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702 

WWUS20 KWNS 251600

SEL1

SPC WW 251600

ARZ000-OKZ000-TXZ000-252300-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 201

NWS STORM PREDICTION CENTER NORMAN OK

1100 AM CDT MON APR 25 2011



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       WESTERN ARKANSAS

       SOUTHEAST OKLAHOMA

       NORTHEAST TEXAS



EFFECTIVE THIS MONDAY MORNING AND EVENING FROM 1100 AM UNTIL 600

PM CDT.



TORNADOES...HAIL TO 3 INCHES IN DIAMETER...THUNDERSTORM WIND

GUSTS TO 70 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE

AREAS.



THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 105 STATUTE

MILES EAST AND WEST OF A LINE FROM 5 MILES EAST SOUTHEAST OF

CORSICANA TEXAS TO 20 MILES WEST NORTHWEST OF FORT SMITH

ARKANSAS.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE

ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU1).



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 199...WW 200...



DISCUSSION...THUNDERSTORMS ARE INTENSIFYING OVER NORTHEAST TX AND

SOUTHEAST OK AS STRONG UPPER TROUGH APPROACHES FROM THE WEST.  A

VERY MOIST AND MODERATELY UNSTABLE AIR MASS IS IN PLACE...WITH ONLY

A WEAK CAP.  FAVORABLE LOW LEVEL AND DEEP LAYER VERTICAL

SHEAR...COMBINED WITH PRESENCE OF SURFACE BOUNDARIES...WILL PROMOTE

SUPERCELL THREAT.  DAMAGING WINDS...VERY LARGE HAIL...AND A FEW

TORNADOES ARE ALL POSSIBLE THROUGH THE AFTERNOON IN THE WATCH AREA.



AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL

SURFACE AND ALOFT TO 3 INCHES. EXTREME TURBULENCE AND SURFACE

WIND GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO

500. MEAN STORM MOTION VECTOR 25040.





...HART

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