661 
WWUS20 KWNS 211913
SEL9  
SPC WW 211908
ILZ000-MOZ000-212300-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 139
STORM PREDICTION CENTER NORMAN OK
208 PM CDT SUN APR 21 2002

THE STORM PREDICTION CENTER HAS ISSUED A
TORNADO WATCH FOR PORTIONS OF

   SOUTHERN ILLINOIS                           
   SOUTHEASTERN MISSOURI                           

EFFECTIVE THIS SUNDAY AFTERNOON AND EVENING FROM 215 PM UNTIL 600
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 ALONG AND 70 STATUTE MILES EAST AND WEST
OF A LINE FROM 30 MILES SOUTHEAST OF POPLAR BLUFF MISSOURI TO 15
MILES WEST NORTHWEST OF MATTOON ILLINOIS.

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...THIS TORNADO WATCH REPLACES SEVERE
THUNDERSTORM WATCH NUMBER 136.  WATCH NUMBER 136 WILL NOT BE IN
EFFECT AFTER 215 PM CDT.  CONTINUE...WW 137...WW 138...

DISCUSSION...INCREASING TORNADO THREAT DEVELOPING NEAR AND NORTH OF
OUTFLOW BOUNDARY ACROSS CENTRAL IL...WHERE SURFACE LOW WILL LIKELY
TRACK.  SUPERCELLS WILL ALSO LIKELY DEVELOP SWD ALONG APPROACHING
COLD FRONT INTO SRN IL.

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 26040.

...EVANS

;362,0912 393,0895 393,0871 362,0884;

489 
WWUS20 KWNS 211913
SEL9  
SPC WW 211908
ILZ000-MOZ000-212300-