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-------- Original Message --------805 NOUS41 KWBC 161219
PNSWSH TECHNICAL IMPLEMENTATION NOTICE 07-22 NATIONAL WEATHER SERVICE HEADQUARTERS WASHINGTON DC 817 AM EDT MON APR 16 2007TO: 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 SERVICES BRANCH
SUBJECT: CHANGES TO TROPICAL CYCLONE PROBABILISTIC WIND SPEED
PRODUCTS: EFFECTIVE MAY 15 2007
REF: TIN 06-71 ANNOUNCING CHANGES TO THE TROPICAL CYCLONE
PROBABILISTIC WIND SPEED PRODUCTS: TRANSMITTED
OCTOBER 23 2006
BEGINNING MAY 15 2007 THE NATIONAL HURRICANE CENTER /NHC/ WILL
HAVE THE CAPABILITY TO ISSUE TROPICAL CYCLONE INCREMENTAL
PROBABILISTIC WIND SPEED FORECASTS.
CURRENTLY THE NHC DISSEMINATES TROPICAL CYCLONE CUMULATIVE PROBABILISTIC WIND SPEED FORECASTS WHEN TROPICAL CYCLONES ARE FORECAST FOR THE ATLANTIC...THE EASTERN PACIFIC...CENTRAL PACIFIC...AND WESTERN PACIFIC HURRICANE BASINS. THESE PRODUCTS ARE DISSEMINATED FOUR TIMES PER DAY WHEN TROPICAL CYCLONE ADVISORIES ARE ISSUED AT 0300...0900...1500...AND 2100 COORDINATED UNIVERSAL TIME /UTC/...AND ALSO IN CONJUNCTION WITH THE ISSUANCE OF SPECIAL TROPICAL CYCLONE ADVISORIES. THESE PRODUCTS PROVIDE THE PROBABILITIES OF SUSTAINED WIND SPEED EXCEEDANCE FOR THREE THRESHOLDS: 34 KNOTS...50 KNOTS AND 64 KNOTS...AT 6 HOURLY FORECAST INTERVALS OUT TO 120 HOURS. THE PRODUCTS ARE ISSUED ON AWIPS GRID 231 IN GRIDDED BINARY /GRIB2/ FORMAT AT A 0.5 DEGREE KILOMETER RESOLUTION. FOR ADDITIONAL DETAILS ON THE PROBABILISTIC WINDS PRODUCTS...TO INCLUDE DEFINITIONS OF THE CUMULATIVE AND INCREMENTAL PROBABILITIES...REFER TO THE NHC WEB SITE AT /USE LOWER CASE LETTERS/:
HTTP://WWW.NHC.NOAA.GOV/ABOUTNHCPROD.SHTML
THE INCREMENTAL DATA WILL BE ISSUED UNDER THE SAME HEADERS AS THE
CUMULATIVE DATA. THERE ARE NO CHANGES TO THE COMMUNICATION
HEADERS....REFERENCE TIN 06-71 TRANSMITTED ON OCTOBER 23 2006.
THE GRIB FIELD DESCRIPTORS FOR THE INCREMENTAL DATA ARE DIFFERENT
FROM THE CUMULATIVE DATA FIELD DESCRIPTORS.
IF YOU HAVE QUESTIONS REGARDING THIS NOTICE...PLEASE CONTACT:
SCOTT KISER
NATIONAL WEATHER SERVICE
MARINE AND COASTAL SERVICES BRANCH
1325 EAST WEST HIGHWAY
SILVER SPRING MARYLAND 20910
EMAIL: SCOTT.KISER@xxxxxxxx
THIS AND ALL OTHER NWS TECHNICAL IMPLEMENTATION NOTICES ARE
POSTED AT /USE LOWER CASE LETTERS/:
HTTP://WWW.NWS.NOAA.GOV/OM/NOTIF.HTM
$$
NNNN
--
Linda Miller - lmiller@xxxxxxxxxxxxxxxx
Community Services, Unidata
University Corporation for Atmospheric Research
P.O. Box 3000
Boulder, CO 80307-3000
303-497-8646 fax: 303-497-8690
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