Hazardous Weather Outlook

THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTH CENTRAL ILLINOIS...
NORTHEAST ILLINOIS AND NORTHWEST INDIANA.

.DAY ONE...TONIGHT.

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY.

THERE IS A CHANCE OF THUNDERSTORMS MONDAY...MAINLY NORTH OF
A LINE FROM ROCKFORD TO JOLIET TO VALPARAISO.

THUNDERSTORMS ARE POSSIBLE ACROSS THE ENTIRE AREA LATE TUESDAY
AFTERNOON THROUGH EARLY WEDNESDAY MORNING. SOME OF THESE
THUNDERSTORMS MAY BECOME SEVERE WITH DAMAGING WIND GUSTS. HEAVY
RAIN WILL ALSO BE POSSIBLE WITH THESE THUNDERSTORMS.

THERE IS ANOTHER CHANCE OF THUNDERSTORMS THURSDAY AFTERNOON
THROUGH EARLY SATURDAY MORNING.

THE ILLINOIS ENVIRONMENTAL PROTECTION AGENCY HAS DECLARED AN AIR
POLLUTION ACTION DAY FOR MONDAY.

THE INDIANA DEPARTMENT OF ENVIRONMENTAL MANAGEMENT HAS DECLARED
ACTION DAYS FOR SUNDAY AND MONDAY.

HEAT INDICES MAY APPROACH 105 DEGREES MONDAY...MAINLY SOUTH OF A
PERU TO RENSSELAER LINE.

HEAT INDICES MAY EXCEED 105 DEGREES MUCH OF THE AREA TUESDAY.

THERE IS AN INCREASED RISK OF RIP CURRENTS ALONG THE INDIANA
SHORE OF LAKE MICHIGAN WEDNESDAY.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION WILL NOT BE NECESSARY THROUGH TONIGHT.

&&

COMPLETE FORECAST INFORMATION IS AVAILABLE ON THE NWS CHICAGO
WEBPAGE: WEATHER.GOV/CHICAGO

Zone Forecast

.TONIGHT...PARTLY CLOUDY. PATCHY FOG AFTER MIDNIGHT. LOWS IN THE
LOWER 70S. SOUTHWEST WINDS AROUND 10 MPH IN THE EVENING BECOMING
LIGHT AND VARIABLE AFTER MIDNIGHT.
.MONDAY...PARTLY CLOUDY WITH A 20 PERCENT CHANCE OF SHOWERS AND
THUNDERSTORMS. HIGHS AROUND 90. HIGHEST HEAT INDEX READINGS 95 TO
100 IN THE AFTERNOON. LIGHT AND VARIABLE WINDS.
.MONDAY NIGHT...PARTLY CLOUDY. LOWS IN THE LOWER 70S. LIGHT AND
VARIABLE WINDS UNTIL EARLY MORNING BECOMING SOUTH AROUND 10 MPH
DURING THE PREDAWN HOURS.
.TUESDAY...PARTLY SUNNY. A 40 PERCENT CHANCE OF SHOWERS AND
THUNDERSTORMS IN THE AFTERNOON. HIGHS AROUND 90. HIGHEST HEAT
INDEX READINGS 100 TO 105 IN THE AFTERNOON. SOUTHWEST WINDS 10 TO
15 MPH.
.TUESDAY NIGHT...PARTLY CLOUDY. SHOWERS AND THUNDERSTORMS LIKELY
IN THE EVENING...THEN A CHANCE OF SHOWERS AND THUNDERSTORMS AFTER
MIDNIGHT. LOWS IN THE LOWER 70S. WEST WINDS 10 TO 15 MPH IN THE
EVENING BECOMING NORTHWEST AFTER MIDNIGHT. CHANCE OF
PRECIPITATION 60 PERCENT.
.WEDNESDAY...MOSTLY SUNNY. HIGHS IN THE MID 80S.
.WEDNESDAY NIGHT...MOSTLY CLEAR. LOWS IN THE UPPER 60S.
.THURSDAY...PARTLY CLOUDY WITH A 20 PERCENT CHANCE OF SHOWERS AND
THUNDERSTORMS. HIGHS IN THE LOWER 80S.
.THURSDAY NIGHT...PARTLY CLOUDY WITH A 50 PERCENT CHANCE OF
SHOWERS AND THUNDERSTORMS. LOWS IN THE UPPER 60S.
.FRIDAY...PARTLY SUNNY WITH A 40 PERCENT CHANCE OF SHOWERS AND
THUNDERSTORMS. HIGHS AROUND 80.
.FRIDAY NIGHT...MOSTLY CLEAR. LOWS IN THE MID 60S.
.SATURDAY AND SATURDAY NIGHT...PARTLY CLOUDY WITH A 20 PERCENT
CHANCE OF SHOWERS AND THUNDERSTORMS. HIGHS IN THE LOWER 80S. LOWS
IN THE MID 60S.
.SUNDAY...PARTLY CLOUDY WITH A 30 PERCENT CHANCE OF SHOWERS AND
THUNDERSTORMS. HIGHS IN THE LOWER 80S.

