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-------- Original Message --------122 NOUS41 KWBC 231211
PNSWSH TECHNICAL IMPLEMENTATION NOTICE 06-71 NATIONAL WEATHER SERVICE HEADQUARTERS WASHINGTON DC 810 AM EDT MON OCT 23 2006TO: 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 JANUARY 18 2007
EFFECTIVE JANUARY 18 2007 AT 0300 COORDINATED UNIVERSAL TIME
/UTC/...THE TEMPORAL RESOLUTION OF TROPICAL CYCLONE PROBABILISTIC
WIND SPEED FORECASTS WILL CHANGE FROM 12 HOURS TO 6 HOURS.
CURRENTLY NWS ROUTINELY DISSEMINATES TROPICAL CYCLONE 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: 0300...0900...1500...AND 2100 UTC...AND IN CONJUNCTION WITH THE ISSUANCE OF SPECIAL TROPICAL CYCLONE ADVISORIES. THESE PRODUCTS CURRENTLY PROVIDE THE PROBABILITIES OF SUSTAINED WIND SPEED EXCEEDANCE FOR THREE THRESHOLDS: 34 KNOTS ...50 KNOTS...AND 64 KNOTS...AT 12 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. THE WMO HEADERS AND ASSOCIATED FORECAST INTERVALS FOR THE EXISTING PRODUCTS ARE AS FOLLOWS:
LDGA98 KNHC 0 HOUR LDGC98 KNHC12 HOUR LDGE98 KNHC24 HOUR LDGG98 KNHC36 HOUR LDGI98 KNHC48 HOUR LDGJ98 KNHC60 HOUR LDGK98 KNHC72 HOUR LDGL98 KNHC84 HOUR LDGM98 KNHC96 HOUR LDGN98 KNHC 108 HOUR LDGO98 KNHC 120 HOURON JANUARY 18 2007 AT 0300 UTC...THE TEMPORAL RESOLUTION OF THESE FORECAST PRODUCTS WILL CHANGE FROM 12 HOURS TO 6 HOURS. THE WMO HEADERS AND THE ASSOCIATED FORECAST INTERVALS FOR THE NEW SIX HOURLY PRODUCTS ARE LISTED BELOW. USERS WISHING TO RECEIVE THE NEW SIX HOURLY FORECAST PRODUCTS MUST MAKE THE FOLLOWING CHANGES TO THEIR DATABASES.
WMO HEADERFORECAST INTERVAL ACTION LDGB98 KNHC 6 HOURS ADD LDGD98 KNHC 18 HOURSADD LDGF98 KHHC 30 HOURSADD LDGH98 KNHC 42 HOURSADD
MDGM98 KNHC 54 HOURSADDMDGN98 KNHC 66 HOURSADD MDGT98 KNHC 78 HOURSADD
MDGU98 KNHC 90 HOURSADD MDGV98 KNHC 102 HOURSADDMDGW98 KNHC 116 HOURSADD
IF YOU HAVE QUESTIONS REGARDING THIS NOTICE...PLEASE CONTACT:
TIMOTHY SCHOTT
NATIONAL WEATHER SERVICE
MARINE AND COASTAL SERVICES BRANCH
1325 EAST WEST HIGHWAY
SILVER SPRING MARYLAND 20910
EMAIL: TIMOTHY.SCHOTT@xxxxxxxx
THIS AND ALL OTHER NWS TECHNICAL IMPLEMENTATION NOTICES ARE
AVAILABLE 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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