Flash Flood Warning 169, NWS Fort Worth, TX

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE FORT WORTH TX
551 PM CDT WED JUN 13 2007

.AVIATION...
ISOLATED CONVECTION CONTINUES TO DIE OFF ACROSS THE METROPLEX.
EXPECT MORE SUSTAINABLE CONVECTION TO REMAIN WEST AND EAST OF TAF
SITES. OVERNIGHT SHOULD BE SKC WITH WINDS BECOMING SOUTHERLY.
EXPECT CLOUDS TO INCREASE ALL LEVELS AS UPPER LEVEL LOW APPROACHES
FROM THE NW. SOUTHERLY WINDS WILL BACK TO THE SSE TOMORROW
AFTERNOON WITH A VFR DECK IN PLACE AROUND FL060 AT ALL SITES.

THE UPPER LOW WILL MOVE TOWARDS NORTH TEXAS OVER THE NEXT FEW DAYS
WITH PRECIP CHANCES INCREASING AT ALL TAF SITES. HARD TO PIN DOWN
EXACT TIMING OF RAIN TOMORROW. ETA AND WRF MODELS INDICATE THE
FIRST ROUND MAY COME EARLY IN THE DAY...WITH THE GFS FAVORING THE
AFTERNOON HOURS. HAVE TRIED TO BRIDGE THE DIFFERENCE WITH A TEMP
TSRA IN THE LATE MORNING/EARLY AFTERNOON HOURS. AS FOR WACO...RAIN
CHANCES ARE NOT HIGH ENOUGH TO INCLUDE AS OF YET.  /13

&&

.PREV DISCUSSION... /ISSUED 257 PM CDT WED JUN 13 2007/

DISCUSSION...
SEVERAL AREAS OF CONVECTION HAVE DEVELOPED THIS AFTERNOON. A
BOUNDARY WITH WEAK CONFLUENT SFC FLOW IS PRESENT OVER EAST
TEXAS...ENCOURAGING SCATTERED T-STORM DEVELOPMENT OVER
EAST/NORTHEAST TEXAS...AND INTO EASTERN PORTIONS OF THE METROPLEX.

FARTHER WEST...T-STORMS ARE DEVELOPING ALONG AND JUST AHEAD OF THE
COOL FRONT EXTENDING FROM NEAR THE CENTER OF THE LOW OVER SW
KANSAS...TO WESTERN OK...TO ABILENE AND SAN ANGELO. THIS ACTIVITY
WILL MOVE NORTH-NORTHEAST AND MAY AFFECT OUR WEST/NORTHWEST
COUNTIES THIS EVENING.

WATER VAPOR IMAGERY DEPICTS THE UPPER LOW ALREADY PINCHING OFF
FROM THE MAIN FLOW OVER FAR SE COLORADO. THE CENTER OF THE LOW IS
FORECAST TO WANDER INTO THE TX PANHANDLE AND WESTERN OKLAHOMA
THROUGH FRIDAY...BEFORE MEANDERING SOUTH INTO NORTH TEXAS SATURDAY
AND SUNDAY. THE AREA CAN EXPECT MULTIPLE ROUNDS OF SHOWERS AND
STORMS. ACTIVITY WILL LIKELY BE SCATTERED ONCE AGAIN ON
THURSDAY...WITH INCREASING COVERAGE ON FRIDAY. HOWEVER...THE
GREATEST CHANCES OF RAIN APPEAR TO BE SATURDAY AND SUNDAY AS THE
UPPER LOW SITS OVERHEAD. WIDESPREAD SEVERE WEATHER IS NOT
EXPECTED...BUT COOLER AIR ALOFT WILL STEEPEN LAPSE RATES AND
INCREASE THE HAIL POTENTIAL.

