[LeArc] Weather Watch : 7@ 4/20/2003 1:47:41 AM

[learc@mailman.qth.net]

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


WWUS20 KWNS 200647
SEL7  
SPC WW 200650
ILZ000-MOZ000-201200-

URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 137
STORM PREDICTION CENTER NORMAN OK
150 AM CDT SUN APR 20 2003

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

   EXTREME SOUTHWEST ILLINOIS                           
   SOUTHEAST MISSOURI                           

EFFECTIVE THIS SUNDAY MORNING FROM 150 AM UNTIL 700 AM CDT.

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

THE SEVERE THUNDERSTORM WATCH AREA IS ALONG AND 55 STATUTE MILES
EAST AND WEST OF A LINE FROM 25 MILES SOUTH SOUTHWEST OF POPLAR
BLUFF MISSOURI TO 90 MILES NORTH NORTHWEST OF CAPE GIRARDEAU
MISSOURI.

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 136...

DISCUSSION...SMALL LINES/BOW ECHOES AND POSSIBLY A FEW SUPERCELLS
CAN BE EXPECTED ACROSS WW OVER THE NEXT FEW HOURS.  NARROW AXIS OF
MODERATE INSTABILITY APPEARS TO BE DEVELOPING INTO SERN MO WHERE
SBCAPES NEAR 1000 J/KG CAN BE EXPECTED.  GIVEN THE STRONG LOW AND
MID LEVEL SHEAR...ISOLATED WIND DAMAGE WILL BE PRIMARY SEVERE
THREAT.


AVIATION...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 400.  MEAN STORM MOTION
VECTOR 23040.


...EVANS

;382,0891 362,0893 362,0913 382,0911;

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