FLUS43 KLOT 202142
HWOLOT
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
442 PM CDT SAT JUN 20 2015
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-
442 PM CDT SAT JUN 20 2015
THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTH CENTRAL ILLINOIS...
NORTHEAST ILLINOIS AND NORTHWEST INDIANA.
.DAY ONE...TONIGHT.
WEATHER HAZARDS EXPECTED:
SCATTERED THUNDERSTORMS...SOME OF WHICH MAY PRODUCE:
TORRENTIAL RAINFALL.
FREQUENT CLOUD TO GROUND LIGHTNING.
WIND GUSTS OVER 60 MPH.
QUARTER SIZED HAIL.
AREAS AFFECTED AND TIMING:
SHOWERS AND THUNDERSTORMS ARE LIKELY OVER NORTH CENTRAL ILLINOIS
LATE THIS AFTERNOON...AND THEN LIKELY ACROSS THE ENTIRE OUTLOOK
AREA FROM EARLY TO MID EVENING. THE HIGHEST THREAT FOR STRONG TO
SEVERE STORMS AND THUNDERSTORMS PRODUCING FREQUENT CLOUD TO
GROUND LIGHTNING WILL PASS WEST OF A BYRON TO OTTAWA TO PAXTON
LINE.
DISCUSSION:
A COLD FRONT WILL SINK SOUTHEAST THROUGH THE REGION THIS
EVENING...WITH AN AREA OF THUNDERSTORMS FORMING AHEAD OF THE
FRONT. A MOIST AIRMASS WILL ALSO BE IN PLACE SO TORRENTIAL
DOWNPOURS ARE LIKELY WITH WELL ORGANIZED THUNDERSTORMS. GIVEN
THE RECENT HEAVY RAINFALL...FLASH FLOODING IS POSSIBLE ALONG
WITH RISES ON LOCAL RIVERS AND STREAMS. THE MAIN SEVERE WEATHER
THREATS WILL BE LARGE HAIL AND ISOLATED DAMAGING WIND GUSTS.
MODERATE TO MAJOR FLOODING CONTINUES ON PORTIONS OF THE KANKAKEE
AND IROQUOIS RIVERS IN NORTHWEST INDIANA...AND MODERATE FLOODING
CONTINUES ON THE ILLINOIS RIVER NEAR LA SALLE.
.DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY.
THERE ARE PERIODIC THUNDERSTORM CHANCES ACROSS THE ENTIRE OUTLOOK
AREA SUNDAY THROUGH FRIDAY. SOME OF THE STORMS ON MONDAY COULD BE
STRONG TO SEVERE AND PRODUCE HEAVY RAINFALL.
PORTIONS OF THE ILLINOIS...IROQUOIS AND KANKAKEE RIVERS WILL
REMAIN IN FLOOD.
.SPOTTER INFORMATION STATEMENT...
SPOTTERS MAY BE NEEDED IN PORTIONS OF THE OUTLOOK AREA THIS
EVENING.
&&
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