

205 

WWUS20 KWNS 240118

SEL0

SPC WW 240118

ARZ000-MOZ000-240500-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 190

NWS STORM PREDICTION CENTER NORMAN OK

820 PM CDT SAT APR 23 2011



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       PARTS OF NORTHERN ARKANSAS

       MISSOURI BOOTHEEL



EFFECTIVE THIS SATURDAY NIGHT FROM 820 PM UNTIL MIDNIGHT 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 30 STATUTE

MILES NORTH AND SOUTH OF A LINE FROM 15 MILES SOUTH OF HARRISON

ARKANSAS TO 55 MILES EAST NORTHEAST OF JONESBORO ARKANSAS.  FOR A

COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE

UPDATE (WOUS64 KWNS WOU0).



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 187...WW 189...



DISCUSSION...SUPERCELL HAS DEVELOPED ALONG E/W BOUNDARY ACROSS NRN

AR.  WITH FAVORABLE SHEAR AND INSTABILITY...CONDITIONS WILL BE

FAVORABLE FOR TORNADOS AS THE STORM CONTINUES EWD ACROSS THE WATCH.



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

500. MEAN STORM MOTION VECTOR 27030.





...HALES

