

000 

WWUS20 KWNS 312045

SEL9

SPC WW 312045

ARZ000-MOZ000-OKZ000-010400-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 149

NWS STORM PREDICTION CENTER NORMAN OK

345 PM CDT MON MAR 31 2008



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       NORTHERN AND WESTERN ARKANSAS

       SOUTHERN MISSOURI

       EASTERN OKLAHOMA



EFFECTIVE THIS MONDAY AFTERNOON AND EVENING FROM 345 PM UNTIL

1100 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 50 STATUTE

MILES EITHER SIDE OF A LINE FROM 30 MILES SOUTH SOUTHWEST OF

MCALESTER OKLAHOMA TO 60 MILES NORTHEAST OF WEST PLAINS MISSOURI.

 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...CONTINUE...WW 146...WW 147...WW 148...



DISCUSSION...LINE OF INTENSE THUNDERSTORMS...INCLUDING EMBEDDED

SUPERCELLS AND BOW ECHOES...IS DEVELOPING SOUTHEASTWARD INTO

SOUTHERN MO/NORTHWEST AR/EASTERN OK.  MODERATE INSTABILITY AND VERY

STRONG VERTICAL SHEAR PROFILES WILL MAINTAIN A RISK OF LARGE

HAIL...DAMAGING WINDS...AND A FEW TORNADOES THROUGH THE EVENING

HOURS.  PARAMETERS APPEAR FAVORABLE FOR A RISK OF ISOLATED STRONG

TORNADOES OVER WESTERN AR AND EASTERN OK.



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 24030.





...HART