ANOTHER WEEKEND THREAT WILL BE HEAVY RAIN. GFS IS SHOWING INTENSE
TARGETS OF QPF...LIKELY RESULTING FROM CONVECTIVE FEEDBACK.
YET...AMPLE MOISTURE IS PRESENT IN THE COLUMN...WITH PWATS
FORECAST TO BE WELL IN EXCESS OF 1.5 INCHES. FLOW ALOFT WILL BE
WEAK AND TRAINING OF ECHOES WILL BE POSSIBLE. GIVEN THE WEAK
SHEAR...UPDRAFTS SHOULD BE WEAKER AND LESS ORGANIZED...WHICH IS
ALSO ILLUSTRATED BY LONG SKINNY CAPE PRESENT IN FORECAST
SOUNDINGS. THE AFOREMENTIONED CONDITIONS...SEVERAL DAYS OF PRECIP
IN THE FORECAST...AND SOILS THAT ARE RETAINING MOISTURE FROM
EARLIER RAINS WILL RESULT IN A HEAVY RAIN/FLOODING POTENTIAL
ACROSS NORTH TEXAS. IT IS STILL TOO EARLY TO CONSIDER
WATCHES...BUT STAY TUNED AS THIS SYSTEM EVOLVES.

STAGNANT UPPER LOW IS FORECAST TO GET SWEPT OFF TO THE EAST IN
PROGRESSIVE FLOW EARLY NEXT WEEK. A FRONTAL BOUNDARY WILL SAG
TOWARD THE AREA MID WEEK AS A S/WV TROUGH MOVES INTO THE
REGION...BRINGING ANOTHER CHANCE FOR T-STORMS. THETA-E PROGS
SUGGEST THE BOUNDARY MAY HANG UP NEAR THE RED RIVER WED-THURS...
ALLOWING FOR A CONTINUED CHANCE OF STORMS. FOR NOW...WILL CARRY
SLT CHC POPS ON WED...AND KEEP THURS DRY. LATER MODEL RUNS WILL BE
ASSESSED FOR FRONTAL TIMING.

SCHULTZ

&&

.PRELIMINARY POINT TEMPS/POPS...
DALLAS-FT. WORTH, TX  74  91  71  88 /  20  40  40  50
WACO, TX              73  92  71  89 /  20  40  40  50
PARIS, TX             69  89  70  86 /  20  40  40  50
DENTON, TX            72  90  72  88 /  20  40  40  50
MCKINNEY, TX          70  89  70  87 /  20  40  40  50
DALLAS, TX            75  92  73  89 /  20  40  40  50
TERRELL, TX           72  91  72  88 /  20  40  40  50
CORSICANA, TX         72  91  70  89 /  20  40  40  50
TEMPLE, TX            71  92  69  90 /  20  40  40  50

&&

.FWD WATCHES/WARNINGS/ADVISORIES...
NONE.
&&

13/92

HAZARDOUS WEATHER OUTLOOK FOR NORTH TEXAS
NATIONAL WEATHER SERVICE FORT WORTH TX
345 PM CDT WED JUN 13 2007

TXZ091>095-100>107-115>123-129>135-141>148-156>162-174-175-141100-
ANDERSON-BELL-BOSQUE-COLLIN-COMANCHE-COOKE-CORYELL-DALLAS-DELTA-
DENTON-EASTLAND-ELLIS-ERATH-FALLS-FANNIN-FREESTONE-GRAYSON-HAMILTON-
HENDERSON-HILL-HOOD-HOPKINS-HUNT-JACK-JOHNSON-KAUFMAN-LAMAR-LAMPASAS-
LEON-LIMESTONE-MCLENNAN-MILAM-MILLS-MONTAGUE-NAVARRO-PALO PINTO-
PARKER-RAINS-ROBERTSON-ROCKWALL-SOMERVELL-STEPHENS-TARRANT-VAN ZANDT-
WISE-YOUNG-
345 PM CDT WED JUN 13 2007

THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTH TEXAS.

.DAY ONE...
THERE IS A SLIGHT RISK FOR SEVERE STORMS THIS EVENING NORTHWEST OF A
COMANCHE TO GAINESVILLE LINE. HAIL TO THE SIZE OF QUARTERS AND
WIND GUSTS TO 60 MPH WILL BE POSSIBLE WITH A FEW OF THESE STORMS.
OTHERWISE...ISOLATED TO SCATTERED THUNDERSTORMS ARE EXPECTED ACROSS
ALL OF NORTH TEXAS TONIGHT. WIND GUSTS TO 45 MPH...AS WELL AS CLOUD
TO GROUND LIGHTNING AND BRIEF HEAVY RAIN WILL ACCOMPANY SOME OF THESE
STORMS...MAINLY THIS EVENING.

