566
WWUS9 KMKC 182337
SEL1
MKC WW 182329
ILZ000-MOZ000-190400-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 591
STORM PREDICTION CENTER NORMAN OK
629 PM CDT TUE JUL 18 2000

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

CENTRAL AND SOUTHERN ILLINOIS
EAST CENTRAL MISSOURI

EFFECTIVE THIS TUESDAY AFTERNOON AND EVENING FROM 645 PM UNTIL 1100
PM CDT.

TORNADOES...HAIL TO 1 INCH IN DIAMETER...THUNDERSTORM WIND GUSTS TO
70 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.

THE TORNADO WATCH AREA IS ALONG AND 55 STATUTE MILES EITHER SIDE OF
A LINE FROM 60 MILES WEST OF SAINT LOUIS MISSOURI TO 15 MILES EAST
NORTHEAST OF SALEM 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... CONTINUE...WW 590...

DISCUSSION...STORMS IN E CENTRAL MO HAVE BEGUN ROTATING AND
PRESSURE FALL AND INCREASING SELY LOW LEVEL FLOW IN STL AREA
SUGGESTS TORNADO THREAT IS INCREASING ESEWD INTO STL AREA AND WRN
IL. THIS ACTIVITY IS ASSOCIATED WITH MVC MOVING INTO AREA.

AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 1 INCH...EXTREME TURBULENCE AND SURFACE WIND
GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 550.
MEAN STORM MOTION VECTOR 28020.

...JOHNS

;375,0884 375,0912 393,0912 393,0884;