FLUS43 KLOT 202131
HWOLOT
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
431 PM CDT WED AUG 20 2014
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-
431 PM CDT WED AUG 20 2014 /531 PM EDT WED AUG 20 2014/
THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTH CENTRAL ILLINOIS...
NORTHEAST ILLINOIS AND NORTHWEST INDIANA.
.DAY ONE...TONIGHT.
WEATHER HAZARDS EXPECTED:
SCATTERED THUNDERSTORMS...SOME COULD PRODUCE:
WIND GUSTS TO 50 MPH.
PEA TO NICKEL SIZE HAIL.
HEAVY RAINFALL LEADING TO LOCALIZED FLOODING.
FREQUENT CLOUD TO GROUND LIGHTNING.
AREAS AFFECTED AND TIMING:
ISOLATED STORMS ARE POSSIBLE SOUTHWEST OF A LINE FROM OREGON TO
WATSEKA THROUGH EARLY EVENING...THEN EXPANDING NORTH AND
NORTHEAST WITH THUNDERSTORMS LIKELY ACROSS THE ENTIRE OUTLOOK
AREA OVERNIGHT.
DISCUSSION:
A STATIONARY FRONTAL BOUNDARY SITUATED ACROSS THE REGION WILL
LIFT NORTH AS A WARM FRONT THIS EVENING WHILE MOISTURE AND
INSTABILITY CONTINUE TO INCREASE OVERNIGHT. ISOLATED THUNDERSTORMS
ARE POSSIBLE THROUGH EARLY EVENING BUT WILL LIKELY REMAIN WEAK.
THUNDERSTORMS ARE THEN EXPECTED TO STEADILY BUILD IN COVERAGE AND
INTENSITY LATE THIS EVENING INTO EARLY THURSDAY MORNING. WITH THE
MOISTURE RICH AIR IN PLACE...HEAVY RAINFALL LEADING TO LOCALIZED
FLOODING WILL BE THE MAIN THE HAZARD. IN ADDITION A FEW OF THE
STRONGEST THUNDERSTORMS MAY BE CAPABLE OF PRODUCING WIND GUSTS UP
TO 50 MPH AND SMALL HAIL.
.DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY.
THUNDERSTORMS...SOME OF WHICH COULD BE STRONG TO SEVERE...ARE
LIKELY THURSDAY AND THURSDAY NIGHT WITH HEAVY RAINFALL LIKELY
OCCURRING WITH ANY STRONGER STORMS.
THERE WILL CONTINUE TO BE PERIODIC CHANCES FOR THUNDERSTORMS
FRIDAY THROUGH TUESDAY.
HEAT INDICES COULD EXCEED 100 DEGREES ON FRIDAY...PRIMARILY FOR
AREAS SOUTH OF INTERSTATE 80.
.SPOTTER INFORMATION STATEMENT...
SPOTTER ACTIVATION WILL NOT BE NECESSARY THROUGH TONIGHT...THOUGH
RAINFALL REPORTS WOULD BE APPRECIATED.
&&
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