.DAYS TWO THROUGH SEVEN...
THERE WILL BE A CHANCE OF THUNDERSTORMS THROUGH THE WEEKEND...AS AN
UPPER LEVEL DISTURBANCE LINGERS OVER THE AREA. ENOUGH INSTABILITY AND
WIND SHEAR WILL EXIST FOR A FEW SEVERE STORMS TO BECOME SEVERE...
PRODUCING LARGE HAIL AND DAMAGING WINDS. HEAVY RAIN MAY RESULT IN
FLASH FLOODING.

A COLD FRONT WILL MOVE INTO NORTH TEXAS TUESDAY. SCATTERED
THUNDERSTORMS WILL BE POSSIBLE ALONG THE COLD FRONT. TOO MUCH
UNCERTAINTY EXISTS TO ASSESS THE SEVERE WEATHER POTENTIAL THIS FAR
OUT.

.SPOTTER INFORMATION STATEMENT...
LIMITED SPOTTER ACTIVATION MAY BE REQUESTED THROUGH THIS EVENING...
MAINLY NORTHWEST OF A COMANCHE TO GAINESVILLE LINE.

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE FORT WORTH TX
203 PM CDT WED JUN 13 2007

TXZ119-131930-
DALLAS TX-
203 PM CDT WED JUN 13 2007

...SIGNIFICANT WEATHER ADVISORY FOR...
  CENTRAL DALLAS COUNTY

AT 203 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A
STRONG THUNDERSTORM 3 MILES NORTHWEST OF HUTCHINS...DRIFTING
NORTHEAST AT 5 MPH.

CITIES IN THE PATH OF THIS STORM INCLUDE DALLAS AND HUTCHINS.

WIND GUSTS TO 50 MPH AND 1/2 INCH HAIL CAN BE EXPECTED FROM THIS
STORM.

HEAVY RAINFALL MAY RESULT IN FLOODING OF LOW LYING AREAS SUCH AS
DITCHES AND UNDERPASSES. AVOID THESE AREAS AND DO NOT CROSS FLOODED
ROADS AS THEY MAY BE WASHED OUT.

LAT...LON 3264 9682 3262 9671 3280 9665 3281 9677

58

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE FORT WORTH TX
343 PM CDT WED JUN 13 2007

..TIME..    ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE..    ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0342 PM     FLASH FLOOD      DALLAS                  32.79N  96.77W
06/13/2007                   DALLAS             TX   EMERGENCY MNGR

            LOVE FREEWAY AND S. HAMPTON CLOSED DUE TO HIGH WATER.

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE FORT WORTH TX
642 PM CDT WED JUN 13 2007

TXZ094-095-105-106-140015-
LAMAR TX-FANNIN TX-DELTA TX-HUNT TX-
642 PM CDT WED JUN 13 2007

...SIGNIFICANT WEATHER ADVISORY FOR...
  SOUTHEASTERN FANNIN COUNTY
  NORTHEASTERN HUNT COUNTY
  DELTA COUNTY
  SOUTHWESTERN LAMAR COUNTY

AT 642 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A
CLUSTER OF THUNDERSTORMS WITH HEAVY RAINFALL 17 MILES NORTHEAST OF
COMMERCE...MOVING VERY LITTLE.  LOCATION FROM WOLFE CITY NORTHEAST
ALONG THE NORTH SULPHUR RIVER TO BEN FRANKLIN COULD SEE TWO INCHES
OF RAIN BY 740 PM.

CITIES IN THE PATH OF THIS STORM INCLUDE COOPER...WOLFE CITY AND
COOPER LAKE PARK DOCTORS CREEK.

VERY HEAVY RAINFALL...PEA-SIZED HAIL AND WIND GUSTS TO 40 MPH CAN BE
EXPECTED FROM THIS STORM.

THE HEAVY RAINFALL MAY RESULT IN FLOODING OF LOW LYING AREAS SUCH AS
DITCHES...UNDERPASSES...LOW WATER CROSSINGS AND POOR DRAINING
STREETS AND ROADS. AVOID THESE AREAS AND DO NOT CROSS FLOODED ROADS
AS THEY MAY BE WASHED OUT.

LAT...LON 3342 9617 3324 9606 3340 9539 3361 9564