[LeArc] Weather Watch : 8@ 7/6/2003 6:01:59 PM

[learc@mailman.qth.net]

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


WWUS20 KWNS 062300
SEL8  
SPC WW 062300
ILZ000-INZ000-LMZ000-070400-

URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 658 
NWS STORM PREDICTION CENTER NORMAN OK 
600 PM CDT SUN JUL 6 2003

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

       NORTHEAST ILLINOIS
       NORTHWEST INDIANA
       LAKE MICHIGAN

EFFECTIVE THIS SUNDAY EVENING FROM 600 PM UNTIL 1100 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 35 MILES NORTHWEST OF MARSEILLES
ILLINOIS TO 45 MILES NORTH OF LAFAYETTE INDIANA.

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...THIS SEVERE THUNDERSTORM WATCH REPLACES
TORNADO WATCH NUMBER 653. WATCH NUMBER 653 WILL NOT BE IN EFFECT
AFTER 600 PM CDT. CONTINUE...WW 656...WW 657...


DISCUSSION...THUNDERSTORMS/POSSIBLE SUPERCELLS EXPECTED TO PERSIST
IN LOW LEVEL WARM ADVECTION ENVIRONMENT IN WAKE OF PASSING LK MI
MCV.  DEGREE OF INSTABILITY...STRENGTH OF INFLOW AND EXISTING
OUTFLOW BOUNDARIES SUGGEST POTENTIAL FOR LARGE HAIL/LOCALLY DAMAGING
WIND AND PERHAPS A BRIEF TORNADO THROUGH LATER THIS EVENING.

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 550. MEAN STORM
MOTION VECTOR 28025.


...CORFIDI

;423,0890 415,0865 401,0865 405,0890; 

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