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TECHNICAL IMPLEMENTATION NOTICE 08-34
NATIONAL WEATHER SERVICE HEADQUARTERS WASHINGTON DC
1010 AM EDT MON APR 14 2008

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

FROM:       THERESE Z. PIERCE
            MARINE AND COASTAL SERVICES BRANCH CHIEF

SUBJECT:    PROBABILISTIC TROPICAL CYCLONE SURFACE WIND SPEED 
            ELEMENTS FOR THE NORTH PACIFIC OCEAN TO BE ADDED TO 
            THE NATIONAL DIGITAL FORECAST DATABASE /NDFD/ ON 
            MAY 15 2008 AT 1200 UTC 

EFFECTIVE THURSDAY MAY 15 2008 WITH THE 1200 COORDINATED 
UNIVERSAL TIME /UTC/ FORECASTS...THE PROBABILISTIC TROPICAL 
CYCLONE SURFACE WIND SPEED ELEMENTS WILL BE ADDED IN EXPERIMENTAL 
STATUS TO NDFD FOR A NEW NDFD DOMAIN: THE NORTH PACIFIC OCEAN. 
THESE ELEMENTS WILL BE AVAILABLE THROUGH 120 HOURS AT 6 HOURLY 
INTERVALS AT 10 KILOMETER SPATIAL RESOLUTION. THESE FORECASTS ARE 
PROVIDED FOR THREE WIND SPEED THRESHOLDS: 34...50...AND 64 KNOTS.  
TWO TYPES OF WIND SPEED PROBABILITIES ARE PROVIDED: CUMULATIVE 
AND INCREMENTAL.

USERS OF NDFD XML VIA WEB SERVICE AND/OR NDFD GML VIA WEB FEATURE 
SERVICE WILL BE ABLE TO RECEIVE THIS DATA ONE WEEK LATER ON  
MAY 22 2008 AT 1200 UTC.

DEFINITIONS OF THESE PROBABILITIES ARE AVAILABLE ON THE NATIONAL 
HURRICANE CENTER WEB PAGE AT /USE LOWER CASE LETTERS/:

  HTTP://WWW.NHC.NOAA.GOV/ABOUTNHCPROBS.SHTML

AND IN THE LIST OF NDFD ELEMENT DEFINITIONS AT /USE LOWER CASE 
LETTERS/:

  HTTP://WWW.NWS.NOAA.GOV/NDFD/DEFINITIONS.HTM

PROBABILISTIC TROPICAL CYCLONE SURFACE WIND SPEED ELEMENTS ARE 
ALREADY AVAILABLE IN OPERATIONAL STATUS FOR THE COTERMINOUS 
UNITED STATES /CONUS/...THE 16 PRE-DEFINED NDFD CONUS SUBSECTORS 
AND THE ADJACENT COASTAL WATERS...AT 5 KILOMETER SPATIAL 
RESOLUTION.

THIS CHANGE EXPANDS THE NDFD AREAL COVERAGE OF THE PROBABALISTIC 
TROPICAL CYCLONE SURFACE WIND SPEED ELEMENTS TO ALL OF THE 
EASTERN...CENTRAL...AND WESTERN PACIFIC OCEAN...NORTH OF THE 
EQUATOR...CORRESPONDING TO AWIPS GRID NUMBER 204.  TO SEE AN 
IMAGE OF THE NORTH PACIFIC OCEAN DOMAIN...REFER TO /USE LOWER 
CASE LETTERS/:
         
  HTTP://WWW.NCO.NCEP.NOAA.GOV/PMB/DOCS/ON388/GRIDS/GRID204.GIF

THIS CHANGE PRIMARILY AFFECTS USERS WHO PULL THESE ELEMENTS IN 
GRIDDED BINARY /GRIB2/ FORMAT FROM THE NWS HTTP OR FTP SERVER VIA 
THE INTERNET OR SUBSCRIBE TO THE FAMILY OF SERVICES SERVER ACCESS 
SERVICE.

