NOTE: The nws-changes mailing list is no longer active. The list archives are made available for historical reasons.
-------- Original Message --------635 NOUS41 KWBC 241530
PNSWSH TECHNICAL IMPLEMENTATION NOTICE 07-81 NATIONAL WEATHER SERVICE HEADQUARTERS WASHINGTON DC 1130 AM EDT WED OCT 24 2007TO: FAMILY OF SERVICES /FOS/ SUBSCRIBERS...NOAA WEATHER WIRE SERVICE /NWWS/ SUBSCRIBERS...EMERGENCY MANAGERS
WEATHER INFORMATION NETWORK /EMWIN/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: NCEP BEGINS PRODUCING NAEFS PRODUCTS: EFFECTIVE
DECEMBER 4 2007
EFFECTIVE TUESDAY DECEMBER 4 2007...WITH THE 1200 COORDINATED
UNIVERSAL TIME /UTC/ RUN...THE NATIONAL CENTERS FOR ENVIRONMENTAL
PREDICTION /NCEP/ WILL BEGIN PRODUCING PRODUCTS FROM THE NORTH
AMERICAN ENSEMBLE FORECAST /NAEFS/ MODELING SYSTEM. THIS MODELING
SYSTEM USES OUTPUT FROM BOTH THE NCEP GLOBAL ENSEMBLE FORECAST
SYSTEM /GEFS/ AND THE CANADIAN ENSEMBLE FORECAST SYSTEM /CEFS/
AND COMBINES THEM TO PRODUCE NAEFS OUTPUT.
NCEP WILL BEGIN PRODUCING GLOBAL FORECAST SYSTEM /GFS/ BIAS CORRECTED FILES AT 1 DEGREE RESOLUTION...THROUGH 180 HOURS...SIMILAR TO THE CURRENT SET OF NCEP GEFS BIAS CORRECTED DATA SETS. THERE WILL BE 35 VARIABLES AVAILABLE. THESE HIGHER RESOLUTION DATA SETS WILL BE ASSIMILATED INTO THE NCEP GEFS BIAS CORRECTED FORECAST PRODUCTS AND ENHANCE/IMPROVE THE NCEP GEFS NUMERICAL GUIDANCE. THE NEW AND IMPROVED BIAS CORRECTED NCEP GEFS DATA SETS WILL BE AVAILABLE AT 00/06/12/18 UTC. PRODUCTS FOR WEIGHTS AND ANOMALIES WILL ALSO BE PRODUCED. ALL OUTPUT FROM THE GEFS WILL BE AVAILABLE THROUGH 384 HOURS EXCEPT FOR THE HIGH RESOLUTION GFS BIAS CORRECTED FORECASTS. NCEP WILL BEGIN PRODUCING NAEFS PRODUCTS FROM THE COMBINED NCEP GEFS...20 MEMBERS...AND CMC GEFS...20 MEMBERS...FOR 00 AND 12 UTC. THESE PRODUCTS WILL BE PRODUCED ON A 1 DEGREE GLOBAL GRID. PRODUCTS INCLUDE MEANS/SPREADS/MODES AND 10...50...AND 90 PERCENT PROBABILITY FORECASTS. ANOMALY PRODUCTS WILL ALSO BE AVAILABLE. ALL NAEFS OUTPUT WILL BE AVAILABLE THROUGH 384 HOURS.
NCEP WILL BEGIN PRODUCING NDFD GRIDDED OUTPUT OVER THE CONUS DOMAIN...5 KM RESOLUTION ...FROM THE NAEFS AND NCEP GEFS PRODUCT SUITES. THE NCEP GEFS GRIDS WILL BE AVAILABLE AT 00/06/12/18 UTC. THE NAEFS GRIDS WILL BE AVAILABLE ONLY AT 00 AND 12 UTC. THESE PRODUCTS WILL CONTAIN 4 VARIABLES: 1 SURFACE PRESSURE
2 2-METER TEMPERATURE3-4 U/V COMPONENTS OF WIND. ALSO...MEAN/SPREAD/MODE AND 10/50/90 PERCENT PROBABILITY PRODUCTS WILL BE PRODUCED. ALL NDFD OUTPUT WILL BE AVAILABLE THROUGH 384 HOURS.
