

843 

WWUS20 KWNS 091846

SEL3

SPC WW 091846

ARZ000-KSZ000-MOZ000-OKZ000-100200-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 123

NWS STORM PREDICTION CENTER NORMAN OK

145 PM CDT THU APR 9 2009



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       PARTS OF WESTERN ARKANSAS

       PARTS OF SOUTHEAST KANSAS

       PARTS OF SOUTHWEST MISSOURI

       MUCH OF EASTERN OKLAHOMA



EFFECTIVE THIS THURSDAY AFTERNOON AND EVENING FROM 145 PM UNTIL

900 PM CDT.



TORNADOES...HAIL TO 3.5 INCHES IN DIAMETER...THUNDERSTORM WIND

GUSTS TO 80 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE

AREAS.



THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 85 STATUTE

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

CHANUTE KANSAS TO 45 MILES WEST SOUTHWEST OF DE QUEEN ARKANSAS.

FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH

OUTLINE UPDATE (WOUS64 KWNS WOU3).



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.



DISCUSSION...POTENT TROUGH AND STRONG SURFACE LOW MOVING EWD ACROSS

OK AND N/S DRY LINE IN ADVANCE JUST E OF I35 CORRIDOR.  AIRMASS IN

ADVANCE OF DRY LINE RAPIDLY DESTABILIZING AND WITH STRONG SHEAR

PROFILES AND LARGE ASCENT WITH TROUGH...SEVERE THUNDERSTORMS WILL

RAPIDLY DEVELOP NEXT SEVERAL HOURS ERN OK.  IN ADDITION TO VERY

LARGE HAIL...TORNADOES POSSIBLY STRONG WILL BE POSSIBLE WITH ANY

SUPERCELL THAT DEVELOPS.



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

SURFACE AND ALOFT TO 3.5 INCHES. EXTREME TURBULENCE AND SURFACE

WIND GUSTS TO 70 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO

500. MEAN STORM MOTION VECTOR 24040.





...HALES

