NORTHEAST ILLINOIS AND NORTHWEST INDIANA.
.DAY ONE...TODAY AND TONIGHT.
WEATHER HAZARDS EXPECTED:
HEAT INDICES OVER 100 DEGREES.
AND THUNDERSTORMS...SOME MAY PRODUCE:
DAMAGING WINDS IN EXCESS OF 60 MPH.
AND VERY HEAVY RAINFALL LEADING TO LOCALIZED FLASH FLOODING.
AREAS AFFECTED AND TIMING:
HEAT INDICES OVER 100 DEGREES ARE LIKELY THIS
AFTERNOON...ESPECIALLY SOUTH OF INTERSTATES 88 AND 290.
SCATTERED THUNDERSTORMS ARE LIKELY THIS MORNING WITH ADDITIONAL
THUNDERSTORMS EXPECTED LATE THIS AFTERNOON INTO TONIGHT.
DISCUSSION:
SCATTERED THUNDERSTORMS ARE LIKELY THIS MORNING...WITH MORE
INTENSE STORMS POSSIBLY PRODUCING LOCALLY HEAVY RAINFALL.
THUNDERSTORMS SHOULD DIMINISH BY LATE MORNING WITH PARTIAL
CLEARING EXPECTED MIDDAY. THIS SUNSHINE SHOULD ALLOW
TEMPERATURES TO SOAR INTO THE LOWER 90S WITH VERY HIGH HUMIDITY
LEADING TO HEAT INDICES OVER 100 DEGREES IN MANY AREAS. HEAT
INDICES WILL LIKELY EXCEED 105 DEGREES SOUTH OF INTERSTATE 88.
ADDITIONAL STRONG TO SEVERE THUNDERSTORMS ARE LIKELY TO DEVELOP
LATE THIS AFTERNOON INTO TONIGHT ALONG AN ADVANCING COLD FRONT.
WHILE THERE IS A THREAT THAT SOME OF THE STORMS COULD PRODUCE
DAMAGING WINDS...THE PRIMARY THREAT LOOKS TO BE LOCALLY HEAVY
RAINFALL WHICH COULD RESULT IN FLASH FLOODING.
.DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY.
THUNDERSTORMS ARE POSSIBLE FRIDAY INTO FRIDAY EVENING...MAINLY
SOUTH OF INTERSTATE 80.
THUNDERSTORMS ARE POSSIBLE AGAIN TUESDAY INTO WEDNESDAY OF NEXT
WEEK.
.SPOTTER INFORMATION STATEMENT...
SPOTTER ACTIVATION MAY BE NEEDED LATE THIS AFTERNOON INTO
TONIGHT.
&&
COMPLETE FORECAST INFORMATION IS AVAILABLE ON THE NWS CHICAGO
WEBPAGE: WEATHER.GOV/CHICAGO
