Severe Thunderstorm Warning 620, NWS Fort Worth, TX

TXZ091>167-250000-

SEVERE WEATHER OUTLOOK FOR NORTH TEXAS
NATIONAL WEATHER SERVICE FORT WORTH TX
1250 PM CDT MON JUL 24 1995

THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS THIS AFTERNOON AND
EVENING ACROSS ALL OF NORTH TEXAS.  THIS RISK AREA INCLUDES THE
CITIES OF GRAHAM...ABILENE...SHERMAN...PARIS...THE DALLAS/FORT WORTH
METROPLEX...WACO...TEMPLE...TYLER...LONGVIEW AND LUFKIN.

THE PRIMARY THREAT OF SEVERE WEATHER WILL BE FROM DAMAGING DOWNBURST
WINDS AND LARGE HAIL.

THIS AFTERNOON...AN OUTFLOW BOUNDARY FROM OVERNIGHT THUNDERSTORMS
OVER OKLAHOMA EXTENDED FROM THE RED RIVER NORTH OF SHERMAN WEST
SOUTHWESTWARD TO AN AREA OF LOW PRESSURE WEST OF ABILENE.  TO THE
SOUTH OF THIS BOUNDARY...WARM AND EXTREMELY UNSTABLE AIR WAS IN PLACE
OVER MOST OF NORTH TEXAS.  A CAPPING LAYER OF WARM AIR IN THE MID
LEVELS OF THE ATMOSPHERE WAS SUPPRESSING THUNDERSTORM DEVELOPMENT
OVER MOST OF NORTH TEXAS.

AN UNSEASONABLY STRONG UPPER LEVEL DISTURBANCE OVER THE WESTERN TEXAS
PANHANDLE THIS AFTERNOON IS FORECAST TO MOVE OVER OKLAHOMA AND NORTH
TEXAS LATE THIS AFTERNOON AND TONIGHT.  THIS DISTURBANCE WILL LIFT
AND COOL THE CAPPING LAYER OF WARM AIR...RELEASING THE LOW LEVEL
INSTABILITY.  THUNDERSTORMS MAY DEVELOP ANYWHERE OVER NORTH TEXAS...
BUT THE MOST LIKELY AREA WILL BE OVER NORTHERN PORTIONS OF NORTH
TEXAS...WHERE LOW LEVEL WIND CONVERGENCE ALONG THE OUTFLOW BOUNDARY
IS GREATEST.

THE WIND PROFILE IN THE LOWEST 5000 FEET SUGGESTS THE POSSIBILITY OF
SUPERCELL THUNDERSTORMS...WITH ATTENDANT LARGE HAIL AND DAMAGING
DOWNBURST WINDS.  IN ADDITION...BRIEF TORNADOES ARE POSSIBLE WITH
THESE SUPERCELL STORMS.  AFTER SUNSET...THESE STORMS MAY ORGANIZE
INTO A SQUALL LINE AND MOVE INTO EASTERN PORTIONS OF NORTH TEXAS.
THESE STORMS WILL ALSO BE CAPABLE OF PRODUCING DAMAGING WINDS...LARGE
HAIL...AND AN ISOLATED TORNADO.

STORM SPOTTER GROUPS...LAW ENFORCEMENT AGENCIES...AND EMERGENCY
MANAGEMENT AGENCIES IN NORTHERN AND NORTHWESTERN PORTIONS OF NORTH
TEXAS SHOULD PREPARE FOR POSSIBLE ACTIVATION LATER THIS AFTERNOON.
ACTIVATION MAY ALSO BE NECESSARY OVER CENTRAL AND EASTERN PORTIONS OF
NORTH TEXAS THIS EVENING.

STAY TUNED TO NOAA WEATHER RADIO...OR LOCAL TELEVISION OR RADIO
STATIONS...FOR ADDITIONAL INFORMATION CONCERNING THIS POTENTIAL
SEVERE WEATHER THREAT.

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