000 
WWUS20 KWNS 090500
SEL5  
SPC WW 090505
ILZ000-INZ000-MOZ000-091100-

URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 315 
NWS STORM PREDICTION CENTER NORMAN OK 
1205 AM CDT FRI MAY 9 2003

THE NWS STORM PREDICTION CENTER HAS ISSUED A
SEVERE THUNDERSTORM WATCH FOR PORTIONS OF 

       CENTRAL AND  NORTHERN ILLINOIS
       NORTHWESTERN INDIANA
       EAST CENTRAL MISSOURI

EFFECTIVE THIS FRIDAY MORNING FROM 1205 AM UNTIL 600 AM CDT.

HAIL TO 2 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS TO 70
MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.

THE SEVERE THUNDERSTORM WATCH AREA IS ALONG AND 60 STATUTE MILES
NORTH AND SOUTH OF A LINE FROM 40 MILES WEST NORTHWEST OF SAINT
LOUIS MISSOURI TO 25 MILES NORTH OF LAFAYETTE INDIANA.

REMEMBER...A SEVERE THUNDERSTORM WATCH MEANS CONDITIONS ARE
FAVORABLE FOR 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. SEVERE THUNDERSTORMS CAN AND OCCASIONALLY DO PRODUCE
TORNADOES.

OTHER WATCH INFORMATION...THIS SEVERE THUNDERSTORM WATCH REPLACES
SEVERE THUNDERSTORM WATCH NUMBER 314. WATCH NUMBER 314 WILL NOT BE
IN EFFECT AFTER 1205 AM CDT. CONTINUE...WW 312...WW 313...


DISCUSSION...STRONG ELEVATED SUPERCELLS MOVING EWD ACROSS CENTRAL IL
WITH  LARGE HAIL THREAT CONTINUING. ADDITIONALLY SEVERE STORMS FROM
CENTRAL MO WILL MAINTAIN SEVERE THREAT AS THEY MOVE EWD INTO
PROXIMITY OF WARM FRONT MOVING NWD THRU STL AREA.

AVIATION...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 24040.


...HALES

395,0910 413,0865 395,0865 380,0910