Public Information Statement

NOUS41 KWBC 241528
PNSWSH		

SERVICE CHANGE NOTICE 09-11
NATIONAL WEATHER SERVICE HEADQUARTERS WASHINGTON DC
1030 AM EST TUE FEB 24 2009

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

FROM:    THERESE Z. PIERCE
      	 MARINE AND COASTAL SERVICES BRANCH CHIEF 

SUBJECT: SERIES OF PROBABILISTIC HURRICANE STORM SURGE PRODUCTS 
         BECOME OPERATIONAL AND EXPAND IN THRESHOLDS: EFFECTIVE
         JUNE 1 2009

THE NWS PROVIDED THE PROBABILITIES OF STORM SURGE FROM 2 TO 10 
FEET...AT ONE FOOT INTERVALS ON AN EXPERIMENTAL BASIS FOR THE 
2008 ATLANTIC HURRICANE SEASON. THE ONLY EXCEPTION WAS THE 
PROBABILITY OF STORM SURGE AT 5 FEET...PROVIDED AS AN 
OPERATIONAL PRODUCT IN 2008.

BASED ON COMMENTS FROM USERS...A NUMBER OF PROBABILISTIC STORM 
SURGE PRODUCTS WILL BECOME OPERATIONAL FOR THE 2009 ATLANTIC 
HURRICANE SEASON.  IN ADDITION...THERE WILL BE AN INCREASE IN 
THE NUMBER OF PRODUCTS PRODUCED. 

SPECIFICALLY...FOR THE 2009 ATLANTIC SEASON...THE NWS WILL ADD 
THE PROBABILITIES OF STORM SURGE OUTPUT FROM 11 TO 25 FEET...AT 
ONE FOOT INTERVALS. THE COMPLETE SUITE OF PRODUCTS...FROM 2 
THROUGH 25 FEET...AT ONE FOOT INTERVALS...IS DEEMED OPERATIONAL 
FOR 2009.   

THESE PROBABILISTIC STORM SURGE PRODUCTS WILL ONLY BE GENERATED 
WHEN HURRICANE WATCHES AND/OR WARNINGS ARE IN EFFECT FOR THE 
ATLANTIC AND GULF COASTS OF THE CONTINENTAL UNITED STATES.
	
WHEN PRODUCED...GRAPHICAL VERSIONS OF THE PRODUCTS WILL BE 
POSTED ONLINE AT /USE LOWER CASE LETTERS/:

      HTTP://WWW.NHC.NOAA.GOV

A COMPREHENSIVE DESCRIPTION AND EXAMPLE OF THE PRODUCTS IS 
POSTED ON LINE AT /USE LOWER CASE LETTERS/:

      HTTP://WWW.NHC.NOAA.GOV/ABOUTNHCGRAPHICS.SHTML

IN ADDITION...GRIB2 FILES OF THE PRODUCTS WILL BE TRANSMITTED ON 
NOAAPORT. THE COMPLETE SUITE OF WMO HEADERS FOR THE GRIDDED 
PRODUCTS FOLLOWS:  

WMO HEADER

LGXT02 KNHC		PROBABILITY OF STORM SURGE GREATER THAN 2 FEET
LGXT03 KNHC		PROBABILITY OF STORM SURGE GREATER THAN 3 FEET
LGXT04 KNHC		PROBABILITY OF STORM SURGE GREATER THAN 4 FEET
LGXT05 KNHC		PROBABILITY OF STORM SURGE GREATER THAN 5 FEET
LGXT06 KNHC		PROBABILITY OF STORM SURGE GREATER THAN 6 FEET
LGXT07 KNHC		PROBABILITY OF STORM SURGE GREATER THAN 7 FEET
LGXT08 KNHC		PROBABILITY OF STORM SURGE GREATER THAN 8 FEET
LGXT09 KNHC		PROBABILITY OF STORM SURGE GREATER THAN 9 FEET
LGXT10 KNHC		PROBABILITY OF STORM SURGE GREATER THAN 10 FEET
LGXT11 KNHC		PROBABILITY OF STORM SURGE GREATER THAN 11 FEET
LGXT12 KNHC		PROBABILITY OF STORM SURGE GREATER THAN 12 FEET
LGXT13 KNHC		PROBABILITY OF STORM SURGE GREATER THAN 13 FEET
LGXT14 KNHC		PROBABILITY OF STORM SURGE GREATER THAN 14 FEET
LGXT15 KNHC		PROBABILITY OF STORM SURGE GREATER THAN 15 FEET
LGXT16 KNHC		PROBABILITY OF STORM SURGE GREATER THAN 16 FEET
LGXT17 KNHC		PROBABILITY OF STORM SURGE GREATER THAN 17 FEET
LGXT18 KNHC		PROBABILITY OF STORM SURGE GREATER THAN 18 FEET
LGXT19 KNHC		PROBABILITY OF STORM SURGE GREATER THAN 19 FEET
LGXT20 KNHC		PROBABILITY OF STORM SURGE GREATER THAN 20 FEET
LGXT21 KNHC		PROBABILITY OF STORM SURGE GREATER THAN 21 FEET
LGXT22 KNHC		PROBABILITY OF STORM SURGE GREATER THAN 22 FEET
LGXT23 KNHC		PROBABILITY OF STORM SURGE GREATER THAN 23 FEET
LGXT24 KNHC		PROBABILITY OF STORM SURGE GREATER THAN 24 FEET
LGXT25 KNHC		PROBABILITY OF STORM SURGE GREATER THAN 25 FEET

THE OUTPUT PROBABILITIES ARE BASED OFF FEET ABOVE THE NATIONAL 
GEODETIC VERTICAL DATUM...COMMONLY ANNOTATED AS NGVD.

IF YOU HAVE ANY QUESTIONS...PLEASE CONTACT: 

TIMOTHY SCHOTT
NATIONAL WEATHER SERVICE
MARINE AND COASTAL SERVICES BRANCH
1325 EAST WEST HIGHWAY ROOM 13124
SILVER SPRING MARYLAND 20910
PHONE: 301-713-1677 EXTENSION 122

THIS AND OTHER SERVICE CHANGE NOTICES ARE AVAILABLE ONLINE AT 
/USE LOWER CASE LETTERS/:

	HTTP://WWW.NWS.NOAA.GOV/OM/NOTIF.HTM

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