

376 

WWUS20 KWNS 311902

SEL0

SPC WW 311902

ARZ000-ILZ000-KYZ000-MOZ000-TNZ000-010300-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 600

NWS STORM PREDICTION CENTER NORMAN OK

155 PM CDT FRI AUG 31 2012



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       NORTHEAST ARKANSAS

       SOUTHWEST ILLINOIS

       FAR WESTERN KENTUCKY

       SOUTHEAST AND EAST CENTRAL MISSOURI

       FAR NORTHWEST TENNESSEE



EFFECTIVE THIS FRIDAY AFTERNOON AND EVENING FROM 155 PM UNTIL

1000 PM CDT.



TORNADOES...HAIL TO 0.5 INCH IN DIAMETER...THUNDERSTORM WIND

GUSTS TO 70 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE

AREAS.



THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 60 STATUTE

MILES EAST AND WEST OF A LINE FROM 35 MILES NORTH NORTHWEST OF

ALTON ILLINOIS TO 40 MILES EAST SOUTHEAST 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.



DISCUSSION...TSTMS EXPECTED TO FORM LATER THIS AFTN IN RESPONSE TO

SFC HEATING ALONG CONFLUENCE BANDS IN ERN QUADRANT OF REMNANT

CIRCULATION OF ISAAC. AREA VWP DATA SHOW SUFFICIENT LOW LVL SHEAR

FOR LOW-LVL MESOS/POSSIBLE TORNADOES GIVEN RICH LOW-LVL MOISTURE/LOW

LCLS. WHILE LOW LVL SHEAR IN WW REGION IS SOMEWHAT WEAKER RELATIVE

TO YESTERDAY IN THE LWR MS VLY...LOW LVL LAPSE RATES ARE SOMEWHAT

STEEPER AND MAY YIELD A SIMILAR SVR THREAT.



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

SURFACE AND ALOFT TO 0.5 INCH. EXTREME TURBULENCE AND SURFACE

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

500. MEAN STORM MOTION VECTOR 19035.





...CORFIDI

