STORM SUMMARY NUMBER 18 FOR THE REMNANTS OF T.D. "ALLISON" 
NATIONAL CENTERS FOR ENVIRONMENTAL PREDICTION
HYDROMETEOROLOGICAL PREDICTION CENTER...NWS...CAMP SPRINGS MD
500 PM EDT SAT JUN 09 2001

THE AREA OF LOW PRESSURE ASSOCIATED WITH THE REMAINS OF "ALLISON"
WAS BECOMING QUITE ELONGATED ALONG A NORTHEAST-SOUTHWEST AXIS...BUT A
CENTER WAS STILL DISCERNIBLE NEAR 29.0N 95.4 W...OR ABOUT 35 MILES WEST-
SOUTHWEST OF GALVESTON...ONLY TEN MILES INLAND OF THE UPPER TEXAS
COAST.  STEERING CURRENTS ARE WEAK...BUT WESTERLY WINDS ALOFT ARE
DRIFTING THE SYSTEM TOWARDS THE EAST AT 5 MPH...WHICH IS EXPECTED TO
CONTINUE OVER THE NEXT 24 HOURS...SENDING IT BACK INTO THE EXTREME
NORTHWESTERN GULF OF MEXICO THIS EVENING. THE ESTIMATED CENTRAL
PRESSURE IS NOW 1008 MB...29.76 INCHES.  MAXIMUM SUSTAINED WINDS ARE 15
TO 20 MPH.

DOPPLER RADAR INDICATED THAT THE BULK OF THE RAINFALL TODAY HAS
FALLEN ACROSS THE MARSHES OF SOUTHERN LOUISIANA...WITH ESTIMATES OF OVER
TEN INCHES NEAR KAPLAN LA SINCE 7 AM CDT. WINNIE TX IS NEAR A SECONDARY
MAXIMUM WITH FIVE INCHES ESTIMATED SINCE 7 AM CDT. RADAR ESTIMATES
OF THE STORM TOTAL OVER THE LAST FIVE DAYS EXCEED 20 INCHES ACROSS THE
LOWER ATCHAFALAYA RIVER IN SOUTH CENTRAL LOUISIANA AND ACROSS THE
HOUSTON METROPOLITAN AREA. AN AREA BETWEEN CONROE AND WILLIS
RECEIVED OVER 20 INCHES DURING FRIDAY NIGHT/SATURDAY MORNING ALONE. 

A MAJOR FLOOD EVENT...MORE PROLIFIC AND INTENSE THAN DURING T.S.
FRANCES IN 1998...IS NOW UNDERWAY ACROSS SOUTHEAST TEXAS AND SOUTHWEST
LOUISIANA. SECTIONS OF I-10 AROUND HOUSTON WERE SO DEEPLY FLOODED
THIS MORNING THAT ONLY THE TOPS OF SEMI-TRACTOR TRAILERS WERE VISIBLE.
REPORTS OF EXTENSIVE FLOODING CONTINUE TO COME IN FROM SOUTHEAST
TEXAS AND SOUTHERN LOUISIANA.  AN ADDITIONAL 4 TO 6 INCHES OF
RAIN...WITH ISOLATED MUCH HEAVIER AMOUNTS... IS LIKELY TO FALL ACROSS EXTREME
SOUTHEASTERN TEXAS AND EXTREME SOUTHWEST LOUISIANA OVER THE NEXT
24 HOURS...WITH LESSER AMOUNTS ACROSS THE REMAINDER OF NORTHERN GULF
COAST.

FLASH FLOOD WATCHES REMAIN FOR THE SOUTHERN TWO-THIRDS OF
LOUISIANA... EXTREME SOUTHWEST MISSISSIPPI...SOUTHEAST TEXAS...AND PORTIONS OF
EAST-CENTRAL AND SOUTH-CENTRAL TEXAS. FLASH FLOOD WARNINGS ARE IN
EFFECT FOR SOUTHEAST TEXAS ACROSS SOUTHERN HARRIS COUNTY THROUGH 6 PM
CDT.  RIVER FLOOD WARNINGS REMAIN IN EFFECT FOR MANY OF THE RIVERS AND
BAYOUS ACROSS EASTERN TEXAS...SOUTHERN LOUISIANA...AND SOUTHWEST
MISSISSIPPI.

SIX HOUR RAINFALL TOTALS INCLUDE:

TEXAS (THROUGH 1 PM CDT, IN INCHES)

CONROE.......................1.13
BEAUMONT/PORT ARTHUR.........1.06

LOUISIANA (TOTAL THROUGH 1 PM CDT, IN INCHES)

PATTERSON....................5.32
SALT POINT...................5.09
LAKE CHARLES.................1.52
NEW IBERIA...................1.09

MISSISSIPPI (THROUGH 1 PM CDT, IN INCHES)

BILOXI.......................0.33
PINE BELT REGIONAL AP........0.24

SELECTED STORM TOTALS FOR ALLISON SINCE TUE 7 AM CDT
(ALL AMOUNTS THROUGH 1 PM CDT UNLESS OTHERWISE NOTED): 

THIBODAUX LA................22.33 (THROUGH 7 AM CDT)
HOUSTON HOBBY TX............20.58
SALT POINT LA...............18.83
BATON ROUGE LA..............18.37
BREAUX BRIDGE LA............18.05 (THROUGH 7 AM CDT)
JACKSON LA..................17.11 (THROUGH 7 AM CDT)
HOUSTON CLOVER FIELD TX.....16.43
BRUSLY 2 W LA...............15.79 (THROUGH 7 AM CDT)
PATTERSON LA................14.83
PONTHCATOULA LA.............14.71 (THROUGH 7 AM CDT)
BAYOU MACHAC LA.............14.33 (THROUGH 7 AM CDT)
LAFAYETTE LA................14.23
MAGNOLIA LA.................14.19 (THROUGH 7 AM CDT)
OAKNOLIA LA.................14.19 (THROUGH 7 AM CDT)
GRETA/TERRYTOWN LA..........14.16 (THROUGH 7 AM CDT)
GLOSTER MS...................8.99 (THROUGH 7 AM CDT)

THE FORECASTERS AT THE NEW ORLEANS...LAKE CHARLES...AND THE HOUSTON/
GALVESTON OFFICES ARE DEEPLY THANKED FOR COMPILING/COORDINATING
RAINFALL AMOUNTS FOR THESE STORM SUMMARIES OVER THE PAST FEW DAYS
DURING EXTRAORDINARY CIRCUMSTANCES.

THE NEXT STORM SUMMARY WILL BE ISSUED AT 11 PM EDT.

ROTH/ FORECAST OPERATIONS BRANCH