

000 

WWUS20 KWNS 102352

SEL9

SPC WW 102352

ARZ000-MOZ000-MSZ000-110700-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 299

NWS STORM PREDICTION CENTER NORMAN OK

650 PM CDT SAT MAY 10 2008



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       ARKANSAS

       SOUTHERN MISSOURI

       NORTHWEST MISSISSIPPI



EFFECTIVE THIS SATURDAY NIGHT AND SUNDAY MORNING FROM 650 PM

UNTIL 200 AM CDT.



...THIS IS A PARTICULARLY DANGEROUS SITUATION...



DESTRUCTIVE TORNADOES...LARGE 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 160 STATUTE

MILES NORTH AND SOUTH OF A LINE FROM 15 MILES WEST SOUTHWEST OF

FAYETTEVILLE ARKANSAS TO 70 MILES SOUTHEAST OF BATESVILLE

ARKANSAS.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE

ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU9).



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...THIS TORNADO WATCH REPLACES TORNADO

WATCH NUMBER 296. WATCH NUMBER 296 WILL NOT BE IN EFFECT AFTER

650 PM CDT. CONTINUE...WW 293...WW 294...WW 295...WW 297...WW

298...



DISCUSSION...OUTBREAK OF SEVERE THUNDERSTORMS INCLUDING TORNADOES

SHOULD CONTINUE SPREADING ESEWD ACROSS WW OVERNIGHT AHEAD OF

UNSEASONABLY STRONG UPPER SYSTEM AND ASSOCIATED MID/UPPER LEVEL JET.

 AIR MASS IS MODERATE TO STRONGLY UNSTABLE ALONG AND SOUTH OF A WARM

FRONT EXTENDING FROM SWRN MO INTO CENTRAL AR/NRN MS EARLY THIS

EVENING WHICH WILL SUSTAIN INTENSE SUPERCELLS.  IN ADDITION...LOW

LEVEL SHEAR REMAINS VERY STRONG AND WILL SUPPORT POTENTIAL FOR

SIGNIFICANT TORNADOES WITHIN THE WATCH AREA THROUGH LATE TONIGHT.



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 27035.





...EVANS

