[LeArc] Weather Watch : 4@ 7/20/2003 4:39:49 PM

[learc@mailman.qth.net]

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


WWUS20 KWNS 202123
SEL4  
SPC WW 202125
ILZ000-INZ000-WIZ000-LMZ000-210200-

URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 774 
NWS STORM PREDICTION CENTER NORMAN OK 
425 PM CDT SUN JUL 20 2003

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

       NORTHEAST ILLINOIS
       NORTHWEST INDIANA
       EASTERN WISCONSIN
       LAKE MICHIGAN

EFFECTIVE THIS SUNDAY AFTERNOON AND EVENING FROM 425 PM UNTIL 900
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
EAST AND WEST OF A LINE FROM 40 MILES NORTHWEST OF GREEN BAY
WISCONSIN TO 55 MILES SOUTHEAST OF MARSEILLES 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 771...WW 772...WW 773...


DISCUSSION...SCATTERED THUNDERSTORMS ARE DEVELOPING OVER CENTRAL WI
AND NORTHERN IL...IN REGION OF VERY UNSTABLE AIRMASS AND MODERATE
VERTICAL SHEAR.  PRESENT INDICATIONS ARE THAT A FEW SUPERCELLS MAY
DEVELOP...CAPABLE OF LARGE HAIL AND DAMAGING WINDS.

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 500. MEAN STORM
MOTION VECTOR 24035.


...HART

;445,0873 404,0865 404,0885 445,0894;