[LeArc] Weather Watch : 9@ 7/5/2003 5:58:02 PM

[learc@mailman.qth.net]

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


WWUS20 KWNS 052257
SEL9  
SPC WW 052255
IAZ000-ILZ000-MOZ000-060500-

URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 649 
NWS STORM PREDICTION CENTER NORMAN OK 
555 PM CDT SAT JUL 5 2003

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

       SOUTHERN IOWA
       CENTRAL ILLINOIS
       NORTHERN MISSOURI

EFFECTIVE THIS SATURDAY AFTERNOON FROM 555 PM UNTIL MIDNIGHT CDT.

HAIL TO 3 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 70 STATUTE MILES
NORTH AND SOUTH OF A LINE FROM 80 MILES WEST NORTHWEST OF LAMONI
IOWA TO 35 MILES EAST OF CHAMPAIGN 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 644...WW 645...WW 646...WW
647...WW 648...WW 650...


DISCUSSION...THUNDERSTORMS/SUPERCELLS EXPECTED TO DEVELOP ALONG
STALLED FRONT/OUTFLOW BOUNDARY FROM SW IA ESE INTO E CNTRL IL. 
DEGREE OF INSTABILITY...COLD POOL POTENTIAL... AND INCREASING NWLY
MID LEVEL FLOW BEHIND ERN NEB SHORTWAVE TROUGH ALL SUGGEST
POSSIBILITY FOR SEWD-MOVING BOWING SEGMENTS WITH HIGH WIND/HAIL.

AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT
TO 3 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60
KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 600. MEAN STORM
MOTION VECTOR 29030.


...CORFIDI

;420,0952 410,0873 390,0873 400,0952; 

WWWW