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-------- Original Message --------777 NOUS41 KWBC 121831
PNSWSH
TECHNICAL IMPLEMENTATION NOTICE 10-05
NATIONAL WEATHER SERVICE HEADQUARTERS WASHINGTON DC
100 PM EST TUE JAN 12 2010
TO: SUBSCRIBERS:
-FAMILY OF SERVICES
-NOAA WEATHER WIRE SERVICE
-EMERGENCY MANAGERS WEATHER INFORMATION NETWORK
-NOAAPORT
OTHER NWS PARTNERS...AND NWS EMPLOYEES
FROM: THERESE PIERCE
CHIEF...MARINE AND COASTAL SERVICES WEATHER BRANCH
SUBJECT: INCREASE IN TEMPORAL RESOLUTION TO SIGNIFICANT WAVE HEIGHT GRID IN THE NATIONAL DIGITAL FORECAST DATABASE /NDFD/
EFFECTIVE WEDNESDAY FEBRUARY 17 2010
EFFECTIVE WEDNESDAY FEBRUARY 17 2010 AT 1400 COORDINATED UNIVERSAL TIME
/UTC/...THE NDFD SIGNIFICANT WAVE HEIGHT ELEMENT WILL TRANSITION TO A
TEMPORAL RESOLUTION OF EVERY 6 HOURS FROM THE PRESENT EVERY 12 HOURS. THIS
CHANGE WILL OCCUR ACROSS THE ENTIRE CONTERMINOUS UNITED STATES
/CONUS/...PUERTO RICO AND THE VIRGIN ISLANDS... HAWAII... AND GUAM
SECTORS...INCLUDING ALL 16 CONUS SUBSECTORS.
THE WAVE HEIGHT GRID IN THE ALASKA SECTOR WILL CONTINUE TO BE PRODUCED EVERY
12 HOURS AND REMAIN IN EXPERIMENTAL STATUS UNTIL FURTHER NOTICE.
THE SIGNIFICANT WAVE HEIGHT GRID IS THE AVERAGE WAVE HEIGHT /TROUGH TO CREST/ OF THE ONE-THIRD HIGHEST WAVES VALID FOR THE TOP OF THE DESIGNATED HOUR. SIGNIFICANT WAVE HEIGHT IS THE COMBINATION OF WIND WAVES AND SWELL. THE SIGNIFICANT WAVE HEIGHT GRID WILL NOW BE ISSUED EVERY 6 HOURS OUT TO 120 HOURS. THIS CHANGE PRIMARILY AFFECTS USERS WHO PULL NDFD ELEMENTS IN THE GRIB2 FORMAT FROM THE NWS FILE TRANSFER PROTOCOL /FTP/ SERVER... EITHER VIA THE INTERNET OR THE FAMILY OF SERVICES /FOS/ SERVER ACCESS SERVICE... AND USERS WHO PULL HTML FILES FROM THE NWS HYPERTEXT TRANSFER PROTOCOL /HTTP/ SERVER. THOSE USERS WILL NOW BE ABLE TO PULL THIS ELEMENT AT A FINER TIME SCALE RESOLUTION. THE SIGNIFICANT WAVE HEIGHT GRID WILL CONTINUE TO BE AVAILABLE FROM THE NDFD IN THE FOLLOWING STANDARD METHODS:
- GRIDDED BINARY 2 /GRIB2/ FILES VIA HYPERTEXT TRANSFER PROTOCOL /HTTP/ AND FILE TRANSFER PROTOCOL /FTP/ - EXTENSIBLE MARKUP LANGUAGE /XML/ VIA SIMPLE OBJECT ACCESS PROTOCOL /SOAP/
- GRAPHICS VIA WEB BROWSERGENERAL INFORMATION ON ACCESSING AND USING NDFD ELEMENTS IS ONLINE AT /USE LOWERCASE/:
HTTP://NDFD.WEATHER.GOV/TECHNICAL.HTMIF FEBRUARY 17 2010 IS A CRITICAL WEATHER DAY... THIS IMPLEMENTATION MAY BE POSTPONED. USERS WILL BE NOTIFIED OF THAT DECISION VIA A TECHNICAL IMPLEMENTATION NOTICE /TIN/ AS FAR IN ADVANCE AS POSSIBLE.
FOR GENERAL QUESTIONS REGARDING NDFD DATA...PLEASE EMAIL: NWS.NDFD@xxxxxxxx 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 DAVID.RUTH@xxxxxxxx FOR QUESTIONS REGARDING THIS NOTICE...PLEASE CONTACT: DAVID SOROKA MANAGER MARINE AND COASTAL SERVICES WEATHER BRANCH NATIONAL WEATHER SERVICE OFFICE OF CLIMATE WATER AND WEATHER SERVICES 1325 EAST WEST HIGHWAY SILVER SPRING MARYLAND 20910 DAVID.SOROKA@xxxxxxxxTECHNICAL IMPLEMENTATION NOTICES SPECIFICALLY RELATED TO THE NDFD ARE ONLINE AT /USE LOWERCASE/: HTTP://WWW.WEATHER.GOV/NDFD/TINS.HTM NATIONAL TECHNICAL IMPLEMENTATION NOTICES ARE ONLINE AT /USE LOWER CASE/: HTTP://WWW.WEATHER.GOV/OS/NOTIF.HTM $$ NNNN
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