

057 

WWUS20 KWNS 060554

SEL0

SPC WW 060554

ARZ000-MSZ000-OKZ000-TXZ000-061100-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 250

NWS STORM PREDICTION CENTER NORMAN OK

1255 AM CDT WED MAY 6 2009



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       SOUTHERN ARKANSAS

       NORTHERN MISSISSIPPI

       MCCURTAIN COUNTY OKLAHOMA

       NORTHEAST TEXAS



EFFECTIVE THIS WEDNESDAY MORNING FROM 1255 AM UNTIL 600 AM 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 40 STATUTE

MILES NORTH AND SOUTH OF A LINE FROM 25 MILES SOUTH SOUTHWEST OF

DE QUEEN ARKANSAS TO 35 MILES EAST SOUTHEAST OF TUPELO

MISSISSIPPI.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE

ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU0).



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 248...WW 249...



DISCUSSION...DISCRETE SUPERCELLS ARE PERSISTING AHEAD OF MAIN MCS

EVOLVING OVER AR EARLY THIS MORNING.  SHEAR REMAINS VERY STRONG AND

WITH INCREASING SURFACE PRESSURE FALLS INTO SRN AR/NRN MS...SURFACE

WARM FRONT SHOULD LIFT NWD OVERNIGHT.  THIS WILL INCREASE THE

POTENTIAL FOR A FEW TORNADOES WITHIN SRN 1/3 OF SVR TSTM WATCH

249...PRIOR TO MAIN POSSIBLY LINEAR MCS PASSAGE LATER THIS MORNING.



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

500. MEAN STORM MOTION VECTOR 28035.





...EVANS

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