FLUS43 KLOT 182048
HWOLOT
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
348 PM CDT FRI SEP 18 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-
348 PM CDT FRI SEP 18 2015
THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTH CENTRAL ILLINOIS...
NORTHEAST ILLINOIS AND NORTHWEST INDIANA.
.DAY ONE...TONIGHT.
WEATHER HAZARDS EXPECTED:
THUNDERSTORMS...SOME MAY PRODUCE:
HAIL TO THE SIZE OF QUARTERS.
WINDS GUSTING TO 60 MPH.
BRIEF DOWNPOURS...LEADING TO FLASH FLOODING.
FREQUENT CLOUD TO GROUND LIGHTNING.
AREAS AFFECTED AND TIMING:
SCATTERED THUNDERSTORMS WERE MOVING INTO PORTION OF NORTHERN
ILLINOIS THIS AFTERNOON...AND WILL CONTINUE TO OVERSPREAD MUCH
OF THE OUTLOOK AREA INTO THIS EVENING. THERE COULD BE A BREAK
DURING THE MID TO LATE EVENING HOURS...BEFORE ANOTHER MORE
ORGANIZED AREA OF THUNDERSTORMS MOVE IN OVERNIGHT. RAIN AND
THUNDERSTORMS WILL THEN END FROM NORTHWEST TO SOUTHEAST AROUND
SUNRISE SATURDAY MORNING.
DISCUSSION:
A NEARLY STATIONARY COLD FRONTAL BOUNDARY STRETCHED ACROSS
NORTHERN ILLINOIS THIS AFTERNOON...WITH A SURFACE LOW PRESSURE
WAVE ALONG THE FRONT OVER NORTHWEST MISSOURI. THIS LOW WILL
LIFT NORTHEAST ALONG THE FRONT THIS EVENING AND TONIGHT...AND
WILL RESULT IN INCREASING RAIN AND THUNDERSTORMS ACROSS THE
OUTLOOK AREA FROM LATE THIS AFTERNOON THROUGH TONIGHT. PORTIONS
OF FAR NORTHERN ILLINOIS RECEIVED HEAVY RAINFALL OF 1 TO 3
INCHES FROM STORMS ON THURSDAY NIGHT...AND HEAVY
RAINFALL IS LIKELY TONIGHT WHICH COULD PRODUCE LOCALIZED
FLOODING. SOME STORMS COULD PRODUCE SEVERE WEATHER...IN THE
FORM OF GUSTY WINDS AND LARGE HAIL...ESPECIALLY THROUGH THIS
EVENING.
.DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY.
HIGH WAVES WILL CREATE HAZARDOUS SWIMMING CONDITIONS FOR ILLINOIS
AND INDIANA BEACHES SATURDAY AND SATURDAY EVENING.
.SPOTTER INFORMATION STATEMENT...
SPOTTER ACTIVATION MAY BE NECESSARY LATE THIS AFTERNOON INTO
TONIGHT...MAINLY ACROSS AREAS SOUTH OF INTERSTATE 80 AND WEST OF
INTERSTATE 39 IN NORTHERN ILLINOIS.
&&
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