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NOUS44 KLUB 031949
PNSLUB

SERVICE CHANGE NOTICE...RESENT
NATIONAL WEATHER SERVICE LUBBOCK TEXAS
144 PM CST FRI FEB 3 2012

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

FROM:    JUSTIN WEAVER
         METEOROLOGIST IN CHARGE
         WEATHER FORECAST OFFICE LUBBOCK TEXAS

SUBJECT: CHANGE IN GAGE ZERO AND FLOOD CATEGORIES FOR THE RIVER GAGE 
         NEAR ASPERMONT ON THE DOUBLE MOUNTAIN FORK BRAZOS RIVER     
         /AMTT2/

ON OCTOBER 3 2011...THE USGS CHANGED THE GAGE ZERO / GAGE DATUM/ 
ELEVATION FOR THE RIVER GAGE NEAR ASPERMONT ON THE DOUBLE MOUNTAIN 
FORK OF THE BRAZOS RIVER FROM 1624.79 FEET ABOVE NATIONAL GEODETIC 
VERTICAL DATUM OF 1929 /NGVD 29/ TO 1619.79 FEET ABOVE THAT SAME 
DATUM. FOR THIS LOCATION...GAGE ZERO WAS LOWERED 5.0 FEET BECAUSE 
THE BOTTOM OF THE RIVER CHANNEL HAD SCOURED SUCH THAT THE WATER 
SURFACE WAS FREQUENTLY BELOW THE ZERO MARK OF THE GAGE.  THE GAGE 
REMAINED AT THE SAME PHYSICAL LOCATION.

EFFECTIVE MARCH 5 2012...DUE TO THE CHANGE IN THE GAGE DATUM AND ALSO
DUE TO LAND USE CHANGES...FLOOD STAGE AND FLOOD CATEGORIES CITED IN 
NWS FORECAST PRODUCTS FOR THE DOUBLE MOUNTAIN FORK BRAZOS RIVER NEAR 
ASPERMONT 10S WILL BE CHANGED AS FOLLOWS:

1.  ACTION STAGE WILL BE 19.0 FEET ABOVE GAGE ZERO. PREVIOUS ACTION  
    STAGE WAS 7.0 FEET ABOVE GAGE ZERO.

2.  FLOOD STAGE WILL BE 21.0 FEET ABOVE GAGE ZERO. PREVIOUS FLOOD    
    STAGE WAS 8.0 FEET ABOVE GAGE ZERO. 

3.  MODERATE FLOOD STAGE WILL BE 35.0 FEET ABOVE GAGE ZERO. PREVIOUS 
    MODERATE FLOOD STAGE WAS 30.0 FEET ABOVE GAGE ZERO.

4.  MAJOR FLOOD STAGE WILL BE 41.0 FEET ABOVE GAGE ZERO. PREVIOUS    
    MAJOR FLOOD STAGE WAS 32.0 FEET ABOVE GAGE ZERO.

OBSERVATIONS AND FORECASTS WILL REMAIN AS STAGE REPORTS IN FEET 
ABOVE GAGE ZERO FOR THE STREAM GAGE AT ASPERMONT 10S ON THE DOUBLE 
MOUNTAIN FORK OF THE BRAZOS RIVER AND CAN BE USED BY PERSONS IN 
SOUTHERN STONEWALL COUNTY.  

THE NATIONAL WEATHER SERVICE WELCOMES PUBLIC FEEDBACK.  IF YOU HAVE 
ANY QUESTIONS OR COMMENTS ON THIS CHANGE...PLEASE CONTACT:

        JOHN LIPE
        SENIOR SERVICE HYDROLOGIST
        NATIONAL WEATHER SERVICE FORECAST OFFICE
        2579 S. LOOP 289, SUITE 100
        LUBBOCK TEXAS
        806-745-3916 EXT 228
        E-MAIL: JOHN.LIPE@NOAA.GOV

$$