FLUS43 KLOT 171709
HWOLOT
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
1209 PM CDT FRI JUL 17 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-
1209 PM CDT FRI JUL 17 2015
THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTH CENTRAL ILLINOIS...
NORTHEAST ILLINOIS AND NORTHWEST INDIANA.
.DAY ONE...THIS AFTERNOON AND TONIGHT.
WEATHER HAZARDS EXPECTED:
ISOLATED THUNDERSTORMS...SOME OF WHICH MAY PRODUCE:
WIND GUSTS IN EXCESS OF 60 MPH.
OCCASIONAL CLOUD TO GROUND LIGHTNING.
BRIEF HEAVY DOWNPOURS AND LOCALIZED FLOODING.
AREAS AFFECTED AND TIMING:
ISOLATED THUNDERSTORMS ARE POSSIBLE THIS AFTERNOON AND EARLY
THIS EVENING...WITH THE GREATEST CHANCE SOUTH OF INTERSTATE 80.
DISCUSSION:
HOT AND HUMID CONDITIONS WILL ALLOW THE ATMOSPHERE TO GROW
QUITE UNSTABLE THIS AFTERNOON. WHILE THERE ARE NO FRONTS IN THE
AREA...THE INSTABILITY COULD BE GREAT ENOUGH TO ALLOW A COUPLE
OF THUNDERSTORMS TO DEVELOP THIS AFTERNOON AND EARLY THIS
EVENING...ESPECIALLY SOUTH OF INTERSTATE 80. ANY STORMS THAT DO
DEVELOP COULD PRODUCE BRIEF GUSTY WINDS AND TORRENTIAL
RAINFALL.
IN ADDITION...HEAT INDICES OF 100 TO 106 DEGREES ARE EXPECTED THIS
AFTERNOON.
PORTIONS OF THE ILLINOIS...IROQUOIS...AND KANKAKEE RIVERS REMAIN
IN FLOOD.
.DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY.
HIGH TEMPERATURES SATURDAY WILL CLIMB INTO THE 90S...COMBINED
WITH HIGH HUMIDITY WILL LIKELY RESULT IN PEAK HEAT INDEX VALUES OF
105 TO 110 DEGREES SATURDAY AFTERNOON.
THERE WILL BE A CHANCE OF THUNDERSTORMS MAINLY SATURDAY NIGHT AND
SUNDAY. SOME OF THESE STORMS COULD BE SEVERE WITH DAMAGING WINDS
AND LARGE HAIL...AS WELL AS TORRENTIAL RAINFALL THAT COULD LEAD
TO FLOODING. THERE IS A SLIGHT CHANCE OF THUNDERSTORMS AGAIN
TUESDAY AND A GREATER CHANCE ON THURSDAY.
ILLINOIS...IROQUOIS...AND KANKAKEE RIVERS WILL REMAIN
IN FLOOD.
.SPOTTER INFORMATION STATEMENT...
SPOTTER ACTIVATION WILL NOT BE NECESSARY THROUGH TONIGHT.
&&
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