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-------- Original Message --------566 NOUS41 KWBC 051428
PNSWSH
SERVICE CHANGE NOTICE 10-01
NATIONAL WEATHER SERVICE HEADQUARTERS WASHINGTON DC
930 AM EST TUE JAN 5 2010
TO: SUBSCRIBERS:
-FAMILY OF SERVICES
-NOAA WEATHER WIRE SERVICE
-EMERGENCY MANAGERS WEATHER INFORMATION NETWORK
-NOAAPORT
OTHER NWS PARTNERS...USERS AND EMPLOYEES
FROM: THERESE Z. PIERCE
CHIEF...MARINE AND COASTAL SERVICES BRANCH
SUBJECT: CHANGE TO ISSUANCE CRITERIA FOR TROPICAL CYCLONE
WATCHES AND WARNINGS ISSUED BY THE NATIONAL
HURRICANE CENTER: EFFECTIVE FOR 2010 HURRICANE
SEASON
EFFECTIVE WITH THE 2010 HURRICANE SEASON... THE NATIONAL
HURRICANE CENTER /NHC/ WILL IMPLEMENT NEW ISSUANCE CRITERIA TO
INCREASE THE LEAD TIME ASSOCIATED WITH TROPICAL CYCLONE WATCHES
AND WARNINGS BY 12 HOURS. THIS INCREASE IN LEAD TIME HAS BEEN
MADE POSSIBLE BY IMPROVEMENTS IN TROPICAL CYCLONE TRACK
FORECASTING OVER THE PAST TWO DECADES. THE CHANGE IS EFFECTIVE
ON MAY 15 2010 FOR THE EASTERN PACIFIC HURRICANE BASIN AND ON
JUNE 1 2010 FOR THE ATLANTIC HURRICANE BASIN.
TROPICAL STORM WATCHES WILL GENERALLY BE ISSUED WHEN TROPICAL STORM CONDITIONS ARE POSSIBLE ALONG THE COAST WITHIN 48 HOURS. TROPICAL STORM WARNINGS WILL BE ISSUED WHEN THESE CONDITIONS ARE EXPECTED WITHIN 36 HOURS. SIMILAR INCREASES IN LEAD TIME WILL APPLY TO HURRICANE WATCHES AND WARNINGS. THE HURRICANE WATCHES AND WARNINGS WILL GENERALLY BE TIMED TO PROVIDE 48 AND 36 HOURS OF NOTICE...RESPECTIVELY... BEFORE THE ONSET OF TROPICAL-STORM-FORCE WINDS. THIS THRESHOLD FORCES A SUSPENSION OF MANY HURRICANE PREPAREDNESS ACTIVITIES.
DETAILED DEFINITIONS FOR TROPICAL STORM AND HURRICANE WATCHES AND WARNINGS ARE POSTED ON LINE AT /USE LOWER CASE LETTERS:
HTTP://WWW.NHC.NOAA.GOV/WATCHWARN_CHANGES.SHTML TROPICAL CYCLONE WATCHES AND WARNINGS FROM NHC ARE CONVEYED THROUGH THE ISSUANCE OF EACH OF THE FOLLOWING FORECAST PRODUCTS:
ATLANTIC HURRICANE BASIN: PRODUCT TYPE LINE AWIPS ID/S WMO HEADINGS TROPICAL CYCLONE PUBLIC ADVISORY TCPAT1-5 WTNT31-35 KNHC TROPICAL CYCLONE FORECAST/ADVISORY TCMAT1-5 WTNT21-25 KNHC TROPICAL CYCLONE WATCH/WARNING TCVAT1-5 WTNT81-85 KNHC EASTERN PACIFIC HURRICANE BASIN: PRODUCT TYPE LINE AWIPS ID/S WMO HEADINGS TROPICAL CYCLONE PUBLIC ADVISORY TCPEP1-5 WTPZ31-35 KNHC TROPICAL CYCLONE FORECAST/ADVISORY TCMEP1-5 WTPZ21-25 KNHC TROPICAL CYCLONE WATCH/WARNING TCVEP1-5 WTPZ81-85 KNHCTHERE ARE NO CHANGES TO THE AWIPS IDENTIFIERS...WMO PRODUCT HEADINGS OR PRODUCT ISSUANCE TIMES FOR THE ABOVE PRODUCTS. THE NHC IS RESPONSIBLE FOR ALL METEOROLOGICAL DECISIONS CONCERNING FORECASTING OF TROPICAL AND SUBTROPICAL SYSTEMS FOR THE ATLANTIC OCEAN AND THE EASTERN PACIFIC OCEAN...NORTH OF THE EQUATOR AND EAST OF 140 DEGREES WEST LONGITUDE.
IF YOU HAVE QUESTIONS...PLEASE CONTACT: JAMES FRANKLIN NATIONAL WEATHER SERVICE NATIONAL HURRICANE CENTER11691 SW 17TH STREET MIAMI FLORIDA 33165
305-229-4475 NATIONAL SERVICE CHANGE NOTICES ARE ONLINE AT /USE LOWERCASE/: HTTP://WWW.WEATHER.GOV/OS/NOTIF/HTM $$ NNNN
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