

000 

WWUS20 KWNS 132209

SEL2

SPC WW 132209

ARZ000-KSZ000-MOZ000-OKZ000-140400-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 312

NWS STORM PREDICTION CENTER NORMAN OK

510 PM CDT TUE MAY 13 2008



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       FAR NORTHWEST ARKANSAS

       SOUTHEAST KANSAS

       SOUTHWEST MISSOURI

       NORTHEAST OKLAHOMA



EFFECTIVE THIS TUESDAY AFTERNOON AND EVENING FROM 510 PM UNTIL

1100 PM CDT.



TORNADOES...HAIL TO 2.5 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 65 STATUTE

MILES EAST AND WEST OF A LINE FROM 20 MILES EAST SOUTHEAST OF

TULSA OKLAHOMA TO 95 MILES NORTHEAST OF CHANUTE KANSAS.  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.



OTHER WATCH INFORMATION...CONTINUE...WW 311...



DISCUSSION...THUNDERSTORM ARE EXPECTED TO INTENSIFY ALONG SURFACE

COLD FRONT OVER NERN OK/SERN KS IN THE NEXT HOUR OR SO AND MOVE EWD

INTO NWRN AR/SWRN MO THRU THE EVENING.  AIR MASS IS MODERATELY

UNSTABLE WITH SUFFICIENT DEEP LAYER SHEAR FOR SUPERCELLS...PRODUCING

LARGE HAIL AND ISOLATED DAMAGING WINDS.  LOW LEVEL SHEAR WILL ALSO

SUFFICE FOR ISOLATED TORNADO THREAT.



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

SURFACE AND ALOFT TO 2.5 INCHES. EXTREME TURBULENCE AND SURFACE

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

450. MEAN STORM MOTION VECTOR 25030.





...EVANS

