NOUS41 KWBC 271453
PNSWSH

SERVICE CHANGE NOTICE 08-54
NATIONAL WEATHER SERVICE HEADQUARTERS WASHINGTON DC
1053 AM EDT WED AUG 27 2008

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

FROM:    GLENN AUSTIN
         CHIEF...HYDROLOGIC SERVICES DIVISION

SUBJECT: NEW FLOOD INUNDATION MAPS IN TEXAS AND LOUISIANA:  
         EFFECTIVE TUESDAY SEPTEMBER 30 2008

EFFECTIVE TUESDAY SEPTEMBER 30 2008 THE NWS AND THE NATIONAL 
OCEAN SERVICE COASTAL SERVICES CENTER WILL BE ADDING NEW FLOOD 
INUNDATION MAPS TO THE ADVANCED HYDROLOGIC PREDICTION SERVICE 
/AHPS/ WEB PORTAL. THESE MAPS WILL PROVIDE INFORMATION FOR  
16 LOCATIONS IN TEXAS AND LOUISIANA. THESE MAPS ARE THE THIRD 
SET RELEASED. THE FIRST SET OF MAPS WAS RELEASED IN OCTOBER 2007 
FOR LOCATIONS IN EASTERN NORTH CAROLINA. THE SECOND SET OF MAPS 
WAS RELEASED IN JUNE 2008 AND COVERED FOUR LOCATIONS IN 
SOUTHEAST TEXAS.

FLOOD INUNDATION MAPS WILL BE AVAILABLE FOR THE FOLLOWING 
LOCATIONS:

     CLEAR CREEK NEAR SANGER TX
     CLEAR FORK TRINITY RIVER AT FORT WORTH TX
     COLORADO RIVER AT AUSTIN TX
     COLORADO RIVER AT BASTROP TX
     COLORADO RIVER AT SMITHVILLE TX
     EAST FORK SAN JACINTO RIVER NEAR NEW CANEY TX
     ONION CREEK AT AUSTIN TX
     OUACHITA RIVER AT MONROE LA
     PALUXY RIVER AT GLEN ROSE TX
     RED RIVER AT ALEXANDRIA LA
     SABINE RIVER AT LOGANSPORT LA
     SAN JACINTO RIVER NEAR SHELDON TX
     SOUTH FORK SAN GABRIEL RIVER AT GEORGETOWN TX
     SPRING CREEK NEAR SPRING TX
     TRINITY RIVER AT DALLAS TX
     WEST FORK TRINITY RIVER AT FORT WORTH TX

THE INUNDATION MAPS PROVIDE INFORMATION ON THE SPATIAL EXTENT 
AND DEPTH OF FLOOD WATERS IN THE VICINITY OF NWS RIVER FORECAST 
LOCATIONS. USERS WILL BE ABLE TO DISPLAY FLOOD INUNDATION MAPS 
FOR VARIOUS LEVELS RANGING FROM MINOR FLOODING THROUGH THE 
LARGEST FLOOD ON RECORD. FLOOD INUNDATION MAPS...COMBINED WITH 
RIVER OBSERVATIONS AND NWS FORECASTS...ENHANCE THE COMMUNICATION 
OF FLOOD RISK AND PROVIDE USERS ADDITIONAL INFORMATION NEEDED TO 
BETTER MITIGATE THE IMPACTS OF FLOODING AND BUILD MORE RESILIENT 
COMMUNITIES.

USERS CAN ACCESS THESE FLOOD INUNDATION MAPS AND ASSOCIATED 
GEOSPATIAL DATA /SHAPEFILES/ THROUGH THE AHPS WEB PORTAL  
/USE LOWER CASE/:

WWW.WEATHER.GOV/AHPS/

A COMPLETE LIST OF FLOOD INUNDATION MAP LOCATIONS IS ONLINE AT 
/USE LOWER CASE/:

WWW.WEATHER.GOV/AHPS/INUNDATION.PHP

A USERS GUIDE FOR THE FLOOD INUNDATION MAP WEB INTERFACE IS 
AVAILABLE AT /USE LOWER CASE/:

   
WWW.WEATHER.GOV/AHPS/INUNDATION/INUNDATION_MAPPING_USER_GUIDE.PDF

IF YOU HAVE ANY QUESTIONS OR COMMENTS...PLEASE CONTACT:

VICTOR HOM
NATIONAL WEATHER SERVICE
NATIONAL INUNDATION MAPPING PROGRAM LEADER
PHONE: 301 713 0006 EXT. 173
E-MAIL: VICTOR.HOM@NOAA.GOV

NWS SERVICE CHANGE NOTICES ARE ONLINE AT /USE LOWER CASE/:

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

$$
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