688
NOUS41 KWBC 102125
PNSWSH
PUBLIC INFORMATION STATEMENT...SERVICE CHANGE NOTICE 03-16
NATIONAL WEATHER SERVICE HEADQUARTERS WASHINGTON DC
420 PM EST MON MAR 10 2003
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 THERESE Z. PIERCE
CHIEF...MARINE AND COASTAL WEATHER SERVICES BRANCH
SUBJECT CHANGES TO TROPICAL CYCLONE PRODUCTS...EFFECTIVE
MAY 15 2003
EFFECTIVE MAY 15 2003...IN RESPONSE TO THE NEEDS OF NWS
CUSTOMERS...THE TROPICAL PREDICTION CENTER/NATIONAL HURRICANE
CENTER /NHC/ AND THE CENTRAL PACIFIC HURRICANE CENTER /CPHC/
WILL EXTEND TROPICAL CYCLONE FORECAST PRODUCTS FROM 3 DAYS
/72 HOURS/ TO 5 DAYS /120 HOURS/. INCREASING TROPICAL CYCLONE
FORECASTS TO 5 DAYS CHANGES THE FOLLOWING PRODUCTS.
PRODUCT WMO HEADING AWIPS ID
TROPICAL CYCLONE FORECAST/ADVISORY
ATLANTIC WTNT<21-25> KNHC TCMAT<1-5>
EAST PACIFIC WTPZ<21-25> KNHC TCMEP<1-5>
CENTRAL PACIFIC WTPA<21-25> PHFO TCMCP<1-5>
TROPICAL CYCLONE DISCUSSION
ATLANTIC WTNT<41-45> KNHC TCDAT<1-5>
EAST PACIFIC WTPZ<41-45> KNHC TCDEP<1-5>
CENTRAL PACIFIC WTPA<41-45> PHFO TCDCP<1-5>
NOTE...THERE ARE NO CHANGES TO WMO HEADINGS OR AWIPS IDENTIFIERS
AND NO ACTIONS ARE REQUIRED FOR CONTINUED RECEIPT OF PRODUCTS
FROM NHC AND CPHC. HOWEVER...THE ISSUING OFFICE LINE IDENTIFIER
IN THE MASS NEWS DISSEMINATOR BLOCK FOR THE TCM AND TCD WILL
CHANGE TO ENSURE THESE PRODUCTS CONFORM TO NWS INSTRUCTION /NWSI/
10-1701...ENTITLED TEXT FORMATS AND CODES.
THE ISSUING OFFICE LINE IDENTIFIER FOR NHC PRODUCTS WILL READ
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
THE ISSUING OFFICE LINE IDENTIFIER FOR CPHC PRODUCTS WILL READ
NWS CENTRAL PACIFIC HURRICANE CENTER HONOLULU HI
OTHER CHANGES TO THE TCM...
48 AND 72 HOUR OUTLOOK LINES BECOME FORECAST LINES.
96 AND 120 HOUR OUTLOOK LINES ADDED WITH FORECAST POSITIONS AND
FORECAST MAXIMUM SUSTAINED WIND SPEEDS REPORTED TO THE NEAREST 5
KNOTS.
EXTENDED OUTLOOK CAUTIONARY NOTE MODIFIED TO INCLUDE THE 96 AND
120 HOUR TRACK AND WIND SPEED AVERAGE ERRORS.
REQUEST FOR 3 HOURLY SHIP REPORTS MOVED JUST PRIOR TO THE NEXT
ADVISORY LINE
OTHER CHANGES FOR THE TCD...
96 AND 120 HOUR FORECAST POSITIONS AND MAXIMUM SUSTAINED WIND
SPEEDS /NEAREST 5 KNOTS/ ADDED TO THE FORECAST TABLE
REMOVED /S/ FROM KNOTS IN THE FORECAST TABLE
A WEB PAGE HAS BEEN ESTABLISHED TO ALLOW USERS TO TEST THE
CHANGES TO ENSURE THEY CAN DECODE THE MODIFIED PRODUCTS
CORRECTLY. SEE EXAMPLES AT /USE LOWER CASE LETTERS/
WWW.NHC.NOAA.GOV/NEWFORMAT_EXAMPLES.SHTML
USERS OF TROPICAL CYCLONE FORECAST PRODUCTS ARE ENCOURAGED TO NOT
FOCUS ON JUST THE FORECAST POSITION OF A STORM CENTER...BUT TO
CONSIDER THE UNCERTAINTY ASSOCIATED WITH STORM TRACK ERRORS...AS
WELL AS THE POTENTIALLY LARGE GEOGRAPHIC AREA THAT MAY BE
IMPACTED BY TROPICAL CYCLONE CONDITIONS. AVERAGE ERRORS NOTED IN
THE TCM PRODUCTS ARE BASED ON THE PAST TWO YEARS OF EXPERIMENTAL
FORECASTS.
IF YOU HAVE ANY QUESTIONS...PLEASE CONTACT
MR. SCOTT KISER
NATIONAL WEATHER SERVICE
MARINE AND COASTAL SERVICES BRANCH
1325 EAST WEST HWY ROOM 13126
SILVER SPRING MARYLAND 20910
PHONE /301/ 713 1677 EXTENSION 121
THIS NOTICE AND OTHER SERVICE CHANGE NOTICES CAN BE FOUND ON THE
INTERNET AT /USE LOWER CASE/
WWW.NWS.NOAA.GOV/OM/NOTIF/HTM
$$
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