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-------- Original Message --------207 NOUS41 KWBC 191906
PNSWSH TECHNICAL IMPLEMENTATION NOTICE 06-51 NATIONAL WEATHER SERVICE HEADQUARTERS WASHINGTON DC 308 PM EDT WED JUL 19 2006TO: FAMILY OF SERVICES /FOS/ SUBSCRIBERS...NOAA WEATHER WIRE SERVICE /NWWS/ SUBSCRIBERS... EMERGENCY MANAGERS WEATHER INFORMATION NETWORK /EMWIN/ SUBSCRIBERS...NOAAPORT SUBSCRIBERS... OTHER NATIONAL WEATHER SERVICE /NWS/ CUSTOMERS AND PARTNERS...AND NWS EMPLOYEES
FROM: GLENN AUSTIN
DIGITAL SERVICES TRANSITION MANAGER
OFFICE OF CLIMATE WATER AND WEATHER SERVICES
SUBJECT: CHANGE IN TIME THE NWS NATIONAL DIGITAL FORECAST
DATABASE /NDFD/ IS EXTENDED BY 24 HOURS: EFFECTIVE
NOVEMBER 28 2006
NDFD IS DESIGNED TO BE FREQUENTLY REFRESHED. FORECAST ELEMENTS ARE GENERATED AND REVISED AT THE LOCAL WEATHER FORECAST OFFICES AND NATIONAL CENTERS. THESE FORECASTS ARE PROCESSED CENTRALLY AND MADE AVAILABLE IN SEVERAL FORMATS VIA NDFD. REVISED FORECASTS FOR UP TO SEVEN DAYS ARE CURRENTLY MADE AVAILABLE NEAR THE TOP OF EACH HOUR. THE FORECAST DATABASE IS CURRENTLY EXTENDED BY 24 HOURS ONCE A DAY AT 1800 COORDINATED UNIVERSAL TIME /UTC/.
BEGINNING NOVEMBER 28 2006...THE TIME THE NATIONAL DIGITAL FORECAST DATABASE IS EXTENDED BY 24 HOURS WILL CHANGE FROM 1800 UTC TO 2200 UTC. THIS CHANGE WILL ALLOW NWS FORECASTERS TO ASSIMILATE THE MOST RECENT FORECAST MODELS AND NATIONAL CENTERS GUIDANCE AND TO COLLABORATE WITH OTHER NWS OFFICES. THE RESULT WILL BE MORE ACCURATE AND MORE COHERENT FORECASTS ACROSS THE COUNTRY. NWS IS MAKING THIS CHANGE AS PART OF OUR ONGOING SERVICE IMPROVEMENT EFFORTS.
THE CHANGE ON NOVEMBER 28 2006 APPLIES TO ALL ELEMENTS IN THE NDFD - OPERATIONAL AND EXPERIMENTAL - AND ALL DOMAINS /THE CONTIGUOUS U.S. /CONUS/...THE 16 PRE-DEFINED CONUS SUBSECTORS... HAWAII...GUAM...AND ALASKA/.
THIS CHANGE AFFECTS USERS WHO PULL NDFD ELEMENT FILES IN GRIDDED BINARY /GRIB2/ FORMAT FROM THE NWS FILE TRANSFER PROTOCOL /FTP/ SERVER...EITHER VIA THE INTERNET OR VIA THE FAMILY OF SERVICES SERVER ACCESS SERVICE. THE CHANGE ALSO AFFECTS USERS WHO ACCESS NDFD IN EXTENSIBLE MARKUP LANGUAGE /XML/ VIA WEB SERVICE. THIS CHANGE DOES NOT AFFECT USERS OF NDFD WEB GRAPHICS. THERE ARE NO NEW WMO HEADINGS ASSOCIATED WITH THIS CHANGE. HOWEVER USERS THAT KEY ON WMO HEADINGS WITHIN THE GRIB2 ELEMENT FILES MUST PROPERLY IDENTIFY HEADINGS ACCORDING TO FORECAST DAY. FOR EXAMPLE GRIDS DESIGNATED AS DAY 2 FORECASTS IN THE WMO HEADING WILL NOT CHANGE TO A DAY 1 DESIGNATION UNTIL 2200 UTC EACH DAY ON AND AFTER NOVEMBER 28 2006.
