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-------- Original Message --------170 NOUS41 KWBC 091625
PNSWSH
SERVICE CHANGE NOTICE 07-06
NATIONAL WEATHER SERVICE HEADQUARTERS WASHINGTON DC
1145 PM EST FRI MAR 09 2007
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...NWS EMPLOYEES
FROM: ELI JACKS
CHIEF...FIRE AND PUBLIC WEATHER SERVICES BRANCH
SUBJECT: CHANGES IN AREA FORECAST MATRICES...POINT FORECAST
MATRICES...STATE FORECAST PRODUCTS AND ZONE FORECAST
PRODUCT... EFFECTIVE WITH AWIPS BUILD 7.2
EFFECTIVE WITH EACH NATIONAL WEATHER SERVICE FORECAST OFFICES
INSTALLATION OF AWIPS BUILD 7.2...THE FOLLOWING PRODUCT CHANGES
OCCUR.
1. THE PRODUCT EXPIRATION TIME OF THE AREA FORECAST MATRICES /AFM/...POINT FORECAST MATRICES /PFM/...STATE FORECAST PRODUCT /SFP/...TABULAR STATE FORECAST PRODUCT /SFT/ AND ZONE FORECAST PRODUCT /ZFP/ CHANGES. THE PRODUCT EXPIRATION TIME FOR THESE PRODUCTS IS THE NEXT MANDATORY PRODUCT ISSUANCE TIME INSTEAD OF A STANDARD 15 HOURS FROM THE PRODUCT ISSUANCE TIME.
2. A NEW AFM/PFM VOLCANIC ASH FALL CODE /AF/ REPLACES THE OLD VOLCANIC ASH FALL CODE /VA/.
3. THE PROBABILITY OF PRECIPITATION /POP...USE LOWER CASE LETTER O/ IS INCLUDED IN THE ZFP FOR ALL CATEGORICAL /POP OF 80...90... OR 100/ FORECASTS UNLESS OTHERWISE NOT REQUIRED BY NWSI 10- 503...WFO PUBLIC WEATHER FORECAST PRODUCTS SPECIFICATION... DECEMBER 19 2005... SECTION 9.3.5.3.G...CASES WHERE NO POP VALUE IS REQUIRED.
4. NIGHTTIME POP IS INCLUDED IN THE SFT.THESE POP CHANGES PROVIDE A MORE REPRESENTATIVE FORECAST FOR PRECIPITATION DURING THE FORECAST PERIOD.
5. ONE OF THE AFM/PFM PREDOMINANT SKY COVER CATEGORIES CHANGES. THE AFM/PFM PREDOMINANT SKY COVER GREATER THAN 50 PERCENT AND LESS THAN OR EQUAL TO 87 PERCENT CATEGORY /CURRENTLY CODE BK/ IS SPLIT INTO TWO SEPARATE CATEGORIES:
A. SKY COVER CODE B1 /FORMERLY BK/ FOR CLOUD AMOUNTS GREATER THAN 50 PERCENT AND LESS THAN OR EQUAL TO 69 PERCENT IS EXPRESSED AS PARTLY SUNNY OR MOSTLY CLOUDY.
B. SKY COVER CODE B2 /FORMERLY BK/ FOR CLOUD AMOUNTS GREATER THAN 69 PERCENT AND LESS THAN OR EQUAL TO 87 PERCENT IS EXPRESSED AS MOSTLY CLOUDY OR CONSIDERABLE CLOUDINESS.
THIS SKY COVER CODE CHANGE PROVIDES A MORE REPRESENTATIVE VALUE FOR CLOUD COVER AND MORE CLOSELY MATCHES THE AUTOMATED SURFACE OBSERVING SYSTEM /ASOS/ CRITERIA. THE TABLE IN THE LINK BELOW DESCRIBES THE COMPLETE SKY COVER CODES AND EQUIVALENT SKY COVER EXPRESSIONS USED IN THE AFM/PFM.
HTTP://WWW.WEATHER.GOV/NDFD/RESOURCES/PFM_SKY_COVER_CODE.HTMAWIPS BUILD 7.2 SHOULD BE DEPLOYED BY MID-APRIL 2007. THE ABOVE CHANGES HAVE BEEN DETAILED IN NATIONAL WEATHER SERVICE INSTRUCTION /NWSI/ 10-503...WFO PUBLIC WEATHER FORECAST PRODUCTS SPECIFICATION SINCE DECEMBER 19 2005.
IF YOU HAVE QUESTIONS ABOUT THESE CHANGES PLEASE CONTACT:
ANDY HORVITZ
NATIONAL WEATHER SERVICE
1325 EAST WEST HIGHWAY
SILVER SPRING MD 20910
PHONE: 301-713-1858 EXT. 166
EMAIL: ANDY.HORVITZ@xxxxxxxx
THIS AND ALL OTHER NWS SERVICE CHANGE NOTICES ARE POSTED ONLINE
AT /USE LOWER CASE LETTERS/:
HTTP://WWW.NWS.NOAA.GOV/OM/NOTIF.HTM
$$
NNNN
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