Severe Thunderstorm Warning 233, NWS Fort Worth, TX

AREA FORECAST DISCUSSION...UPDATED FOR AVIATION
NATIONAL WEATHER SERVICE FORT WORTH TX
641 PM CDT MON JUL 4 2005

.AVIATION...
DIFFICULT FORECAST THIS EVENING AS SURFACE BOUNDARY ALONG RED RIVER
IS WORKING SE INTO PRETTY UNSTABLE AIR MASS...WITH CONVECTION
DEVELOPING NE OF METROPLEX AIRPORTS. OTHER CU LOOKING MORE
IMPRESSIVE OUT WEST. WILL HOLD OFF ON INCLUDING TSRA IN THE TAF FOR
NOW...BUT MAY HAVE TO ADD THEM FOR THIS EVENING. TSRA CHANCES WILL
LINGER OVERNIGHT AS STORMS OUT WEST MOVE CLOSER TO N TEXAS. SURFACE
FLOW TO SLOWLY BACK TO EAST AROUND 15Z. 80

&&

.DISCUSSION...
350 PM CDT

OUTFLOW LAYER FINALLY MIXING OUT...WITH BOUNDARY TRANSLATING NORTH
OF I-20 CORRIDOR. BOUNDARY TO BE THE FOCUS FOR TSRA DEVELOPMENT
BETWEEN I-20 AND THE RED RIVER...AS ENHANCED SFC CONVERGENCE
COINCIDES WITH ONGOING CONVECTION IN AREA OF CONSIDERABLE MID-
LEVEL INSTABILITY. AREA WELL SOUTH OF BOUNDARY LIKELY TOO CAPPED
DESPITE TREMENDOUS SFC-BASED INSTABILITY.

NOCTURNAL MCS POTENTIAL HIGH WITH INCREASING LLJ OVERNIGHT. WILL
WATCH CONVECTION UPSTREAM FOR LATE NIGHT/EARLY MORNING ARRIVAL.
SEE HWOFWD FOR FURTHER INFORMATION.

TEXAS WILL REMAIN IN WEAKNESS BETWEEN TWO RIDGE BUBBLES...NW FLOW
ALLOWING FOR TSRA CHANCES MUCH OF THE WEAK. DRY GROUND AND
LINGERING SUBSIDENCE WILL KEEP TEMPS WARM...BUT MORE 90S THAN
TRIPLE-DIGITS THE NEXT 7 DAYS. 25

&&

.PRELIMINARY POINT TEMPS/POPS...
DALLAS-FT. WORTH, TX  77  98  76  98 /  40  20  10  10
WACO, TX              77  99  75  98 /  20  20  10  10
PARIS, TX             75  93  73  95 /  50  40  30  30
DENTON, TX            76  98  73  98 /  40  30  20  20
MCKINNEY, TX          76  97  74  98 /  40  30  20  20
DALLAS, TX            79  98  78  98 /  40  20  10  10
TERRELL, TX           76  98  73  97 /  40  20  10  10
CORSICANA, TX         77  98  74  96 /  20  20  10  10
TEMPLE, TX            77  99  75  98 /  20  20  10  10

&&

.FWD WATCHES/WARNINGS/ADVISORIES...
TX...NONE.

&&

05/25

HAZARDOUS WEATHER OUTLOOK FOR NORTH TEXAS
NATIONAL WEATHER SERVICE FORT WORTH TX
710 PM CDT MON JUL 4 2005

TXZ091>095-100>107-115>123-129>135-141>148-156>162-174-175-051100-
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-
710 PM CDT MON JUL 4 2005

THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTH TEXAS.

.DAY ONE...
THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS THIS EVENING ALONG AND
NORTH OF THE I-20 CORRIDOR. DAMAGING DOWNBURST WINDS...AND HAIL TO
THE SIZE OF PENNIES IS POSSIBLE.

THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS OVERNIGHT NORTHWEST OF
A LAMPASAS...HILLSBORO...EMORY LINE. MAIN THREATS WILL BE LARGE
HAIL...LOCALIZED DAMAGING WINDS IN EXCESS OF 60 MPH...AND FREQUENT
CLOUD-TO-GROUND LIGHTNING.

PERSONS ENJOYING OUTDOOR FOURTH OF JULY FESTIVITIES AND THOSE ON AREA
LAKES ACROSS THE RISK AREA TONIGHT NEED TO BE ON THE LOOKOUT FOR
RAPIDLY DEVELOPING...SCATTERED STRONG TO SEVERE STORMS...
PARTICULARLY AS THE EVENING PROGRESSES. A STORM COMPLEX MAY FORM BY
MIDNIGHT AND AFTER AND MOVE SOUTH-SOUTHEAST THROUGH THE INTERSTATE 20
CORRIDOR DURING THE EARLY MORNING HOURS TUESDAY.

.DAYS TWO THROUGH SEVEN...
THUNDERSTORM CHANCES WILL CONTINUE THROUGH THE WEEK...PARTICULARLY
THOSE AREAS BETWEEN INTERSTATE 20 AND THE RED RIVER...AS NORTH TEXAS
WILL CONTINUE TO SEE OCCASIONAL DISTURBANCES ALOFT MOVE ACROSS THIS
AREA. AT THIS TIME...IT IS VERY DIFFICULT TO TIME SUCH FEATURES.
HOWEVER WITH THESE TYPES OF SYSTEMS...AN ISOLATED SEVERE THREAT WITH
LOCALIZED DAMAGING WINDS...LARGE HAIL AND FREQUENT LIGHTNING CANT BE
RULED OUT EACH DAY.

.SPOTTER INFORMATION STATEMENT...
SPOTTER ACTIVATION MAY BE REQUIRED THIS EVENING ALONG AND NORTH OF
THE I-20 CORRIDOR. ACTIVATION MAY BE NEEDED OVERNIGHT ACROSS THE REST
OF NORTH TEXAS NORTHWEST OF A LAMPASAS...HILLSBORO...TO EMORY LINE.

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