION...EMAIL THE NCEP/NCO/PMB DATAFLOW HELPDESK: 

     NCEP.PMB.DATAFLOW@NOAA.GOV 

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

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

$$
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