Flash Flood Warning 64, NWS Fort Worth, TX

000 
WGUS74 KFWD 111725
FFSFWD

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE FORT WORTH TX
1225 PM CDT FRI SEP 11 2009

TXC027-111830-
/O.CON.KFWD.FF.W.0064.000000T0000Z-090911T1830Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BELL TX-
1225 PM CDT FRI SEP 11 2009

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 130 PM CDT FOR
SOUTHERN BELL COUNTY...

AT 1225 PM CDT...THE STORMS ALONG INTERSTATE 35 AND WESTWARD SOUTH 
OF SALADO CONTINUE TO PRODUCE HEAVY RAINFALL. AN AUTO WAS REPORTED 
STRANDED IN WATER NEAR SALADO. IN NORTHERN WILLIAMSON COUNTY NEAR 
JARRELL ROADS ARE CLOSED AND INTERSTATE 35 TRAFFIC IS NEAR A 
STANDSTILL. RADAR INDICATES THAT ANOTHER 1 TO 3 INCHES WILL BE 
POSSIBLE THROUGH 130 PM CDT.

SOME LOCATIONS THAT WILL CONTINUE TO BE AFFECTED BY HEAVY RAIN 
INCLUDE AREAS ALONG INTERSTATE 35 SOUTH OF SALADO AND WESTWARD TO 
NEAR YOUNGSTOWN.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE WATER COVERS THE ROAD TO
UNKNOWN DEPTHS. IT ONLY TAKES TWO FEET OF RUSHING WATER TO CARRY AWAY
MOST SPORT UTILITY VEHICLES AND PICKUPS. TAKE A DIFFERENT ROUTE TO
REACH YOUR DESTINATION OR WAIT UNTIL THE WATER RECEDES. REMEMBER...
MOST FLOOD RELATED DEATHS OCCUR IN AUTOMOBILES.

HEAVY RAINS FLOOD ROADS AND LOW LYING AREAS RAPIDLY...SO DO NOT DRIVE
YOUR VEHICLE INTO AREAS WHERE WATER OF AN UNKNOWN DEPTH COVERS THE
ROAD. IT ONLY TAKES TWO FEET OF RUSHING WATER TO CARRY AWAY MOST
SPORT UTILITY VEHICLES AND PICKUPS. TAKE A DIFFERENT ROUTE TO REACH
YOUR DESTINATION OR WAIT UNTIL THE WATER RECEDES. REMEMBER...MOST
FLOOD RELATED DEATHS OCCUR IN AUTOMOBILES.

&&

LAT...LON 3086 9762 3090 9776 3105 9771 3099 9741
      3081 9745

$$

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE FORT WORTH TX
647 AM CDT FRI SEP 11 2009

.AVIATION...
MAIN AVIATION WEATHER CONCERNS THROUGH SATURDAY MORNING WILL BE
THE TIMING OF SHOWERS AND THUNDERSTORMS AS WELL AS OCCASIONAL MVFR/IFR
CEILINGS THIS MORNING AND PREVAILING LOW CEILINGS SATURDAY
MORNING.

EXPECT PERIODS OF SHOWERS WITH OCCASIONAL THUNDERSTORMS THIS
MORNING AS THE UPPER LOW OVER SOUTH TEXAS SLOWLY LIFTS NORTHWARD.
BEST THUNDERSTORM CHANCES WILL OCCUR THIS AFTERNOON THROUGH
TONIGHT AS LIFT AND INSTABILITY INCREASE BUT A BRIEF STORM OR TWO
WILL BE POSSIBLE THIS MORNING AT ALL SITES. MVFR CEILINGS SHOULD
IMPROVE OUTSIDE OF THE THUNDERSTORM ACTIVITY THROUGH THE DAY BUT
WILL RETURN OVERNIGHT. SHOWERS AND THUNDERSTORMS MAY DECREASE IN
COVERAGE AFTER SUNSET BUT SHOULD INCREASE IN COVERAGE OVERNIGHT AS
ISENTROPIC LIFT INCREASES.

A LIGHT...MAINLY EAST TO NORTHEAST WIND THIS MORNING WILL TURN
MORE NORTHERLY THIS AFTERNOON AND SHOULD INCREASE AS THE PRESSURE
GRADIENT TIGHTENS.

79

&&

.PREV DISCUSSION... /ISSUED 340 AM CDT FRI SEP 11 2009/
A SOMEWHAT COMPLICATED FORECAST OVER THE NEXT FIVE DAYS. FEEL
THE GFS AND NAM HAVE THE BEST SURFACE AND UPPER AIR SOLUTIONS FOR
OUR REGION. THE ECMWF AND CANADA ARE MUCH SLOWER WITH ALL FEATURES
AND HAVE NOT CHANGED THEIR TONE IN THE PAST SEVERAL RUNS. WITH
SUCH AN UNUSUAL UPPER AIR PATTERN ACROSS NOAM FOR SEPTEMBER...FEEL
SAFER FOLLOWING THE MORE PROGRESSIVE GFS/NAM THROUGH AT LEAST
TUESDAY.