PARALLEL DATA SETS ARE AVAILABLE FOR EVALUATION ON THE NCEP PUBLIC FTP SERVER AT THE URL BELOW. NCEP ENCOURAGES ALL USERS TO EVALUATE THESE DATA SETS. /USE ALL LOWERCASE LETTERS AND THE CURRENT DATE FOR YYYYMMDD/
FTP://FTPPRD.NCEP.NOAA.GOV/PUB/DATA/NCCF/COM/GENS/PARA/NAEFS.YYYY MMDDTHE ENVIRONMENTAL MODELING CENTER /EMC/ HAS A WEBSITE FOR MORE INFORMATION CONCERNING ALL NCEP MODELING SYSTEMS. /PLEASE USE LOWERCASE LETTERS/
HTTP://WWW.EMC.NCEP.NOAA.GOV
SPECIFIC INFORMATION REGARDING NAEFS CAN BE FOUND AT THE LINK
BELOW: /PLEASE USE LOWERCASE LETTERS/
WWWT.EMC.NCEP.NOAA.GOV/GMB/YZHU/HTML/IMP/200711_IMP.HTML DATA DELIVERY TIMING/VOLUME/CONTENT INFORMATION: NOAAPORT DATA: - NO CHANGE IS EXPECTED WITH NCEP GEFS ENSEMBLE PRODUCTS THAT ARE CURRENTLY DELIVERED TO NOAAPORT CUSTOMERS. - NO CHANGE IS EXPECTED IN THE CONTENT DELIVERY TIME. - NO CHANGES IN DATA VOLUMES ARE EXPECTED. - NO CHANGE IN PDS CONTENT IS EXPECTED. NCEP/NWS FTP SERVERS: - AT THE CURRENT TIME GLOBAL NCEP GEFS LAT/LON GRIB FILES ARE DELIVERED TO BOTH SERVERS. - CURRENT DATA SETS WILL BE NOT BE CHANGED - NO CHANGE IS EXPECTED IN THE CONTENT DELIVERY TIME. - NO SIGNIFICANT CHANGES IN DATA VOLUMES ARE EXPECTED. - NO CHANGE IN PDS CONTENT IS EXPECTED. - NEW NAEFS NATIONAL DIGITAL GRIDDED DATABASE /NDGD/ AND BIAS CORRECTED DATA SETS FOR 00 AND 12 UTC WILL BECOME AVAILABLE ONTHE NCEP FTP SERVER ON THE DAY OF THE IMPLEMENTATION. NCEP ENCOURAGES ALL USERS TO ENSURE THEIR DECODERS ARE FLEXIBLE AND ARE ABLE TO ADEQUATELY HANDLE CHANGES IN CONTENT ORDER...PARAMETER FIELDS CHANGING ORDER...CHANGES IN THE SCALING FACTOR COMPONENT WITHIN THE PDS OF THE GRIB FILES AND ALSO ANY VOLUME CHANGES WHICH MAY BE FORTHCOMING. THESE ELEMENTS MAY CHANGE WITH FUTURE NCEP MODEL IMPLEMENTATIONS. NCEP WILL MAKE EVERY ATTEMPT TO ALERT USERS TO THESE CHANGES PRIOR TO ANY IMPLEMENTATIONS.
IF YOU HAVE ANY QUESTIONS CONCERNING THE SCIENTIFIC CHANGES WITHIN THE MODELING SYSTEM...PLEASE CONTACT:
YUEJIAN ZHU
NCEP/EMC
CAMP SPRINGS MARYLAND
PHONE: 301 763 8000 X7052
EMAIL: YUEJIAN.ZHU@xxxxxxxx
IF YOU HAVE ANY QUESTIONS CONCERNING THE DATAFLOW ASPECTS OF THIS
IMPLEMENTATION...PLEASE SEND AN EMAIL TO THE NCEP/NCO/PMB
DATAFLOW HELPDESK: /USE UPPERCASE LETTERS FOR THE NCEP.PMB.D
PORTION OF EMAIL ADDRESS AND LOWERCASE LETTERS FOR THE REMAINDER/
NCEP.PMB.DATAFLOW@xxxxxxxx THIS AND OTHER NWS TECHNICAL IMPLEMENTATION NOTICES ARE AVAILABLE ONLINE AT /USE LOWER CASE LETTERS/:
HTTP://WWW.NWS.NOAA.GOV/OM/NOTIF.HTM
$$
NNNN
nws-changes archives: