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000 

WWUS20 KWNS 172252

SEL5

SPC WW 172252

ARZ000-OKZ000-TXZ000-180600-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 125

NWS STORM PREDICTION CENTER NORMAN OK

550 PM CDT MON MAR 17 2008



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       WESTERN ARKANSAS

       EASTERN OKLAHOMA

       NORTHEAST TEXAS



EFFECTIVE THIS MONDAY AFTERNOON AND TUESDAY MORNING FROM 550 PM

UNTIL 100 AM CDT.



TORNADOES...HAIL TO 1.5 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 75 STATUTE

MILES EAST AND WEST OF A LINE FROM 35 MILES NORTHEAST OF POTEAU

OKLAHOMA TO 25 MILES SOUTHWEST OF TYLER TEXAS.  FOR A COMPLETE

DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE UPDATE

(WOUS64 KWNS WOU5).



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 124...



DISCUSSION...TSTMS THAT HAVE FORMED IN THE PAST HALF HOUR OVER NE TX

APPEAR TO BE RELATED TO HEATING AND TO CHANGES IN LOW-LEVEL

JET/CONVERGENCE FIELDS ASSOCIATED WITH THE DEVELOPMENT OF HIGH-LEVEL

JET ENTRANCE REGION OVER ERN KS.  GIVEN 50+ KT SSWLY DEEP

SHEAR...ENHANCED LOW-LEVEL DIRECTIONAL SHEAR INVOF WARM FRONT ATTM

LOCATED JUST S OF THE RED RIVER...AND INCREASING MOISTURE

INFLOW...POTENTIAL WILL EXIST FOR A FEW DISCRETE SUPERCELLS/POSSIBLE

TORNADOES.



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

SURFACE AND ALOFT TO 1.5 INCHES. EXTREME TURBULENCE AND SURFACE

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

500. MEAN STORM MOTION VECTOR 22035.





...CORFIDI

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