THE UPPER LOW DROPPING OUT OF CANADA WILL DO A REVERSE SHUFFLE
THROUGH THE NORTHERN ROCKIES AND CENTRAL CANADA THROUGH EARLY NEXT
WEEK. WHILE IN THE NORTHERN PLAINS TODAY AND TONIGHT...IT SHOULD
AID FALLING HEIGHTS AND THE FORMATION OF A CLOSE LOW ALOFT OVER
TEXAS WHICH WILL KEEP OUR AREA PRIMED FOR WIDESPREAD CONVECTION
THROUGH THE WEEKEND AND EARLY NEXT WEEK. DOWN AT THE SURFACE...A
TROPICAL CIRCULATION WILL EVOLVE BY TONIGHT SOMEWHERE AROUND
CORPUS CHRISTIE AND START DRIFTING NORTH OR NORTHEASTWARD WITH
COPIOUS AMOUNTS OF MOISTURE. ISENTROPIC SURFACES (300-305) SHOW A
STEADY STREAM OF MOIST UPGLIDE OVER THE EAST AND NORTH SIDE OF
THE SFC-850 LOW AS IT TRACKS ALONG COASTAL TEXAS AND ACROSS EAST
TEXAS. DUE TO THE SLOW MOVEMENT AND EXPECTED HEAVY RAINFALL
THROUGH SUNDAY...WE/VE ISSUED A FLASH FLOOD WATCH FOR ALL OF NORTH
TEXAS THIS AFTERNOON THROUGH SATURDAY NIGHT. AMOUNTS OF 2-4 INCHES
ARE EXPECTED WITH SOME SPOTS RECEIVING MUCH MORE WHERE ECHO TRAINING
AND LONG DURATION RAINFALL OCCURS. THIS EVENT SHOULD BEGIN TO WIND
DOWN MID NEXT WEEK AS THE SURFACE SYSTEM MOVES FURTHER NORTHEAST.

TEMPERATURES WILL BE BELOW NORMAL TODAY THROUGH SUNDAY DUE TO
EXTENSIVE CLOUD COVER...EASTERLY WINDS AND EPISODES OF CONVECTION.
TEMPERATURES MAY NOT RETURN BACK TO NORMAL UNTIL THURSDAY.

75

&&

.PRELIMINARY POINT TEMPS/POPS...
DALLAS-FT. WORTH, TX  84  70  79  67  78 /  60  60  80  70  60
WACO, TX              85  71  80  67  80 /  80  70  80  60  50
PARIS, TX             83  68  76  66  76 /  70  60  80  80  70
DENTON, TX            84  70  79  65  78 /  50  60  80  80  60
MCKINNEY, TX          84  69  79  66  78 /  60  60  80  80  70
DALLAS, TX            85  71  79  68  78 /  60  60  80  70  70
TERRELL, TX           84  70  78  67  77 /  70  70  80  70  60
CORSICANA, TX         83  70  79  67  80 /  70  70  80  70  60
TEMPLE, TX            84  71  78  66  80 /  80  70  70  50  40

&&

.FWD WATCHES/WARNINGS/ADVISORIES...
FLASH FLOOD WATCH FROM 1 PM CDT THIS AFTERNOON THROUGH SUNDAY
MORNING FOR TXZ091>095-100>107-115>123-129>135-141>148-156>162-
174-175.

&&

79/75

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE FORT WORTH TX
345 AM CDT FRI SEP 11 2009

TXZ091>095-100>107-115>123-129>135-141>148-156>162-174-175-121100-
MONTAGUE-COOKE-GRAYSON-FANNIN-LAMAR-YOUNG-JACK-WISE-DENTON-COLLIN-
HUNT-DELTA-HOPKINS-STEPHENS-PALO PINTO-PARKER-TARRANT-DALLAS-
ROCKWALL-KAUFMAN-VAN ZANDT-RAINS-EASTLAND-ERATH-HOOD-SOMERVELL-
JOHNSON-ELLIS-HENDERSON-COMANCHE-MILLS-HAMILTON-BOSQUE-HILL-NAVARRO-
FREESTONE-ANDERSON-LAMPASAS-CORYELL-BELL-MCLENNAN-FALLS-LIMESTONE-
LEON-MILAM-ROBERTSON-
345 AM CDT FRI SEP 11 2009

THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTH TEXAS.

.DAY ONE...TODAY AND TONIGHT.

A FLASH FLOOD WATCH IS IN EFFECT FROM 1 PM THIS AFTERNOON THROUGH
SUNDAY MORNING FOR ALL OF NORTH TEXAS.

NUMEROUS SHOWERS AND THUNDERSTORMS ARE EXPECTED ACROSS ALL OF
NORTH TEXAS TODAY AND TONIGHT. HEAVY RAINFALL AND FLASH FLOODING
WILL BE THE MAIN THREATS WITH THIS ACTIVITY. ORGANIZED SEVERE
THUNDERSTORMS ARE NOT ANTICIPATED.

.DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY.

NUMEROUS SHOWERS AND THUNDERSTORMS ARE EXPECTED SATURDAY THROUGH
MONDAY ACROSS NORTH TEXAS. HEAVY RAINFALL WILL BE THE PRIMARY HAZARD.

SCATTERED THUNDERSTORMS WILL LINGER ACROSS THE NORTHEAST SECTIONS
OF NORTH TEXAS TUESDAY THROUGH THURSDAY.

.SPOTTER INFORMATION STATEMENT...
SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME.

79