-------- Original Message --------
285
NOUS41 KWBC 041932
PNSWSH
TECHNICAL IMPLEMENTATION NOTICE 09-20
NATIONAL WEATHER SERVICE HEADQUARTERS WASHINGTON DC
332 PM EDT THU JUN 4 2009
TO: SUBSCRIBERS:
-FAMILY OF SERVICES
-NOAA WEATHER WIRE SERVICE
-EMERGENCY MANAGERS WEATHER INFORMATION NETWORK
-NOAAPORT
OTHER NWS PARTNERS...AND NWS EMPLOYEES
FROM: CARVEN SCOTT
CHIEF...ENVIRONMENTAL AND SCIENTIFIC SERVICES DIVISION
ALASKA REGION HEADQUARTERS
SUBJECT: NINE ADDITIONAL ALASKA GRIDDED FORECAST ELEMENTS
TO BE ADDED TO THE NATIONAL DIGITAL FORECAST DATABASE
/NDFD/ IN EXPERIMENTAL STATUS EFFECTIVE JULY 8 2009
EFFECTIVE JULY 8 2009 AT 1400 COORDINATED UNIVERSAL TIME /UTC/
NINE ALASKA GRIDDED FORECAST ELEMENTS WILL BE ADDED TO NDFD IN
EXPERIMENTAL STATUS:
TABLE 1: NEW EXPERIMENTAL ALASKA GRIDDED FORECAST ELEMENTS
TEMPERATURE DEW POINT
WEATHER SKY COVER
WIND GUST RELATIVE HUMIDITY
APPARENT TEMPERATURE QUANTITATIVE PRECIPITATION FORECAST
SNOW AMOUNT
THESE ELEMENTS FOR ALASKA ARE IN ADDITION TO THE SIX ALASKA
GRIDDED FORECAST ELEMENTS:
MAXIMUM TEMPERATURE
MINIMUM TEMPERATURE
12-HR PROBABILITY OF PRECIPITATION
WIND SPEED
WIND DIRECTION
SIGNIFICANT WAVE HEIGHT
NWS BEGAN ISSUEING THE SIX ELEMENTS ABOVE EXPERIMENTALLY ON
SEPTEMBER 6 2006. THE ALASKA HAZARD GRID HAS BEEN ISSUED
EXPERIMENTALLY SINCE JULY 8 2008.
THE TECHNICAL IMPLEMENTATION NOTICE /TIN/ ANNOUNCING THE
ORIGINAL SIX EXPERIMENTAL ALASKA GRIDDED ELEMENTS IS AVAILABLE
ONLINE AT /USE LOWERCASE/:
WWW.WEATHER.GOV/OS/NOTIFICATION/OLD/TIN06-54NDFD_ALASKA.TXT
ALL EXPERIMENTAL GRIDDED FORECAST ELEMENTS FOR ALASKA ARE
AVAILABLE AT SIX KILOMETER SPATIAL RESOLUTION. ALL OTHER
FORECASTS IN NDFD FOR OTHER DOMAINS ARE AVAILABLE AT FIVE
KILOMETER SPATIAL RESOLUTION.
USERS WHO PULL NDFD ELEMENTS IN GRIDDED BINARY 2 /GRIB2/ FORMAT
FROM THE NWS ANONYMOUS FILE TRANSFER PROTOCOL /FTP/ SERVER...
EITHER VIA THE INTERNET OR VIA THE FAMILY OF SERVICES SERVER
ACCESS SERVICE...MAY NEED TO UPDATE THEIR PROCEDURES AND SCRIPTS
TO ACCESS THESE FORECASTS FOR ALASKA. DETAILED INFORMATION FOR
FTP AND OTHER USERS REGARDING THIS CHANGE IS AVAILABLE ONLINE AT
/USE LOWERCASE/:
HTTP://WWW.WEATHER.GOV/NDFD/TECHNICAL.HTM
MORE DETAILS REGARDING THESE ELEMENTS WILL BE PROVIDED IN A
PRODUCT DESCRIPTION DOCUMENT /PDD/ BEFORE THE BEGINNING OF THE
EXPERIMENTAL PERIOD. AT THAT TIME THE PDD WILL BE FOUND ONLINE
AT /USE LOWERCASE/:
HTTP://PRODUCTS.WEATHER.GOV/VIEWLISTE.PHP
IF JULY 8 2009 IS A CRITICAL WEATHER DAY...THIS IMPLEMENTATION
MAY BE POSTPONED. IN THAT CASE USERS WILL BE NOTIFIED AS FAR IN
ADVANCE AS POSSIBLE.
ALL 15 ALASKA FORECAST ELEMENTS WILL REMAIN EXPERIMENTAL UNTIL
FEEDBACK IS ASSESSED AND A TECHNICAL ANALYSIS IS COMPLETED. AT
THAT TIME THE NWS WILL DETERMINE WHETHER TO TRANSITION THESE
EXPERIMENTAL ELEMENTS FOR ALASKA TO OPERATIONAL STATUS...
DISCONTINUE THEM OR REVISE AND RETAIN THEM AS AN EXPERIMENTAL
ELEMENTS.
NWS WILL ACCEPT COMMENTS AND FEEDBACK ON THE EXPERIMENTAL
ELEMENTS FOR ALASKA THROUGH AT LEAST DECEMBER 31 2009. LINKS TO
SURVEYS ARE ONLINE AT /USE LOWERCASE/:
GRIB2 USERS:
HTTP://WWW.WEATHER.GOV/SURVEY/NWS-SURVEY.PHP?CODE=NDFD-GRIDS
USERS OF NDFD GRAPHICS:
HTTP://WWW.WEATHER.GOV/SURVEY/NWS-SURVEY.PHP?CODE=GFP
USERS OF XML SOAP SERVICE:
HTTP://WWW.WEATHER.GOV/SURVEY/NWS-SURVEY.PHP?CODE=XMLSOAP
FOR GENERAL QUESTIONS REGARDING THE NDFD...PLEASE EMAIL:
NWS.NDFD@xxxxxxxx
FOR TECHNICAL QUESTIONS REGARDING THE NDFD DATA...CONTACT:
DAVID RUTH
CHIEF...MESOSCALE PREDICTION BRANCH
NATIONAL WEATHER SERVICE
OFFICE OF SCIENCE AND TECHNOLOGY
1325 EAST WEST HIGHWAY
SILVER SPRING MARYLAND 20910
DAVID.RUTH@xxxxxxxx
FOR QUESTIONS REGARDING THIS NOTICE OR ABOUT NDFD IN ALASKA...
PLEASE CONTACT:
DUANE CARPENTER
NWS ALASKA REGIONAL HEADQUARTERS
222 WEST 7TH AVE BOX 23
ANCHORAGE ALASKA 99513-7575
DUANE.CARPENTER@xxxxxxxx
NATIONAL TECHNICAL IMPLEMENTATION NOTICES ARE ONLINE AT
/USE LOWERCASE/:
HTTP://WWW.WEATHER.GOV/OS/NOTIF.HTM
$$