[LeArc] Weather Watch : 0@ 4/19/02 5:20:42 PM

[learc@mailman.qth.net]

The following weather message is provided by McDonough County E.S.D.A.


WWUS20 KWNS 192220
SEL0  
SPC WW 192212
ILZ000-MOZ000-200300-

URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 130
STORM PREDICTION CENTER NORMAN OK
512 PM CDT FRI APR 19 2002

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

CENTRAL AND WEST CENTRAL ILLINOIS                           
EAST CENTRAL MISSOURI                           

EFFECTIVE THIS FRIDAY AFTERNOON AND EVENING FROM 530 PM UNTIL 1000
PM 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 55 MILES WEST OF SAINT LOUIS
MISSOURI TO 30 MILES SOUTHEAST OF DECATUR ILLINOIS.

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... CONTINUE...WW 126...WW 127...WW 128...WW
129...

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 24030.

DISCUSSION...THUNDERSTORMS NW OF STL AREA WILL INCREASE IN
COVERAGE/INTENSITY THE NEXT 1-2 HOURS AS AN OUTFLOW BOUNDARY MOVES
NWD AND MERGES WITH A SURFACE FRONT.  THE OUTFLOW AIR MASS IS
MODIFYING AND SHOULD BE SUFFICIENTLY UNSTABLE TO SUPPORT A SEVERE
STORM THREAT FOR THE NEXT FEW HOURS AFTER THE BOUNDARY MERGER. 
LARGE HAIL AND DAMAGING WINDS WILL BE THE MAIN THREATS.

...THOMPSON

;393,0912 402,0882 383,0882 375,0912;