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915
NOUS41 KWBC 281959
PNSWSH
SERVICE CHANGE NOTICE 04-45...AMENDED
NATIONAL WEATHER SERVICE HEADQUARTERS WASHINGTON DC
300 PM EST FRI JAN 28 2005
TO: 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: ROBERT J. MCLEOD
CHIEF...AWARENESS BRANCH
OFFICE OF CLIMATE...WATER...AND WEATHER SERVICES
SUBJECT: AMENDED...OPERATIONAL IMPLEMENTATION OF THE VALID TIME
EVENT CODE /VTEC/ IN MOST NWS EVENT-DRIVEN PRODUCTS
EFFECTIVE FEBRUARY 8 2005...EXCEPT EFFECTIVE MARCH 16
2005 FOR WFO ANCHORAGE
REFER TO: SERVICE CHANGE NOTICE 04-45 ISSUED AUGUST 2 2005
SERVICE CHANGE NOTICE 04-45 AMENDED ISSUED NOVEMBER 5 2004
SERVICE CHANGE NOTICE 04-58 ISSUED DECEMBER 29 2004
AMENDED JANUARY 28 2005: IMPLEMENTATION OF VTEC IN PRODUCTS
LISTED BELOW THAT ARE ISSUED BY WFO ANCHORAGE WILL BE DELAYED
FROM FEBRUARY 8 2005 TO MARCH 16 2005 AT 4PM AST/8PM EST. THIS
DELAYED IMPLEMENTATION WILL TAKE PLACE AT THE SAME TIME AS THE
IMPLEMENTATION OF THE PRODUCTS REFERRED TO IN SERVICE CHANGE
NOTICE 04-58.
AMENDED NOVEMBER 5 2004 TO DELAY IMPLEMENTATION OF VTEC IN MANY
PRODUCTS. ANALYSIS OF THE COMBINED VTEC AND WATCH BY COUNTY
/WBC/ OPERATIONAL TEST AND EVALUATION DATA BY NWS AND NWS
PARTNERS RESULTED IN THE FOLLOWING ACTIONS RELATING TO VTEC:
-VTEC WILL BE OPERATIONALLY IMPLEMENTED IN FIVE SHORT-
DURATION WARNING PRODUCTS ISSUED BY WEATHER FORECAST
OFFICES /WFO/ AND FINAL WATCH OUTLINE UPDATE MESSAGES /WOU/
ISSUED BY THE STORM PREDICTION CENTER /SPC/. SEE THE
PRODUCT LIST BELOW.
-VTEC WILL BE IMPLEMENTED IN EXPERIMENTAL MODE IN UPDATE
WOU/S ISSUED BY SPC AND IN EXPERIMENTAL WATCH COUNTY
NOTIFICATION MESSAGES /WCN/ ISSUED BY ALL WFO/S IN THE
CONTIGUOUS UNITED STATES AND THE STATE OF HAWAII. SEE
AMENDED SERVICE CHANGE NOTICES 04-47 AND 04-48 FOR DETAILS
RELATING TO WBC PRODUCTS.
-THE OPERATIONAL IMPLEMENTATION OF VTEC IN OTHER PRODUCTS...
INCLUDING ALL HYDROLOGIC AND FIRE WEATHER PRODUCTS...
WINTER STORM AND NON-PRECIPITATION WATCH/WARNING/ADVISORY
PRODUCTS... AND MOST COASTAL AND MARINE PRODUCTS... WILL BE
ANNOUNCED IN FUTURE SERVICE CHANGE NOTICES AT LEAST 120
DAYS BEFORE SUCH IMPLEMENTATION.
-SELECTED WFO/S WILL CONTINUE TO ISSUE OPERATIONAL AND TEST
PRODUCTS CONTAINING EXPERIMENTAL OR TEST VTEC STRINGS UNTIL
OPERATIONAL IMPLEMENTATION.
ON TUESDAY FEBRUARY 8 2005 AT 1800 COORDINATED UNIVERSAL TIME
/UTC/... ALL WEATHER FORECAST OFFICES /WFO/ WILL OPERATIONALLY
IMPLEMENT THE VALID TIME EVENT CODE /VTEC/ IN MOST SHORT-
DURATION WARNING PRODUCTS ISSUED BY WFO/S AND IN THE NATIONAL
WATCH OUTLINE UPDATE MESSAGE /WOU/ ISSUED BY THE SPC. IF
FEBRUARY 8 2005 IS DECLARED A NATIONAL CRITICAL WEATHER DAY...
IMPLEMENTATION WILL OCCUR ON THE NEXT WEEKDAY NOT DECLARED A
CRITICAL WEATHER DAY.
THE VTEC ALWAYS IS USED IN CONJUNCTION WITH...AND PROVIDES
SUPPLEMENTARY INFORMATION TO... THE UNIVERSAL GEOGRAPHIC CODE
/UGC/ TO FURTHER AID IN THE AUTOMATED DELIVERY OF NWS TEXT
PRODUCTS TO USERS. THE VTEC PROVIDES INFORMATION ON THE EVENT.
