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-------- Original Message --------654 NOUS41 KWBC 271225
PNSWSH TECHNICAL IMPLEMENTATION NOTICE 07-42...AMENDED NATIONAL WEATHER SERVICE HEADQUARTERS WASHINGTON DC 825 AM EDT FRI AUG 27 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/ PARTNERS AND OTHER USERS...NWS EMPLOYEES
FROM: PAUL HIRSCHBERG
SCIENCE PLANS BRANCH CHIEF
OFFICE OF SCIENCE AND TECHNOLOGY /OST/
SUBJECT: AMENDED: CHANGES TO GFS-BASED MOS AND LAMP
PRODUCTS: EFFECTIVE SEPTEMBER 11 2007
AMENDED TO SAY THE 12-HR MEAN TOTAL SKY COVER GUIDANCE WILL NOT BE REPLACED. THE THIRD CHANGE LISTED IN TIN 07-42...TRANSMITTED JUNE 21 2007...STATED THE REPLACEMENT OF THE 12-HR MEAN TOTAL SKY COVER GUIDANCE IN THE EXTENDED-RANGE GFS MOS TEXT PRODUCT WITH 12-HR MEAN OPAQUE SKY COVER DERIVED FROM THE HOURLY OPAQUE CLOUD GUIDANCE. DURING TESTING IT WAS DETERMINED THAT THE POST- PROCESSING TECHNIQUE USED TO DERIVE THE 12-HR MEAN OPAQUE SKY COVER GUIDANCE PRODUCED LESS SKILLFUL GUIDANCE THAN THE 12-HR MEAN TOTAL SKY COVER GUIDANCE CURRENTLY BEING DISSEMINATED. AS A RESULT WE WILL NOT REPLACE THE EXISTING 12-HR SKY COVER GUIDANCE UNTIL SUCH TIME AS A FULL REDEVELOPMENT OF THE GUIDANCE CAN BE DONE. A NEW TIN WILL BE ISSUED WHEN THE REPLACEMENT DOES OCCUR. CHANGES 1 AND 2 IN TIN 07-42 WILL HAPPEN AS PLANNED ON SEPTEMBER 11 2007.
EFFECTIVE TUESDAY SEPTEMBER 11 2007...BEGINNING WITH THE 1200 UNIVERSAL COORDINATED TIME /UTC/ CYCLE...THE NWS WILL MAKE TWO CHANGES TO THE GLOBAL FORECAST SYSTEM /GFS/ -BASED MODEL OUTPUT STATISTICS /MOS/ SYSTEM. ONE OF THESE CHANGES IS TO THE GFS-
BASED LOCALIZED AVIATION MOS PROGRAM /LAMP/ PRODUCTS. CHANGE 1:STATIONS WILL BE ADDED TO THE GFS-BASED MOS VISIBILITY... OBSTRUCTION TO VISION AND PROBABILITY OF PRECIPITATION CHARACTERISTIC GUIDANCE FOR THE 0000...0600...1200...AND 1800 CYCLES. THIS WILL BRING THE NUMBER OF STATIONS WITH GUIDANCE FOR THESE ELEMENTS TO 1593. A LIST OF THE STATIONS AVAILABLE IN THE MOS GUIDANCE IS AVAILABLE AT /USE LOWER CASE LETTERS/:
HTTP://WWW.NWS.NOAA.GOV/MDL/SYNOP/STADRG.HTML
GFS-LAMP WILL BEGIN PRODUCING VISIBILITY...CONDITIONAL
VISIBILITY...AND OBSTRUCTION TO VISION GUIDANCE AT THESE
STATIONS FOR THE 0000...0600...1200...AND 1800 UTC CYCLES...AND
PRECIPITATION CHARACTERISTIC GUIDANCE FOR ALL EIGHT CYCLES. A
FULL DESCRIPTION OF THIS CHANGE IS AVAILABLE AT /USE LOWER CASE
LETTERS/:
HTTP://WWW.NWS.NOAA.GOV/MDL/LAMP/GFSLAMP/DOCS/CHANGE_NOTICE_0620 2007.SHTMLTHESE CHANGES WILL SLIGHTLY ALTER THE FORMAT OF THE MAV AND LAV TEXT PRODUCTS BECAUSE NEW LINES CONTAINING THIS GUIDANCE WILL BE ADDED TO THE EXISTING BULLETINS TO ACCOMMODATE THESE CHANGES. THE COMMUNICATION IDENTIFIERS FOR THE TEXT AND BUFR PRODUCTS AFFECTED BY THIS CHANGE ARE SHOWN IN TABLE 1 BELOW.
