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NOUS41 KWBC 201701
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PUBLIC INFORMATION STATEMENT...SERVICE CHANGE NOTICE 99-99
NATIONAL WEATHER SERVICE HEADQUARTERS WASHINGTON D.C.
1255 PM EDT WED OCT 20 1999
TO: FAMILY OF SERVICE/FOS/SUBSCRIBERS...NOAA WEATHER WIRE
SERVICE/NWWS/CUSTOMERS...EMWIN CUSTOMERS...OTHER
NATIONAL WEATHER SERVICE/NWS/CUSTOMERS...NWS EMPLOYEES
FROM: THERESE PIERCE...CHIEF...HYDROMETEOROLOGICAL SERVICES
SUBJECT: ENHANCED HPC QPF PRODUCTS
THE HYDROMETEOROLOGICAL PREDICTION CENTER, PART OF THE
NATIONAL WEATHER SERVICE'S NATIONAL CENTERS FOR ENVIRONMENTAL
PREDICTION, WILL EXPAND AND ENHANCE ITS QUANTITATIVE
PRECIPITATION FORECAST (QPF) PRODUCT SUITE EFFECTIVE THE 1200 UTC
CYCLE ON 6 DECEMBER, 1999. THE HPC WILL ISSUE TWICE DAILY 6- AND
24-H QPF PRODUCTS. THESE ENHANCEMENTS ARE DRIVEN BY REQUIREMENTS
FROM OUR DIVERSE USER COMMUNITY.
THE ENHANCED AND EXPANDED 24-H QPF PRODUCT SUITE WILL
INCLUDE FOR THE 1200-1200 UTC FORECAST CYCLE A PRELIMINARY DAY 1
(94Q) ISSUED AT 0615 UTC, A PRELIMINARY DAY 2 (98Q) ISSUED AT
0700 UTC, AND A FINAL DAY 1(94Q), DAY 2(98Q), AND DAY 3 (92Q)
ISSUED AT 1015 UTC. FOR THE 0000-0000 UTC FORECAST CYCLE, HPC
WILL ADDITIONALLY ISSUE A PRELIMINARY DAY 1 QPF (94Q) ISSUED AT
1815 UTC, A PRELIMINARY DAY 2 ISSUED AT 1900 UTC, AND A FINAL DAY
1, DAY 2, AND DAY 3 ISSUED AT 2215 UTC USING THE SAME PRODUCT
IDENTIFIERS.
FOR THE 1200-1200 UTC FORECAST CYCLE, 6-H QPFS (92E, 93E,
9EE AND 9FE) WILL BE ISSUED AT 1015 UTC. FOR THE 0000-0000 UTC
FORECAST CYCLE, THESE 6-H QPFS WILL ALSO BE ISSUED AT 2215 UTC.
AN INTERMEDIATE 0-6 H (91E) QPF WILL BE ISSUED AT 0600 AND 1800
UTC. THE TABLE BELOW SHOWS THE SPECIFIC TIME PERIODS COVERED BY
EACH OF THESE 6-H PRODUCTS.
1200 UTC CYCLE 0000 UTC CYCLE
92E 1200 - 1800 UTC 0000 - 0600 UTC
93E 1800 - 0000 UTC 0600 - 1200 UTC
9EE 0000 - 0600 UTC 1200 - 1800 UTC
9FE 0600 - 1200 UTC 1800 - 0000 UTC
IN ADDITION TO THESE CHANGES, THE GRAPHICAL PRODUCT FORMAT
WILL BE ENHANCED. ISOHYETAL ANALYSES WILL NOW START AT ONE
ONE-HUNDREDTH INCHES (MEASURABLE PRECIPITATION) INSTEAD OF
ONE-QUARTER INCH. THIS ADDITIONAL INFORMATION WILL ALSO APPEAR
IN
THE CODED MESSAGE APPENDED TO THE NMCQPFPFD DISCUSSION. THOSE
USING THIS MESSAGE IN AN AUTOMATED FASHION MUST BE AWARE OF THIS
CHANGE.
QUESTIONS CONCERNING THESE MODIFICATIONS SHOULD BE ADDRESSED
TO MR. DAVID REYNOLDS, CHIEF OF HPC'S FORECAST OPERATIONS BRANCH,
(301) 763-8000 EXTENSION 7317, E-MAIL DREYNOLDS@xxxxxxxxxxxxx ,
OR MR. KEVIN MCCARTHY, DEPUTY DIRECTOR OF THE HPC, (301) 763-8000
EXTENSION 7304, E-MAIL KMCCARTHY@xxxxxxxxxxxxx.
ADDITIONAL INFORMATION INCLUDING A DETAILED PRODUCT SCHEDULE
AND EXAMPLES OF PRODUCT FORMATS CAN BE FOUND AT:
HTTP://WWW.HPC.NCEP.NOAA.GOV/QPF.HTML
NOTE TO INTERNET USERS: THIS AND ALL OTHER NWS SERVICE CHANGE
NOTICES ARE POSTED ON: HTTP://WWW.NWS.NOAA.GOV/OM/NOTIF.HTM
/IN LOWER CASE/
END
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