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000 

WWUS20 KWNS 080240

SEL6

SPC WW 080240

ARZ000-LAZ000-080800-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 276

NWS STORM PREDICTION CENTER NORMAN OK

935 PM CDT WED MAY 7 2008



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       ARKANSAS

       NORTHERN LOUISIANA



EFFECTIVE THIS WEDNESDAY NIGHT AND THURSDAY MORNING FROM 935 PM

UNTIL 300 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 70 STATUTE

MILES EAST AND WEST OF A LINE FROM 25 MILES NORTHEAST OF FLIPPIN

ARKANSAS TO 10 MILES WEST OF ALEXANDRIA LOUISIANA.  FOR A

COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE

UPDATE (WOUS64 KWNS WOU6).



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 275...



DISCUSSION...IMPRESSIVE LARGE SCALE SYSTEM WILL MAINTAIN WIDESPREAD

STRONG/SEVERE THUNDERSTORMS SPREADING ENEWD ACROSS WW OVERNIGHT.

SHEAR WILL REMAIN QUITE STRONG...ALTHOUGH INSTABILITY FIELDS ARE

MARGINAL...ESPECIALLY INTO CENTRAL/NRN AR WHERE RAIN HAS BEEN

PERSISTENT THIS EVENING.  HOWEVER...INFLUX OF RICHER MOISTURE OUT OF

THE NWRN GULF OF MEXICO AND VERY STRONG/DEEP ASCENT WILL MAINTAIN

THUNDERSTORMS ROOTING NEAR THE BOUNDARY LAYER.  DAMAGING WINDS WILL

BE PRIMARY SEVERE THREAT OVERNIGHT...ALTHOUGH ISOLATED TORNADO

POTENTIAL WILL ALSO PERSIST AS ACTIVITY REMAINS IN PROXIMITY TO

50-60 KT SLY LLJ.



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

400. MEAN STORM MOTION VECTOR 24035.





...EVANS

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