NORTHEAST ILLINOIS AND NORTHWEST INDIANA.
.DAY ONE...TODAY AND TONIGHT.
WEATHER HAZARDS EXPECTED:
THUNDERSTORMS...SOME COULD PRODUCE:
DAMAGING WINDS IN EXCESS OF 60 MPH.
HAIL TO THE SIZE OF QUARTERS.
ISOLATED TORNADOES.
FREQUENT CLOUD TO GROUND LIGHTNING.
HEAVY RAIN.
AREAS AFFECTED AND TIMING:
A THUNDERSTORM COMPLEX OVER EASTERN IOWA THIS MORNING WILL DROP
ACROSS NORTHERN ILLINOIS EARLY THIS MORNING. THESE STORMS ARE
EXPECTED TO BE WEAKENING...AND ANY LINGERING SEVERE THREAT SHOULD
DIMINISH SHORTLY AFTER SUNRISE.
ADDITIONAL STRONG TO SEVERE THUNDERSTORMS ARE EXPECTED TO DEVELOP
ACROSS NORTHERN ILLINOIS LATE THIS AFTERNOON AND EVENING AND DROP
SOUTHEAST ACROSS THE OUTLOOK AREA.
DISCUSSION:
AN ONGOING THUNDERSTORM COMPLEX OVER EASTERN IOWA EARLY THIS
MORNING IS EXPECTED TO PUSH EAST-SOUTHEAST INTO NORTHERN ILLINOIS.
THERE MAY BE A LINGERING SEVERE WEATHER THREAT WITH THESE
THUNDERSTORMS AS THEY ENTER THE FAR NORTHWEST PORTIONS OF THE
OUTLOOK AREA...AREAS WEST OF A LINE FROM BELVIDERE TO
DIXON...HOWEVER THEY ARE EXPECTED TO BE IN A WEAKENING STATE...AND
THE THREAT SHOULD DIMINISH SHORTLY AFTER DAYBREAK.
ADDITIONAL THUNDERSTORMS ARE EXPECTED TO DEVELOP LATE THIS
AFTERNOON AND EVENING ALONG TRAILING OUTFLOW BOUNDARIES FROM THIS
MORNINGS THUNDERSTORMS. SHOULD CLOUDS CLEAR OUT ENOUGH FOR THE
ATMOSPHERE DESTABILIZE...STRONG WINDS ALOFT WILL ALLOW STORMS TO
BECOME SEVERE.
.DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY.
THUNDERSTORMS ARE LIKELY AGAIN ON WEDNESDAY. THERE IS A SLIGHT
RISK THAT SOME STORMS MAY BE SEVERE...PARTICULARLY OVER EAST
CENTRAL ILLINOIS AND NORTHWEST INDIANA. THE GREATEST THREAT WITH
THESE STORMS WILL BE DAMAGING WINDS AND LARGE HAIL. LOCALLY HEAVY
RAINFALL WILL BE POSSIBLE AS WELL.
THERE IS A SLIGHT CHANCE OF THUNDERSTORMS SATURDAY NIGHT INTO
SUNDAY ACROSS PORTIONS OF NORTHERN ILLINOIS. THERE WILL BE A
CHANCE OF THUNDERSTORMS ACROSS THE ENTIRE AREA MONDAY.
.SPOTTER INFORMATION STATEMENT...
SPOTTER ACTIVATION MAY BE NECESSARY.
&&
COMPLETE FORECAST INFORMATION IS AVAILABLE ON THE NWS CHICAGO
WEBPAGE: WEATHER.GOV/CHICAGO
