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PNSWSH

TECHNICAL IMPLEMENTATION NOTICE 08-98
NATIONAL WEATHER SERVICE HEADQUARTERS WASHINGTON DC
235 PM EST DEC 22 2008

TO:       SUBSCRIBERS:
          -FAMILY OF SERVICES 
          -NOAA WEATHER WIRE SERVICE
          -EMERGENCY MANAGERS WEATHER INFORMATION NETWORK
          -NOAAPORT 
          OTHER NWS PARTNERS...USERS AND EMPLOYEES

FROM:     JASON TUELL
          CHIEF...SCIENCE PLANS BRANCH
          OFFICE OF SCIENCE AND TECHNOLOGY

SUBJECT:  ADDITION OF MORE LEVELS OF PROBABILISTIC STORM
          SURGE: EFFECTIVE MARCH 24 2009

NOTE: 	  THE FOLLOWING CHANGES HAVE NO IMPACT ON NOAA WEATHER
          WIRE SUBSCRIBERS

EFFECTIVE TUESDAY MARCH 24 2009...BEGINNING WITH THE 1500 
COORDINATED UNIVERSAL TIME /UTC/...THE NWS WILL INCREASE THE 
THRESHOLDS FOR WHICH PROBABILISTIC STORM SURGE IS COMPUTED TO 
INCLUDE PROBABILITY OF SURGE EXCEEDING VALUES FROM 11 TO 25 FEET.  
THESE PRODUCTS ARE ONLY PRODUCED WHEN A HURRICANE WATCH OR 
WARNING IS IN EFFECT FOR THE CONTINENTAL UNITED STATES.

THE PRODUCTS WILL BE AVAILABLE FROM THE FOLLOWING:
-NWS TELECOMMUNICATIONS GATEWAY
-NWS FILE TRANSFER PROTOCOL /FTP/ SERVER /TGFTP/
-NATIONAL DIGITAL GUIDANCE DATABASE /NDGD/
-METEOROLOGICAL DEVELOPMENT LABORATORY /MDL/ WEB PAGES.

THE WMO HEADINGS ARE LISTED BELOW IN TABLE 1:

TABLE 1: PROBABILISTIC STORM SURGE PRODUCTS

WMO HEADING     MEANING

LGXT11 KNHC     PROBABILITY OF SURGE EXCEEDING 11 FEET 
LGXT12 KNHC     PROBABILITY OF SURGE EXCEEDING 12 FEET    
LGXT13 KNHC     PROBABILITY OF SURGE EXCEEDING 13 FEET
LGXT14 KNHC     PROBABILITY OF SURGE EXCEEDING 14 FEET
LGXT15 KNHC     PROBABILITY OF SURGE EXCEEDING 15 FEET
LGXT16 KNHC     PROBABILITY OF SURGE EXCEEDING 16 FEET
LGXT17 KNHC     PROBABILITY OF SURGE EXCEEDING 17 FEET
LGXT18 KNHC     PROBABILITY OF SURGE EXCEEDING 18 FEET
LGXT19 KNHC     PROBABILITY OF SURGE EXCEEDING 19 FEET
LGXT20 KNHC     PROBABILITY OF SURGE EXCEEDING 20 FEET
LGXT21 KNHC     PROBABILITY OF SURGE EXCEEDING 21 FEET
LGXT22 KNHC     PROBABILITY OF SURGE EXCEEDING 22 FEET
LGXT23 KNHC     PROBABILITY OF SURGE EXCEEDING 23 FEET
LGXT24 KNHC     PROBABILITY OF SURGE EXCEEDING 24 FEET
LGXT25 KNHC     PROBABILITY OF SURGE EXCEEDING 25 FEET

THE NDGD LOCATION WILL BE /USE LOWER CASE LETTERS EXCEPT FOR 
SL...ST...DF...DC...GT...AR/:

HTTP://WEATHER.NOAA.GOV/PUB/SL.US008001/ST.EXPR/DF.GR2/DC.NDGD/
GT.SLOSH/AR.CONUS/

OR

FTP://TGFTP.NWS.NOAA.GOV/SL.US008001/ST.EXPR/DF.GR2/DC.NDGD/
GT.SLOSH/AR.CONUS/

SAMPLE PRODUCTS AND ADDITIONAL INFORMATION CAN BE FOUND AT /USE 
LOWERCASE/ 

HTTP://WWW.WEATHER.GOV/MDL/PSURGE/

FOR QUESTIONS ABOUT THESE ADDITIONS...PLEASE CONTACT:

     ARTHUR TAYLOR
     MDL/SILVER SPRING MARYLAND
     301-713-1613 X163
     ARTHUR.TAYLOR@NOAA.GOV

NWS NATIONAL TECHNICAL IMPLEMENTATION NOTICES ARE ONLINE AT  
/USE LOWERCASE/:

  HTTP://WWW.WEATHER.GOV/OS/NOTIF.HTM

$$
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