[LeArc] Weather Watch : 1@ 7/20/2003 11:33:48 PM

[learc@mailman.qth.net]

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


WWUS20 KWNS 210430
SEL1  
SPC WW 210430
ILZ000-MOZ000-211000-

URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 781 
NWS STORM PREDICTION CENTER NORMAN OK 
1130 PM CDT SUN JUL 20 2003

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

       CENTRAL ILLINOIS
       NORTHEAST MISSOURI

EFFECTIVE THIS SUNDAY NIGHT AND MONDAY MORNING FROM 1130 PM UNTIL
500 AM CDT.

HAIL TO 2 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS TO 80
MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.

THE SEVERE THUNDERSTORM WATCH AREA IS ALONG AND 45 STATUTE MILES
NORTH AND SOUTH OF A LINE FROM 55 MILES WEST OF QUINCY ILLINOIS TO
20 MILES NORTH OF DANVILLE 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 776...WW 778...WW 779...WW
780...


DISCUSSION...STRONG/SEVERE THUNDERSTORMS ARE EXPECTED TO DEVELOP
ACROSS NORTHEAST MO AND CENTRAL IL DURING THE NEXT FEW HOURS.  VERY
UNSTABLE AIRMASS...COUPLED WITH STRONG DYNAMIC FORCING AND FAVORABLE
VERTICAL SHEAR PROFILES WILL SUPPORT THE THREAT OF DAMAGING WINDS
AND LARGE HAIL IN STRONGER CELLS.

AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT
TO 2 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 70
KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500. MEAN STORM
MOTION VECTOR 24035.


...HART

;403,0921 410,0873 395,0873 391,0921;