THE UGC DESCRIBES THE AFFECTED GEOGRAPHIC AREA.
THERE ARE TWO FORMS OF VTEC...THE PRIMARY OR P-VTEC AND... IN
CERTAIN HYDROLOGIC PRODUCTS... A SUPPLEMENTARY HYDROLOGIC OR H-
VTEC ALWAYS USED IN CONJUNCTION WITH AND OCCURRING ON THE LINE
IMMEDIATELY AFTER THE P-VTEC STRING/S/. NONE OF THE PRODUCTS
OPERATIONALLY IMPLEMENTING VTEC ON FEBRUARY 8 2005 WILL CONTAIN
THE H-VTEC STRING.
THE P-VTEC STRING/S/ AND ANY H-VTEC STRING/S/ OCCUR IMMEDIATELY
AFTER THE UGC STRING AND...DEPENDING ON WHETHER THE PRODUCT IS
SEGMENTED OR NOT...WILL OCCUR IN DIFFERENT PLACES IN THE
PRODUCT.
BEGINNING ON THE IMPLEMENTATION DATE...THE FOLLOWING NWS WFO
TEXT
PRODUCT CATEGORIES WILL CONTAIN OPERATIONAL VTEC:
PUBLIC PRODUCTS
SEVERE THUNDERSTORM WARNING SVR
TORNADO WARNING TOR
SEVERE WEATHER STATEMENT SVS
COASTAL AND MARINE PRODUCTS
SPECIAL MARINE WARNING SMW
MARINE WEATHER STATEMENT /ONLY THOSE
WHICH FOLLOW UP AN SMW PRODUCT/ MWS
BEGINNING ON THE IMPLEMENTATION DATE...THE FOLLOWING NWS
NATIONAL
TEXT PRODUCT CATEGORY WILL CONTAIN OPERATIONAL VTEC:
STORM PREDICTION CENTER PRODUCT
WATCH OUTLINE UPDATE WOU
ADDITIONAL PERIODS OF VTEC TESTING ARE PLANNED IN 2005 FOR
PRODUCTS TESTED THIS YEAR AND NOT BEING IMPLEMENTED
OPERATIONALLY ON FEBRUARY 8 2005 AS PREVIOUSLY SCHEDULED. THESE
PRODUCTS INCLUDE HYDROLOGIC AND FIRE WEATHER PRODUCTS... WINTER
STORM AND NON-PRECIPITATIOIN WATCH/WARNING/ADVISORY PRODUCTS...
AND SOME COASTAL AND MARINE PRODUCTS. TESTING WILL ALSO INCLUDE
ADDITIONAL NWS TROPICAL WEATHER AND ROUTINE MARINE TEXT PRODUCTS
THAT ARE SCHEDULED TO INCLUDE VTEC AT A LATER DATE. THE
IMPLEMENTATION SCHEDULE FOR ALL ADDITIONAL PRODUCTS WILL BE
LISTED IN FUTURE SERVICE CHANGE NOTICES.
VTEC IS DESCRIBED IN DETAIL IN NWS INSTRUCTION /NWSI/ 10-1703...
WHICH IS AVAILABLE ON THE NWS DIRECTIVES WEB SITE AT /USE LOWER
CASE LETTERS/:
HTTP://WWW.NWS.NOAA.GOV/DIRECTIVES
NWSI 10-1703 WILL BE UPDATED TO INCLUDE CHANGES RECOMMENDED
DURING THE RECENT VTEC/WBC OPERATIONAL TEST AND EVALUATION. THE
UPDATED NWSI 10-1703 WILL BE POSTED IN DRAFT FORM ON THE VTEC
WEB SITE LISTED BELOW BY NOVEMBER 30 2004. THE UPDATE SHOULD BE
AVAILABLE ON THE ABOVE NWS DIRECTIVES WEB SITE BY JANUARY 2005
AFTER FINAL INTERNAL NWS COORDINATION AND APPROVAL.
MORE BACKGROUND INFORMATION ON VTEC CAN BE FOUND AT THE VTEC WEB
SITE AT /USE LOWER CASE LETTERS/:
HTTP://WWW.NWS.NOAA.GOV/OM/VTEC
IF YOU HAVE ANY QUESTIONS OR COMMENTS...PLEASE CONTACT:
HERB WHITE
DISSEMINATION SERVICES MANAGER
SILVER SPRING MARYLAND
PHONE: 301-713-0090 X 146
E-MAIL: HERBERT.WHITE@xxxxxxxx
THIS AND OTHER NWS SERVICE CHANGE NOTICES ARE POSTED ON /USE
LOWER CASE LETTERS/:
HTTP://WWW.NWS.NOAA.GOV/OM/NOTIF.HTM
$$
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