HAZARDOUS WEATHER OUTLOOK FOR WINNEBAGO-BOONE-MCHENRY-LAKE ILLINOIS-OGLE-LEE-DE KALB-KANE- DUPAGE-COOK-LA SALLE-KENDALL-GRUNDY-WILL-KANKAKEE-LIVINGSTON- IROQUOIS-FORD-LAKE INDIANA-PORTER-NEWTON-JASPER-BENTON

HAZARDOUS WEATHER OUTLOOK 
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL 
440 PM CDT MON JUL 2 2012 

ILZ003>006-008-010>014-019>023-032-033-039-INZ001-002-010-011-019- 
032145- 
WINNEBAGO-BOONE-MCHENRY-LAKE ILLINOIS-OGLE-LEE-DE KALB-KANE- 
DUPAGE-COOK-LA SALLE-KENDALL-GRUNDY-WILL-KANKAKEE-LIVINGSTON- 
IROQUOIS-FORD-LAKE INDIANA-PORTER-NEWTON-JASPER-BENTON- 
440 PM CDT MON JUL 2 2012 /540 PM EDT MON JUL 2 2012/ 

THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTH CENTRAL ILLINOIS... 
NORTHEAST ILLINOIS AND NORTHWEST INDIANA. 

.DAY ONE...TONIGHT. 

WEATHER HAZARDS EXPECTED: 

ISOLATED THUNDERSTORMS...THE STRONGEST CAPABLE OF PRODUCING: 
HAIL TO THE SIZE OF QUARTERS. 
DAMAGING WINDS OVER 60 MPH. 
HEAVY RAIN. 
AND FREQUENT LIGHTNING. 

AREAS AFFECTED AND TIMING: 

ALL OF NORTHEAST ILLINOIS AND NORTHWEST INDIANA THROUGH EARLY 
THIS EVENING. 

DISCUSSION: 

AS SEVERAL WEAK MID LEVEL DISTURBANCES SHIFT ACROSS A MOIST AND 
VERY UNSTABLE ATMOSPHERE LATE THIS AFTERNOON INTO THE EARLY 
EVENING...ISOLATED DEVELOPMENT COULD STILL BE POSSIBLE. ALTHOUGH 
THE SEVERE THREAT IS NOT THE HIGHEST...THE STRONGEST STORMS 
COULD STILL PRODUCE HIGH WINDS AND LARGE HAIL BEFORE ALL CHANCES 
FOR THUNDERSTORMS DIMINISH LATER THIS EVENING. 

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY. 

THERE IS A SLIGHT CHANCE OF THUNDERSTORMS WEDNESDAY...AND PERIODIC 
CHANCES FRIDAY THROUGH SUNDAY. 

AN EXTENDED PERIOD OF HEAT AND HUMIDITY WILL CONTINUE THROUGH 
SATURDAY WITH DAYTIME HIGHS IN THE 90S WITH ONLY SOME OCCASIONAL 
COOLING NEAR THE LAKE. PEAK AFTERNOON HEAT INDICES ARE EXPECTED TO 
RANGE BETWEEN 100 AND 105 DEGREES EACH DAY. 

.SPOTTER INFORMATION STATEMENT... 


SPOTTERS MAY BE NEEDED THROUGH EARLY THIS EVENING. 

&& 

COMPLETE FORECAST INFORMATION IS AVAILABLE ON THE NWS CHICAGO 
WEBPAGE: WEATHER.GOV/CHICAGO