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000 

WWUS20 KWNS 101514

SEL2

SPC WW 101514

ARZ000-LAZ000-MSZ000-102100-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 292

NWS STORM PREDICTION CENTER NORMAN OK

1010 AM CDT SAT MAY 10 2008



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       SOUTHERN ARKANSAS

       NORTHERN LOUISIANA

       WEST-CENTRAL MISSISSIPPI



EFFECTIVE THIS SATURDAY MORNING AND AFTERNOON FROM 1010 AM UNTIL

400 PM CDT.



TORNADOES...HAIL TO 2 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 80 STATUTE

MILES NORTH AND SOUTH OF A LINE FROM 50 MILES NORTH NORTHWEST OF

TEXARKANA ARKANSAS TO 25 MILES NORTH NORTHEAST OF JACKSON

MISSISSIPPI.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE

ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU2).



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.



DISCUSSION...WELL-DEFINED WARM FRONT CURRENTLY ALONG LA/AR BORDER

EAST TO CNTRL MS WILL CONTINUE TO LIFT NWD ACROSS WATCH AREA INTO

THE AFTERNOON AS INCREASING LARGE SCALE ASCENT SPREADS EAST WITH

STRONG UPPER WAVE. INCREASINGLY MOIST/UNSTABLE AIR MASS WILL FUEL

TSTM DEVELOPMENT WITH SURFACE-BASED SUPERCELLS MOST LIKELY

DEVELOPING ACROSS THE AREA LATER THIS AFTERNOON. SHEAR PROFILES IN

THE WARM SECTOR...AND ESPECIALLY NEAR THE WARM FRONT...ARE FORECAST

TO BE QUITE SUPPORTIVE OF LOW LEVEL STORM ROTATION/MESOCYCLONES WITH

EFFECTIVE SRH VALUES IN SOME AREAS FORECAST TO EXCEED 200 M2/S2.

THUS...A FEW TORNADIC SUPERCELLS APPEAR POSSIBLE WITH ADDITIONAL

THREATS OF LARGE HAIL AND DAMAGING OUTFLOW WINDS.



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

SURFACE AND ALOFT TO 2 INCHES. EXTREME TURBULENCE AND SURFACE

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

450. MEAN STORM MOTION VECTOR 27030.





...CARBIN

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