IF NOVEMBER 28 2006 IS A CRITICAL WEATHER DAY...THIS IMPLEMENTATION MAY BE POSTPONED. USERS WILL BE NOTIFIED OF THAT DECISION AS FAR IN ADVANCE AS POSSIBLE.
RELATIONSHIP TO CHANGES SCHEDULED FOR SEPTEMBER 6 2006:EFFECTIVE SEPTEMBER 6 2006...NDFD FORECASTS FOR DAYS 1 THROUGH 3 WILL BE MADE AVAILABLE HOURLY SHORTLY AFTER THE TOP OF EACH HOUR. FORECASTS FOR DAYS 4 THROUGH 7 WILL BE POSTED ABOUT 15 MINUTES BEFORE THE HOUR AT 4 TIMES PER DAY...AT 0000 UTC...0600 UTC...1200 UTC...AND 1800 UTC. STARTING ON NOVEMBER 28 2006...A FIFTH UPDATE TIME FOR DAYS 4 THROUGH 7 WILL BE ADDED AT 2200 UTC. FOR MORE INFORMATION ABOUT THIS CHANGE EFFECTIVE SEPTEMBER 6 2006... SEE TECHNICAL IMPLEMENTATION NOTICES /TINS/ 06-39 AND 06-30/.
USERS ARE ENCOURAGED TO PROVIDE FEEDBACK BY USING THE BRIEF SURVEY AND COMMENT FORM AVAILABLE ONLINE AT /USE LOWER CASE LETTERS/: HTTP://WWW.WEATHER.GOV/SURVEY/NWS-SURVEY.PHP?CODE=TCSWP
FOR GENERAL QUESTIONS REGARDING THE NDFD...PLEASE EMAIL:
NWS.NDFD@xxxxxxxx
FOR ADDITIONAL INFORMATION ON NDFD...REFER TO THE FOLLOWING WEB
PAGES /USE LOWER CASE LETTERS FOR ALL URLS BELOW/:
CONTENT OF AND INSTRUCTIONS FOR ACCESSING THE NDFD IN EITHER GRIB2 FORMAT OR XML:
HTTP://WWW.NWS.NOAA.GOV/NDFD/TECHNICAL.HTM
HTTP://WEATHER.GOV/XML/
FOR NDFD GRAPHICS:
HTTP://WEATHER.GOV/FORECASTS/GRAPHICAL/SECTORS/
OPERATIONAL STATUS OF ALL NWS NDFD ELEMENTS:HTTP://WWW.NWS.NOAA.GOV/NDFD/RESOURCES/OPER_STATUS_TABLE.PDF
IF YOU HAVE QUESTIONS REGARDING THIS NOTICE...PLEASE CONTACT:
CHRIS ALEX
DIGITAL SERVICES
NATIONAL WEATHER SERVICE
OFFICE OF CLIMATE WATER AND WEATHER SERVICES
1325 EAST WEST HIGHWAY
SILVER SPRING MARYLAND 20910
EMAIL: CHRISTINE.ALEX@xxxxxxxx
IF YOU HAVE TECHNICAL QUESTIONS REGARDING THE NDFD DATA...PLEASE
CONTACT:
DAVID RUTH
CHIEF...MESOSCALE PREDICTION BRANCH
NATIONAL WEATHER SERVICE
OFFICE OF SCIENCE AND TECHNOLOGY
1325 EAST WEST HIGHWAY
SILVER SPRING MARYLAND 20910
EMAIL: DAVID.RUTH@xxxxxxxx
THIS AND ALL OTHER NWS TECHNICAL IMPLEMENTATION NOTICES ARE
POSTED AT /USE LOWER CASE LETTERS/:
HTTP://WWW.NWS.NOAA.GOV/OM/NOTIF.HTM $$ -- Linda Miller - lmiller@xxxxxxxxxxxxxxxx Community Services, Unidata University Corporation for Atmospheric Research P.O. Box 3000 Boulder, CO 80307-3000303-497-8646 fax: 303-497-8690
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