ADDITIONAL DETAILS ABOUT THIS IMPLEMENTATION...INCLUDING 
SPECIFIC INFORMATION FOR HTTP AND FTP USERS...ARE AVAILABLE AT 
/USE LOWER CASE LETTERS/:

  HTTP://WWW.WEATHER.GOV/NDFD/TPC_EXPER_PACIFIC_NDFD_IMPLEM.HTM

IF MAY 15 2008 IS A CRITICAL WEATHER DAY...THIS IMPLEMENTATION 
MAY BE POSTPONED. IN THAT CASE USERS WILL BE NOTIFIED VIA A 
TECHNICAL IMPLEMENTATION NOTICE AS FAR IN ADVANCE AS POSSIBLE.

DETAILED INFORMATION ON OPTIONS FOR ACCESSING AND USING THE NDFD 
IS AVAILABLE AT /USER LOWER CASE LETTERS/:

  HTTP://NDFD.WEATHER.GOV/TECHNICAL.HTM

MORE DETAILS REGARDING THESE ELEMENTS WILL BE PROVIDED IN A 
PRODUCT DESCRIPTION DOCUMENT /PDD/ WHICH WILL BE ADDED TO THE 
NWS CATALOG OF EXPERIMENTAL PRODUCTS BEFORE THE IMPLEMENTATION 
DATE. THE CATALOG OF EXPERIMENTAL PRODUCTS IS ONLINE AT /USE 
LOWER CASE LETTERS/:

  HTTP://PRODUCTS.WEATHER.GOV/VIEWLISTE.PHP

COMMENTS AND FEEDBACK ON THE EXPERIMENTAL PROBABILISTIC TROPICAL 
CYCLONE SURFACE WIND SPEED ELEMENTS FOR THE NORTH PACIFIC OCEAN 
WILL BE ACCEPTED THROUGH NOVEMBER 30 2008.  LINKS TO ONLINE 
SURVEYS FOR NDFD CUSTOMERS ARE /USE LOWER CASE LETTERS/:

  GRIB2 USERS: 
  HTTP://WWW.WEATHER.GOV/SURVEY/NWS-SURVEY.PHP?CODE=NDFD-GRIDS

  USERS OF XML SOAP SERVICE:
  HTTP://WWW.WEATHER.GOV/SURVEY/NWS-SURVEY.PHP?CODE=XMLSOAP

IN LINK BELOW USE LOWERCASE EXCEPT OGC

  GML USERS VIA WEB FEATURE SERVICE:
  HTTP://WWW.WEATHER.GOV/FORECASTS/XML/OGC_SERVICES

  NDFD ONLINE GRAPHICS:
  HTTP://WWW.WEATHER.GOV/SURVEY/NWS-SURVEY.PHP?CODE=GFP

THESE NEW ELEMENTS FOR THE NORTH PACIFIC OCEAN WILL REMAIN IN 
EXPERIMENTAL STATUS UNTIL ALL FEEDBACK RECEIVED BY THE CLOSE OF 
THE COMMENT PERIOD HAS BEEN ASSESSED AND A TECHNICAL ANALYSIS IS 
COMPLETED.  AT THAT TIME NWS WILL DETERMINE WHETHER TO TRANSITION 
THESE EXPERIMENTAL ELEMENTS TO OPERATIONAL STATUS... DISCONTINUE 
THEM...OR REVISE AND RETAIN THEM AS EXPERIMENTAL ELEMENTS.

IF YOU HAVE QUESTIONS REGARDING THIS NOTICE...PLEASE CONTACT:

     SCOTT KISER
     NATIONAL WEATHER SERVICE
     MARINE AND COASTAL SERVICES BRANCH
     1325 EAST WEST HIGHWAY
     SILVER SPRING MARYLAND 20910
     EMAIL:  SCOTT.KISER@NOAA.GOV

FOR TECHNICAL QUESTIONS REGARDING 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
     E-MAIL:  DAVID.RUTH@NOAA.GOV

TECHNICAL IMPLEMENTATION NOTICES SPECIFICALLY RELATED TO THE 
NDFD ARE AVAILABLE ONLINE AT /USE LOWER CASE LETTERS/:

  HTTP://WWW.WEATHER.GOV/NDFD/TINS.HTM

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

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

$$
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