CHANGE 2:THE CLIMATOLOGICAL MAXIMUM AND MINIMUM TEMPERATURE VALUES CURRENTLY INCLUDED IN THE GFS-BASED MOS EXTENDED-RANGE MEX TEXT PRODUCTS WILL BE REPLACED WITH CLIMATOLOGICAL VALUES DERIVED FROM THE GRIDDED PARAMETER-ELEVATION REGRESSIONS ON INDEPENDENT SLOPES MODEL /PRISM/ NORMALS. THIS DATA IS AVAILABLE COURTESY OF A COOPERATIVE VENTURE BETWEEN OREGON STATE UNIVERSITY AND THE UNITED STATES DEPARTMENT OF AGRICULTURE-NATURAL RESOURCES CONSERVATION SERVICE. THE PRISM NORMALS ARE CREATED USING DATA FROM 1971 TO 2000. CLIMATOLOGICAL MAXIMUM AND MINIMUM TEMPERATURES WILL BE AVAILABLE FOR ALL SITES IN THE MEX TEXT PRODUCT THAT ARE LOCATED IN THE CONTIGUOUS UNITED STATES AND ALASKA. THE COMMUNICATION IDENTIFIERS FOR THE MEX TEXT PRODUCTS ARE SHOWN IN TABLE 2 BELOW. TABLE 1. COMMUNICATION IDENTIFIERS FOR THE GFS-BASED MOS AND LAMP TEXT AND BUFR PRODUCTS AFFECTED BY STATION UPDATES. NOTE THAT THE 69 NEW STATIONS ARE CURRENTLY IN THE BUFR PRODUCTS. THE ONLY CHANGE WILL BE THAT THE GUIDANCE VALUES FOR THE ELEMENTS LISTED ABOVE WILL NO LONGER BE SET TO MISSING.
WMO HEADING AWIPS ID WMO HEADING
MOS TEXT PRODUCTS MOS BUFR PRODUCTSFOUS21 KWNO MAVNE1 JSML31 KWNO FOUS22 KWNO MAVSE1 JSML32 KWNO FOUS23 KWNO MAVNC1 JSML33 KWNO
FOUS24 KWNO MAVSC1 JSML34 KWNO FOUS25 KWNO MAVRM1 JSML35 KWNO FOUS26 KWNO MAVWC0 JSML36 KWNO FOAK37 KWNO MAVAJK JSML37 KWNO LAMP TEXT PRODUCT LAMP BUFR PRODUCTS FOUS11 KWNO LAVUSA JSMF11 KWNOJSMF12 KWNO JSMF13 KWNO JSMF14 KWNO JSMF15 KWNO JSMF16 KWNO JSMF17 KWNO TABLE 2. COMMUNICATION IDENTIFIERS FOR THE GFS-BASED MOS MEX EXTENDED-RANGE PUBLIC WEATHER TEXT PRODUCTS AFFECTED BY CHANGES 2 AND 3.
WMO HEADING AWIPS ID
FEPA20 KWNO MEXPA0FEUS21 KWNO MEXNE1 FEUS22 KWNO MEXSE1 FEUS23 KWNO MEXNC1 FEUS24 KWNO MEXSC1 FEUS25 KWNO MEXRM1 FEUS26 KWNO MEXWC0 FEAK37 KWNO MEXAJK
FEAK38 KWNO MEXAFC
FEAK39 KWNO MEXAFG
IF YOU HAVE QUESTIONS ABOUT THE MOS GUIDANCE...PLEASE CONTACT:
REBECCA COSGROVE
MDL/SILVER SPRING MARYLAND
PHONE: 301-713-0023 EXT. 124
E-MAIL: REBECCA.COSGROVE@xxxxxxxx
LINKS TO THE MOS PRODUCTS...ALONG WITH DESCRIPTIONS...CAN BE
FOUND AT /USE LOWER CASE LETTERS/:
HTTP://WWW.NWS.NOAA.GOV/MDL/SYNOP
IF YOU HAVE ANY QUESTIONS ABOUT THE LAMP GUIDANCE...PLEASE CONTACT:
JUDY GHIRARDELLI
MDL/SILVER SPRING MARYLAND
PHONE: 301-713-0056 EXT. 194
E-MAIL: JUDY.GHIRARDELLI@xxxxxxxx
LINKS TO THE GFS-LAMP PRODUCTS...ALONG WITH DESCRIPTIONS...CAN
BE FOUND AT /USE LOWER CASE LETTERS/:
HTTP://WWW.NWS.NOAA.GOV/MDL/LAMP
THIS AND OTHER NWS TECHNICAL IMPLEMENTATION NOTICES ARE
AVAILABLE AT /USE LOWER CASE LETTERS/:
HTTP://WWW.NWS.NOAA.GOV/OM/NOTIF.HTM
$$
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