[LeArc] Weather Watch : 7@ 5/1/02 6:41:01 PM

[learc@mailman.qth.net]

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


WWUS20 KWNS 012341
SEL7  
SPC WW 012336
ILZ000-MOZ000-020400-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 197
STORM PREDICTION CENTER NORMAN OK
636 PM CDT WED MAY 1 2002

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

   WEST CENTRAL ILLINOIS                           
   SOUTH CENTRAL AND EAST CENTRAL MISSOURI                        
  

EFFECTIVE THIS WEDNESDAY AFTERNOON AND EVENING FROM 700 PM UNTIL
1100 PM CDT.

TORNADOES...HAIL TO 3 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS
TO 80 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.

THE TORNADO WATCH AREA IS ALONG AND 55 STATUTE MILES EAST AND WEST
OF A LINE FROM 35 MILES WEST SOUTHWEST OF WEST PLAINS MISSOURI TO
25 MILES EAST NORTHEAST OF ALTON 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 196...

DISCUSSION...THUNDERSTORMS HAVE BEGUN RAPIDLY DEVELOPING NEAR
SGF...WHILE TCU EXTENDS NORTHWARD ALONG FRONT INTO EAST CENTRAL MO. 
AIRMASS IN THIS REGION IS EXTREMELY UNSTABLE WITH SBCAPE VALUES
OVER 3000 J/KG.  VERY STRONG DEEP LAYER VERTICAL SHEAR AND 20-30
KNOT 1KM SHEAR VALUES INDICATE THAT SUPERCELLS ARE LIKELY WITH THE
THREAT OF VERY LARGE HAIL AND TORNADOES.

AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 3 INCHES.  EXTREME TURBULENCE AND SURFACE WIND
GUSTS TO 70 KNOTS.  A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500. 
MEAN STORM MOTION VECTOR 27045.

...HART

;363,0932 390,0903 390,0883 363,0912;

WWWW