Tornado Watch #224

URGENT – IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 224
NWS STORM PREDICTION CENTER NORMAN OK
620 PM CDT WED APR 23 2008

THE NWS STORM PREDICTION CENTER HAS ISSUED A
TORNADO WATCH FOR PORTIONS OF

NORTH CENTRAL TEXAS

EFFECTIVE THIS WEDNESDAY NIGHT AND THURSDAY MORNING FROM 620 PM
UNTIL 200 AM CDT.

TORNADOES…HAIL TO 2.5 INCHES IN DIAMETER…THUNDERSTORM WIND
GUSTS TO 80 MPH…AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE
AREAS.

THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 80 STATUTE
MILES NORTH AND SOUTH OF A LINE FROM 10 MILES NORTH OF
STEPHENVILLE TEXAS TO 50 MILES EAST NORTHEAST OF CORSICANA TEXAS.
FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH
OUTLINE UPDATE (WOUS64 KWNS WOU4).

REMEMBER…A TORNADO WATCH MEANS CONDITIONS ARE FAVORABLE FOR
TORNADOES AND SEVERE THUNDERSTORMS IN AND CLOSE TO THE WATCH
AREA. PERSONS IN THESE AREAS SHOULD BE ON THE LOOKOUT FOR
THREATENING WEATHER CONDITIONS AND LISTEN FOR LATER STATEMENTS
AND POSSIBLE WARNINGS.

OTHER WATCH INFORMATION…CONTINUE…WW 220…WW 221…WW
222…WW 223…

DISCUSSION…SUPERCELL CLUSTER WILL CONTINUE MOVING EWD NEAR
I-20…WITH ADDITIONAL SUPERCELLS AND STORM MERGERS EXPECTED TO THE
E OF THE EXISTING CLUSTER. MLCAPE IN EXCESS 1500 J/KG AND A GRADUAL
INCREASE IN VERTICAL SHEAR THIS EVENING /IN ADVANCE OF A MID LEVEL
TROUGH MOVING OVER W TX/ SHOULD MAINTAIN THE THREAT FOR
SUPERCELLS/BOWS WITH LARGE HAIL…DAMAGING WINDS…AND A COUPLE OF
TORNADOES FOR THE NEXT FEW HOURS.

AVIATION…TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 2.5 INCHES. EXTREME TURBULENCE AND SURFACE
WIND GUSTS TO 70 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO
550. MEAN STORM MOTION VECTOR 27025.

…THOMPSON