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Significant Rains Later Today through Sunday with Enhanced Flooding Risk

An abundance of moisture will pool along a stationary front across South and Southeast Texas this weekend. This stationary front will provide an area of lift which will promote precipitation. Widespread heavy rains are expected from later today through Sunday across Southwest, South, Deep South, Southeast, and East Texas in addition to the Texas Hill Country and Brazos Valley. Widespread rain accumulations of 1.5 to 4 inches will be possible. Isolated heavier rain totals up to 6 and possibly even 8 inches will be possible. Most of South-Central into Southeast and East Texas have received several inches of rain this month. The ground won’t be able to absorb as much water as we saw with previous rain events. Anything over 3-4 inches cold certainly create a runoff issue and result in flash flooding. A Flash Flood Watch is in effect later today through late Saturday Night or in some cases Sunday for Southwest Texas, South-Central Texas, Deep South Texas, portions of Central Texas, Southeast Texas, and East Texas.

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2015-03-20_4-35-42

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2015-03-20_4-36-39

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…A FLASH FLOOD WATCH IS IN EFFECT FOR THE BIG BEND…DAVIS/APACHE
MOUNTAINS…MARFA PLATEAU…PRESIDIO VALLEY AND LOWER TRANS PECOS
BEGINNING TONIGHT THROUGH THE DAY SATURDAY…

.AN UPPER LEVEL STORM SYSTEM TO OUR WEST WILL LIFT ACROSS THE AREA
TONIGHT AND SATURDAY. WIDESPREAD HEAVY RAIN WILL DEVELOP ACROSS
NORTHERN MEXICO AND THE PRESIDIO VALLEY TONIGHT AND SPREAD EAST
AND NORTH DURING THE DAY SATURDAY. A SATURATED GROUND DUE TO
RECENT RAINS AND MORE HEAVY RAIN WILL INCREASE THE POTENTIAL FOR
FLASH FLOODING. IN GENERAL…RAINFALL OF 1 TO 2 INCHES WITH LOCALLY
HIGHER AMOUNTS WILL BE POSSIBLE. HEAVY RAIN WILL LIKELY PRODUCE
RUNOFF RESULTING IN FLASH FLOODING OF AREAS PRONE TO FLOODING.
RAINFALL SHOULD END BY SATURDAY EVENING…HOWEVER AREAS OF
FLOODING MAY CONTINUE INTO EARLY NEXT WEEK.

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TXZ074-075-079>082-202300-
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/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
DAVIS/APACHE MOUNTAINS AREA-PECOS-PRESIDIO VALLEY-MARFA PLATEAU-
BIG BEND AREA-TERRELL-
INCLUDING THE CITIES OF…ALPINE…FORT STOCKTON…PRESIDIO…
MARFA…MARATHON…SANDERSON
429 AM CDT FRI MAR 20 2015

…FLASH FLOOD WATCH IN EFFECT FROM LATE TONIGHT THROUGH SATURDAY
EVENING…

* FROM LATE TONIGHT THROUGH SATURDAY EVENING

* WIDESPREAD 1 TO 2 INCHES WITH LOCALLY HIGHER AMOUNTS.

_____________________________

FREESTONE-ANDERSON-BELL-FALLS-LIMESTONE-LEON-MILAM-ROBERTSON-
INCLUDING THE CITIES OF…TEAGUE…FAIRFIELD…PALESTINE…
KILLEEN…TEMPLE…FORT HOOD…MARLIN…MEXIA…GROESBECK…
BUFFALO…CENTERVILLE…JEWETT…OAKWOOD…CAMERON…ROCKDALE…
HEARNE…FRANKLIN…CALVERT
401 AM CDT FRI MAR 20 2015

…FLASH FLOOD WATCH IN EFFECT FROM 1 PM CDT THIS AFTERNOON
THROUGH SUNDAY MORNING…

THE NATIONAL WEATHER SERVICE IN FORT WORTH HAS ISSUED A

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* FLASH FLOOD WATCH FOR PORTIONS OF NORTH CENTRAL TEXAS…
NORTHEAST TEXAS AND SOUTH CENTRAL TEXAS…INCLUDING THE
FOLLOWING AREAS…IN NORTH CENTRAL TEXAS…BELL…FALLS…
FREESTONE AND LIMESTONE. IN NORTHEAST TEXAS…ANDERSON AND
LEON. IN SOUTH CENTRAL TEXAS…MILAM AND ROBERTSON.

