000 NOUS41 KWBC 181746 PNSWSH SERVICE CHANGE NOTICE 05-38 NATIONAL WEATHER SERVICE HEADQUARTERS WASHINGTON DC 145 PM EDT TUE OCT 18 2005 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...AND FEDERAL AVIATION ADMINISTRATION /FAA/ CUSTOMERS FROM: ELI JACKS CHIEF...FIRE AND PUBLIC WEATHER SERVICES BRANCH SUBJECT: REMOVAL OF OBSOLETE LATITUDE/LONGITUDE INFORMATION FROM THE STORM PREDICTION CENTER PUBLIC WATCH PRODUCT /SEL/ AND ADDITION OF ENHANCED LATITUDE/LONGITUDE INFORMATION IN THE AVIATION WATCH PRODUCT /SAW/: EFFECTIVE FEBRUARY 14 2006 EFFECTIVE TUESDAY... FEBRUARY 14 2006 AT 800 AM CENTRAL STANDARD TIME /CST/...900 AM EASTERN STANDARD TIME /EST/...1400 UNIVERSAL COORDINATED TIME /UTC/...NWS WILL MAKE CHANGES TO ITS PUBLIC WATCH PRODUCT /SEL/ AND AVIATION WATCH PRODUCT /SAW/. LATITUDE AND LONGITUDE INFORMATION AT THE BOTTOM OF THE SPC PUBLIC WATCH PRODUCT...WWUS20 KWNS SELX /X REPRESENT A NUMBER/...WILL BE REMOVED. ENHANCED LATITUDE AND LONGITUDE INFORMATION WILL BE ADDED NEAR THE BOTTOM OF THE SPC AVIATION WATCH PRODUCT...WWUS30 KWNS SAWX /X REPRESENT A NUMBER/. CUSTOMERS WHO BEGIN USING THE LAT-LON INFORMATION IN THE SAW PRODUCT COULD AT A LATER TIME STOP USING THE SPC WATCH ANCHOR POINTS OR VHF OMNI-DIRECTIONAL RANGE /VOR/ POINTS TO DECODE OR PROCESS THE WATCH. BY PROCESSING LAT-LON DATA...INSTEAD OF THE ANCHOR POINTS OR VOR POINTS... CUSTOMERS DO NOT HAVE TO KEEP THE WATCH ANCHOR POINTS OR VOR POINTS DATABASE IN SYNC WITH THE NWS DATABASE. AN EXAMPLE OF A PUBLIC WATCH PRODUCT FOLLOWS IN TABLE 1. AN EXAMPLE OF LATITUDE AND LONGITUDE FORMAT AND LOCATION IN THE SAW PRODUCT FOLLOWS IN TABLE 2. TABLE 1. AN EXAMPLE OF THE CURRENT FORMAT OF THE SEL PRODUCT. THE FUTURE SEL PRODUCT WILL NOT CONTAIN THE FOLLOWING LINE: ;370,1030 395,0992 395,0970 370,1005; WWUS20 KWNS 171510 SEL4 SPC WW 171510 COZ000-KSZ000-172300- URGENT - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WATCH NUMBER 1234 NWS STORM PREDICTION CENTER NORMAN OK 1010 AM CDT MON OCT 17 2005 THE NWS STORM PREDICTION CENTER HAS ISSUED A SEVERE THUNDERSTORM WATCH FOR PORTIONS OF COLORADO KANSAS EFFECTIVE THIS MONDAY MORNING AND EVENING FROM 1010 AM UNTIL 600 PM CDT. HAIL TO 2 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS TO 70 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS. THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 60 STATUTE MILES EAST AND WEST OF A LINE FROM 55 MILES WEST OF LIBERAL KANSAS TO 80 MILES NORTH NORTHEAST OF RUSSELL KANSAS. FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU4). REMEMBER...A SEVERE THUNDERSTORM WATCH MEANS CONDITIONS ARE FAVORABLE FOR SEVERE THUNDERSTORMS IN AND CLOSE TO THE WATCH AREA. PERSONS IN THESE