[LeArc] Weather Watch : 3@ 7/7/2003 7:40:17 PM

[learc@mailman.qth.net]

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


WWUS20 KWNS 080039
SEL3  
SPC WW 080040
ILZ000-INZ000-LMZ000-080400-

URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 673 
NWS STORM PREDICTION CENTER NORMAN OK 
740 PM CDT MON JUL 7 2003

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

       NORTHERN ILLINOIS
       NORTHWEST INDIANA
       LAKE MICHIGAN

EFFECTIVE THIS MONDAY EVENING FROM 740 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 55 STATUTE MILES
NORTH AND SOUTH OF A LINE FROM 75 MILES WEST SOUTHWEST OF ROCKFORD
ILLINOIS TO 50 MILES SOUTHEAST OF MEIGS FIELD 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 668...WW 669...WW 670...WW
671...WW 672...


DISCUSSION...THUNDERSTORMS/POSSIBLE SUPERCELLS EXPECTED TO
MOVE/DEVELOP EWD ALONG STALLED CONFLUENCE ZONE OVER NRN IL.  AREA
RAOB AND VWP DATA SUGGEST THREAT FOR LARGE HAIL AND POSSIBLY SMALL
SCALE BOWING SEGMENTS WITH DAMAGING WIND BEFORE ACTIVITY TRANSITIONS
INTO AN MCS WITH HEAVY RAIN.

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 29025.


...CORFIDI

;423,0902 420,0865 403,0865 405,0902; 

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