Tornado Warning 12, NWS Fort Worth, TX

TXZ091>095-098>107-115>123-129>135-141>148-156>162-174-175-221200-

SEVERE WEATHER OUTLOOK FOR NORTH TEXAS...UPDATED
NATIONAL WEATHER SERVICE FORT WORTH TX
930 PM CDT MON APR 21 1997

THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS THROUGH DAYBREAK
TUESDAY FOR ALL OF NORTH TEXAS.  THE PRIMARY THREAT OF SEVERE WEATHER
WILL BE FROM LARGE HAIL AND DAMAGING STRAIGHT-LINE WINDS.

A SURFACE LOW WAS LOCATED BETWEEN STEPHENVILLE AND WACO LATE MONDAY
EVENING.  A WARM FRONT EXTENDED NORTHEAST OF THIS LOW...THROUGH THE
DALLAS/FT WORTH METROPLEX...THEN EAST INTO EAST TEXAS NEAR MARSHALL.
A DRYLINE EXTENDED SOUTH OF THE LOW INTO THE HILL COUNTRY.  THE
AIRMASS TO THE EAST OF THE DRYLINE AND ALONG AND SOUTH OF THE WARM
FRONT IS MODERATELY UNSTABLE...BUT A LAYER OF WARM AIR SOME 5000 TO
7000 FEET ABOVE THE SURFACE WAS PREVENTING THUNDERSTORM DEVELOPMENT.

A STRONG UPPER LEVEL STORM SYSTEM WAS APPROACHING THE TEXAS
PANHANDLE.  SCATTERED THUNDERSTORMS...A FEW SEVERE...WERE LOCATED
OVER THE NORTHERN PANHANDLE...AND A SEVERE THUNDERSTORM WATCH IS IN
EFFECT UNTIL 300 AM FOR MUCH OF THE PANHANDLE AND A SMALL PORTION OF
SOUTHWESTERN OKLAHOMA.  THIS THUNDERSTORM ACTIVITY IS EXPECTED TO
MOVE SOUTHEAST DURING THE OVERNIGHT HOURS...REACHING THE NORTHWESTERN
PORTIONS OF NORTH TEXAS AROUND 100 AM...FROM A BONHAM TO DALLAS TO
GOLDTHWAITE LINE BY 400 AM...AND FROM A PARIS TO TEMPLE LINE BY
DAYBREAK.

LARGE HAIL AND DAMAGING THUNDERSTORM OUTFLOW WINDS APPEAR TO BE THE
SIGNIFICANT SEVERE WEATHER THREATS.  WHILE THE WIND PROFILE IN THE
LOWEST 5000 FEET OF THE ATMOSPHERE FAVORS AN ORGANIZED CLUSTER OF
STRONG TO OCCASIONALLY SEVERE THUNDERSTORMS...A FEW SUPERCELL
THUNDERSTORMS MAY OCCUR.

LAW ENFORCEMENT OFFICIALS...EMERGENCY MANAGEMENT ORGANIZATIONS...
STORM SPOTTER GROUPS...AND OTHER INTERESTED CONCERNS SHOULD MONITOR
THIS DEVELOPING WEATHER SITUATION AND TAKE NECESSARY ACTIONS SHOULD
SEVERE WEATHER THREATEN YOUR AREA.  ACTIVATION OF STORM SPOTTER
GROUPS MAY BE REQUIRED NORTHWEST OF A MONTAGUE TO EASTLAND LINE
SHORTLY AFTER MIDNIGHT...NORTHWEST OF A BONHAM TO GOLDTHWAITE LINE BY
300 AM...AND NORTHWEST OF A PARIS TO TEMPLE LINE BY 600 AM.

STAY TUNED TO NOAA WEATHER RADIO...LOCJAL RADIO OR TELEVISION
STATIONS...OR YOUR LOCAL CABLE TELEVISION PROVIDER FOR LATER
STATEMENTS CONCERNING THIS POTENTIAL SEVERE WEATHER THREAT.

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