AREAS SHOULD BE ON THE LOOKOUT FOR THREATENING WEATHER CONDITIONS AND LISTEN FOR LATER STATEMENTS AND POSSIBLE WARNINGS. SEVERE THUNDERSTORMS CAN AND OCCASIONALLY DO PRODUCE TORNADOES. DISCUSSION...FORECASTER DISCUSSION WOULD GO HERE. AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT TO 2 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500. MEAN STORM MOTION VECTOR 24035. ...SPC ;370,1030 395,0992 395,0970 370,1005; END OF EXAMPLE TABLE 2. BELOW IS AN EXAMPLE SAW PRODUCT WITH LAT-LON DATA EFFECTIVE FEBRUARY 14 2006. /THE CURRENT SAW FORMAT DOES NOT INCLUDE THE LAT-LON LINE/. WWUS30 KWNS 171510 SAW4 SPC AWW 171510 WW 1234 SEVERE TSTM CO KS 171510Z - 172300Z AXIS..60 STATUTE MILES EAST AND WEST OF LINE.. 55W LBL/LIBERAL KS/ - 80NNE RSL/RUSSELL KS/ ..AVIATION COORDS.. 50NM E/W /48W LBL - 67NNW SLN/ HAIL SURFACE AND ALOFT..2 INCHES. WIND GUSTS..60 KNOTS. MAX TOPS TO 500. MEAN STORM MOTION VECTOR 24035. LAT...LON 37020305 39929936 39929711 37020088 THIS IS AN APPROXIMATION TO THE WATCH AREA. FOR A COMPLETE DEPICTION OF THE WATCH SEE WOUS64 KWNS FOR WOU4. END OF EXAMPLE. THE LATITUDE AND LONGITUDE DEPICT THE SAME INFORMATION AS THE WATCH ANCHOR POINT AND VOR DEPICTION OF THE PARALLELOGRAM WATCH AREA. PLEASE NOTE THE AREA DEPICTED BY THE LAT-LON...ANCHOR POINTS...AND VOR POINTS IS A COARSE APPROXIMATION OF THE WATCH AREA. THE ACTUAL WATCH AREA IS DEFINED IN THE WATCH OUTLINE UPDATE PRODUCT...WOUS64 KWNS WOUX /X REPRESENT A NUMBER/. THE LAT-LON DATA FORMAT IS SIMILAR TO THE SPC PTSDY1...PTSDY2 AND PTSDY3 PRODUCTS. IF THE LONGITUDE IS GREATER THAN OR EQUAL TO 100 THEN THE VALUE HAS THE 1 /ONE/ TRUNCATED/REMOVED AND THE REMAINDER OF THE VALUE IS PLACED IN THE PRODUCT. FOUR DIGITS REPRESENT EACH LATITUDE AND LONGITUDE TO THE HUNDREDTHS OF A DEGREE DECIMAL. IF FEBRUARY 14 IS A CRITICAL WEATHER DAY... THE CHANGE WILL BE DELAYED FOR 24 HOURS. CUSTOMERS MUST TAKE APPROPRIATE ACTION IF THEY CURRENTLY DECODE THE LAT-LON INFORMATION AT THE BOTTOM OF THE WWUS20 KWNS SELX /X REPRESENT A NUMBER/ PRODUCT...OR CURRENTLY DECODE THE SAW PRODUCT. ADDITIONAL INFORMATION ON SPC PRODUCTS CAN BE FOUND IN THE NWS DIRECTIVE 10-512 LOCATED AT /USE LOWER CASE LETTERS/: HTTP://WWW.NWS.NOAA.GOV/DIRECTIVES/010/PD01005012.PDF IF YOU HAVE QUESTIONS...PLEASE CONTACT: MARK TEW GREGORY GROSSHANS NATIONAL WEATHER SERVICE STORM PREDICTION CENTER 1325 EAST WEST HIGHWAY NATIONAL WEATHER SERVICE SILVER SPRING MD 20910 1313 HALLEY CIRCLE 301-713-1867 EXT.103 NORMAN OK 70707 MARK.TEW@NOAA.GOV 405-579-0720 GREGORY.GROSSHANS@NOAA.GOV THIS AND OTHER NWS SERVICE CHANGE NOTICES ARE AVAILABLE ONLINE AT /USE LOWER CASE LETTERS/: HTTP://WWW.NWS.NOAA.GOV/OM/NOTIF.HTM $$ NNNN