* FROM 1 PM CDT THIS AFTERNOON THROUGH SUNDAY MORNING.

* WIDESPREAD MODERATE TO HEAVY RAINFALL IS EXPECTED TO DEVELOP
LATER THIS EVENING ALONG AND BEHIND A COLD FRONT AND CONTINUE
THROUGH LATE SATURDAY.

* AMOUNTS: 1 TO 3 INCHES WITH LOCALLY HIGHER AMOUNTS IN EXCESS OF
4 INCHES THROUGH LATE SATURDAY.

________________________

…HEAVY RAINFALL EXPECTED THIS AFTERNOON THROUGH LATE
SATURDAY…

.A SLOW MOVING COLD FRONT WILL INTERACT WITH A DEEP PLUME OF
PACIFIC MOISTURE TO PRODUCE MULTIPLE ROUNDS OF SHOWERS AND
THUNDERSTORMS ACROSS SOUTH CENTRAL TEXAS THIS AFTERNOON THROUGH
SATURDAY EVENING. LOW WATER CROSSINGS AND AREAS PRONE TO FLOODING
WILL BE AT RISK OF BEING IMPACTED WITH ROADS POSSIBLY IMPASSABLE
IN SOME LOCATIONS. THE HEAVIEST RAINFALL IS EXPECTED THIS
AFTERNOON THROUGH SATURDAY MORNING. THE RISK FOR HEAVY RAINFALL
AND FLASH FLOODING WILL DIMINISH SATURDAY EVENING.

TXZ171>173-186>194-203>209-218>225-228-202100-
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/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
LLANO-BURNET-WILLIAMSON-KERR-BANDERA-GILLESPIE-KENDALL-BLANCO-
HAYS-TRAVIS-BASTROP-LEE-UVALDE-MEDINA-BEXAR-COMAL-GUADALUPE-
CALDWELL-FAYETTE-ZAVALA-FRIO-ATASCOSA-WILSON-KARNES-GONZALES-
DE WITT-LAVACA-DIMMIT-
INCLUDING THE CITIES OF…LLANO…BURNET…GEORGETOWN…
KERRVILLE…BANDERA…FREDERICKSBURG…BOERNE…BLANCO…
SAN MARCOS…AUSTIN…BASTROP…GIDDINGS…UVALDE…HONDO…
SAN ANTONIO…NEW BRAUNFELS…SEGUIN…LOCKHART…LA GRANGE…
CRYSTAL CITY…PEARSALL…PLEASANTON…FLORESVILLE…
KARNES CITY…GONZALES…CUERO…HALLETTSVILLE…CARRIZO SPRINGS
437 AM CDT FRI MAR 20 2015

…FLASH FLOOD WATCH NOW IN EFFECT FROM 1 PM CDT THIS AFTERNOON
THROUGH SATURDAY EVENING…

THE FLASH FLOOD WATCH IS NOW IN EFFECT FOR

* A PORTION OF SOUTH CENTRAL TEXAS…INCLUDING THE FOLLOWING
AREAS…ATASCOSA…BANDERA…BASTROP…BEXAR…BLANCO…
BURNET…CALDWELL…COMAL…DE WITT…DIMMIT…FAYETTE…
FRIO…GILLESPIE…GONZALES…GUADALUPE…HAYS…KARNES…
KENDALL…KERR…LAVACA…LEE…LLANO…MEDINA…TRAVIS…
UVALDE…WILLIAMSON…WILSON AND ZAVALA.

