All,
You are receiving this message because you have been identified as a
user of NCEP model data. The NCEP NAEFS modeling system will be
upgraded on Tue Dec 4 2007. Please see the NWS TIN (Technical
Information Notice) below if you are interested in using the output
from the NAEFS modeling system.
Please see the NCO PMB model changes web site for more information
concerning NCEP model changes.
http://www.nco.ncep.noaa.gov/pmb/changes/
Thanks,
Joey Carr
EFFECTIVE TUE DEC 4 2007...WITH THE 1200 COORDINATED UNIVERSAL TIME /UTC/ RUN...NCEP WILL BEGIN PRODUCING
PRODUCTS FROM THE NAEFS MODELING SYSTEM. THIS MODELING SYSTEM UTILIZES
OUTPUT FROM BOTH THE NCEP GLOBAL ENSEMBLE FORECAST SYSTEM /GEFS/ AND THE CANADIAN ENSEMBLE FORECAST
SYSTEM /CEFS/ AND COMBINES THEM TO PRODUCE NAEFS
OUTPUT.
EXPECTED DATA DELIVERY TIMING/VOLUME/CONTENT CHANGES:
NOAAPORT DATA:
- THE NCEP GEFS ENSEMBLE PRODUCTS WHICH ARE DELIVERED TO NOAAPORT
CUSTOMERS ARE NOT EXPECTED TO CHANGE.
- NO CHANGE IS EXPECTED IN THE CONTENT DELIVERY TIME.
- NO SIGNIFICANT 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 ON
THE NCEP FTP SERVER.
DISCLAIMER: NCEP WOULD ENCOURAGE 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.
MODELING SYSTEM CHANGES:
NEW PRODUCTS PRODUCED AT NCEP:
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 NUMBERICAL
GUIDANCE. THE NEW AND IMPROVED BIAS CORRECTED NCEP GEFS DATA SETS WILL
BE AVAILABLE AT 00 06 12 AND 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.
NAEFS FILES PRODUCED FROM THE COMBINED NCEP GEFS...20 MEMBERS...AND CMC
GEFS...20 MEMBERS...FOR 00 AND 12 UTC. THESE 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.
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 AND 18 UTC. THE NAEFS GRIDS WILL BE AVAILABLE
ONLY AT 00 AND 12 UTC. THESE PRODUCTS WILL CONTAIN 4 VARIABLES: SURFACE
PRESSURE...2-METER TEMPERATURE...U/V WINDS.
ALSO...MEAN...SPREAD...MODE...10 50 AND 90 PERCENT PROBABILITY PRODUCTS
WILL BE PRODUCED. ALL NDFD OUTPUT WILL BE PRODUCED THROUGH 384 HOURS.
PARALLEL DATA SETS WILL BECOME AVAILABLE FOR EVALUATION ON WED OCT 24
2007 ON THE NCEP PUBLIC FTP SERVER AT THE ADDRESS BELOW. NCEP
ENCOURAGES ALL USERS TO EVALUATE THESE DATA SETS TO ENSURE THAT THEIR
SYSTEMS ARE PREPARED FOR THE UPCOMING CHANGE.
/PLEASE USE
ALL LOWERCASE LETTERS/
FTP://FTPPRD.NCEP.NOAA.GOV/PUB/DATA/NCCF/COM/NAEFS/PARA
THE ENVIRONMENTAL MODELING CENTER /EMC/
HAS A PUBLICLY AVAILABLE WEB SITE WHICH CAN PROVIDE USERS MORE
INFORMATION CONCERNING ALL NCEP MODELING SYSTEMS. /PLEASE USE
LOWERCASE LETTERS/
HTTP://WWW.EMC.NCEP.NOAA.GOV
SPECIFIC INFORMATION REGARDING THE NAEFS CAN BE FOUND AT THE LINK
BELOW: /PLEASE
USE LOWERCASE LETTERS/
HTTP://WWWT.EMC.NCEP.NOAA.GOV/GMB/YZHU/HTML/IMP/200711_IMP.HTML
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@NOAA.GOV
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@NOAA.GOV
THIS AND OTHER NWS TECHNICAL IMPLEMENTATION NOTICES ARE AVAILABLE
ONLINE AT /USE
LOWER CASE LETTERS/:
HTTP://WWW.NWS.NOAA.GOV/OM/NOTIF.HTM