* FROM 1 PM CDT THIS AFTERNOON THROUGH SATURDAY EVENING

* WIDESPREAD 2 TO 4 INCHES OF RAINFALL WITH ISOLATED TOTALS OF 6
TO 7 INCHES FROM SLOW MOVING AND TRAINING THUNDERSTORMS.

* RAPID RUNOFF FROM HEAVY RAINFALL WILL LIKELY RESULT IN FLASH
FLOODING OF CREEKS AND STREAMS…LOW WATER CROSSINGS…AND
URBAN AREAS NORMALLY SUBJECT TO FLOODING. RECENT RAINFALL
ALONG AND EAST OF INTERSTATE 35 OVER THE PAST FEW WEEKS HAS
LED TO SATURATED SOILS WHICH MAY CAUSE FLASH FLOODING TO OCCUR
WITH LESS RAINFALL THAN USUAL…POSING AN ELEVATED THREAT TO
LIFE AND PROPERTY.

____________________________

AUSTIN-BRAZOS-BURLESON-COLORADO-GRIMES-HOUSTON-MADISON-MONTGOMERY-
POLK-SAN JACINTO-TRINITY-WALKER-WALLER-WASHINGTON-
INCLUDING THE CITIES OF…BELLVILLE…BRENHAM…BROOKSHIRE…
BRYAN…CALDWELL…COLDSPRING…COLLEGE STATION…COLUMBUS…
CONROE…CORRIGAN…CROCKETT…EAGLE LAKE…GROVETON…
HEMPSTEAD…HUNTSVILLE…LAKE SOMERVILLE…LIVINGSTON…
MADISONVILLE…NAVASOTA…ONALASKA…PRAIRIE VIEW…SEALY…
SHEPHERD…THE WOODLANDS…TRINITY…WEIMAR…WILLIS
333 AM CDT FRI MAR 20 2015

…FLASH FLOOD WATCH IN EFFECT FROM NOON CDT TODAY THROUGH
SATURDAY EVENING…

THE NATIONAL WEATHER SERVICE IN HOUSTON/GALVESTON HAS ISSUED A

* FLASH FLOOD WATCH FOR A PORTION OF SOUTHEAST TEXAS…INCLUDING
THE FOLLOWING COUNTIES…AUSTIN…BRAZOS…BURLESON…
COLORADO…GRIMES…HOUSTON…MADISON…MONTGOMERY…POLK…
SAN JACINTO…TRINITY…WALKER…WALLER AND WASHINGTON.

* FROM NOON CDT TODAY THROUGH SATURDAY EVENING

* DISTURBANCES MOVING UP AHEAD OF A NORTHWESTERN MEXICO UPPER
TROUGH WILL ENTER AN UNSTABLE AND VERY MOIST SOUTHEASTERN TEXAS
AIR MASS TODAY INTO TOMORROW. THESE DISTURBANCES WILL PROVIDE
ENOUGH LIFT TO GENERATE PERIODS OF RAINFALL…LOCALLY HEAVY…
ACROSS THE WATCH AREA. PRECEDENT SATURATED GROUND WILL INHIBIT
RAINFALL TO DRAIN INTO THE LOWER SOIL LEVELS…INCREASING THE
THREAT FOR ENHANCED RUNOFF LEADING TO FLOODING.

* POTENTIAL IMPACTS OF FLOODING WOULD BE WATER OVER ROADWAYS AND
SWOLLEN RIVERS AND THEIR TRIBUTARIES COMING OUT OF BANKS.

__________________________________

…FLASH FLOOD WATCH IS IN EFFECT FOR PORTIONS OF NORTHEAST
TEXAS…FOR DEEP EAST TEXAS AND FOR NORTHWEST LOUISIANA FROM 4 PM
CDT TONIGHT UNTIL 7 AM SUNDAY MORNING…

.THE COMBINATION OF RICH DEEP LAYER MOISTURE…A STALLED FRONTAL
BOUNDARY AND A SLOW MOVING UPPER TROUGH WILL RESULT IN A LARGE
AREA OF SHOWERS AND THUNDERSTORMS DEVELOPING LATER TODAY AND
CONTINUING INTO SATURDAY DAY AND NIGHT ACROSS THE REGION. SOILS
ARE STILL SATURATED AND MANY RIVERS AND STREAMS ARE STILL NEAR OR
ABOVE FLOOD STAGE DUE TO OTHER HEAVY RAINFALL EVENTS DURING THE
LAST FEW WEEKS. THESE CONDITIONS COMBINED WITH AN ADDITIONAL TWO TO
FOUR INCHES OF RAINFALL MAY LEAD TO A RENEWED THREAT FOR FLASH
FLOODING OVER THE WEEKEND.

LAZ001>005-010>013-017>019-TXZ136>138-149>153-165>167-201800-
/O.EXB.KSHV.FF.A.0004.150320T2100Z-150322T1200Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
CADDO-BOSSIER-WEBSTER-CLAIBORNE-LINCOLN-DE SOTO-RED RIVER-
BIENVILLE-JACKSON-SABINE-NATCHITOCHES-WINN-SMITH-GREGG-HARRISON-
CHEROKEE-RUSK-PANOLA-NACOGDOCHES-SHELBY-ANGELINA-SAN AUGUSTINE-
INCLUDING THE CITIES OF…SHREVEPORT…BOSSIER CITY…MINDEN…
SPRINGHILL…HOMER…HAYNESVILLE…RUSTON…MANSFIELD…
STONEWALL…LOGANSPORT…COUSHATTA…MARTIN…ARCADIA…
RINGGOLD…GIBSLAND…JONESBORO…MANY…ZWOLLE…PLEASANT HILL…
NATCHITOCHES…WINNFIELD…TYLER…LONGVIEW…MARSHALL…
JACKSONVILLE…RUSK…HENDERSON…CARTHAGE…NACOGDOCHES…
CENTER…LUFKIN…SAN AUGUSTINE…HEMPHILL…PINELAND
459 AM CDT FRI MAR 20 2015

…FLASH FLOOD WATCH IN EFFECT FROM 4 PM CDT THIS AFTERNOON
THROUGH SUNDAY MORNING…

THE NATIONAL WEATHER SERVICE IN SHREVEPORT HAS EXPANDED THE

* FLASH FLOOD WATCH TO INCLUDE PORTIONS OF LOUISIANA AND TEXAS…
INCLUDING THE FOLLOWING AREAS…IN LOUISIANA…BIENVILLE…
BOSSIER…CADDO…CLAIBORNE…DE SOTO…JACKSON…LINCOLN…
NATCHITOCHES…RED RIVER…SABINE…WEBSTER AND WINN. IN
TEXAS…ANGELINA…CHEROKEE…GREGG…HARRISON…NACOGDOCHES…
PANOLA…RUSK…SABINE…SAN AUGUSTINE…SHELBY AND SMITH.

* FROM 4 PM CDT THIS AFTERNOON THROUGH SUNDAY MORNING

* A LARGE AREA OF SHOWERS AND THUNDERSTORMS IS EXPECTED TO BRING
TWO TO FOUR INCHES OF RAINFALL TO THE WATCH AREA OVER THE NEXT
48 HOURS. THIS HEAVY RAINFALL WILL OCCUR OVER AREAS THAT
ALREADY HAVE SATURATED SOILS FROM PREVIOUS HEAVY RAIN EVENTS…
LEADING TO A THREAT FOR FLASH FLOODING.

* FLASH FLOODING IN LOW LYING AND POOR DRAINAGE AREAS MAY MAKE
SOME ROADWAYS AND UNDERPASSES IMPASSIBLE. RAPID WATER LEVEL
INCREASES IN SMALL STREAMS…CREEKS AND BAYOUS MAY ALSO OCCUR.

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David Reimer

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