Hazardous Weather Outlook

THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTH CENTRAL ILLINOIS...
NORTHEAST ILLINOIS AND NORTHWEST INDIANA.

.DAY ONE...THIS AFTERNOON AND TONIGHT.

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY.

THERE IS A CHANCE OF THUNDERSTORMS MONDAY...MAINLY NORTH OF
INTERSTATE 80.

THUNDERSTORMS ARE POSSIBLE ACROSS THE ENTIRE AREA LATE TUESDAY
AFTERNOON INTO WEDNESDAY MORNING. SOME OF THESE THUNDERSTORMS MAY
BECOME SEVERE WITH DAMAGING WIND GUSTS. HEAVY RAIN WILL ALSO BE
POSSIBLE WITH THESE THUNDERSTORMS. THERE IS ANOTHER CHANCE OF
THUNDERSTORMS THURSDAY NIGHT THROUGH FRIDAY EVENING.

HEAT INDICES COULD REACH 105 DEGREES MONDAY...MAINLY SOUTH AND
WEST OF A ROCKFORD TO FOWLER LINE. HEAT INDICES COULD REACH 105
DEGREES ACROSS THE ENTIRE AREA TUESDAY.

THERE IS AN INCREASED RISK OF RIP CURRENTS ALONG THE INDIANA
SHORE OF LAKE MICHIGAN WEDNESDAY.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION WILL NOT BE NECESSARY THROUGH TONIGHT.

&&

COMPLETE FORECAST INFORMATION IS AVAILABLE ON THE NWS CHICAGO
WEBPAGE: WEATHER.GOV/CHICAGO

Zone Forecast

.REST OF TODAY...PARTLY CLOUDY. HIGHS AROUND 90. PEAK AFTERNOON
HEAT INDEX READINGS 95 TO 100. LIGHT AND VARIABLE WINDS LATE IN
THE MORNING BECOMING SOUTHWEST AROUND 10 MPH IN THE AFTERNOON.
.TONIGHT...PARTLY CLOUDY. LOWS AROUND 70. LIGHT AND VARIABLE
WINDS.
.MONDAY...PARTLY CLOUDY WITH A 20 PERCENT CHANCE OF SHOWERS AND
THUNDERSTORMS. HIGHS AROUND 90. HIGHEST HEAT INDEX READINGS
100 TO 105 IN THE AFTERNOON. LIGHT AND VARIABLE WINDS.
.MONDAY NIGHT...MOSTLY CLEAR. LOWS IN THE LOWER 70S. LIGHT AND
VARIABLE WINDS IN THE EVENING BECOMING SOUTH AROUND 10 MPH AFTER
MIDNIGHT.
.TUESDAY...PARTLY CLOUDY. A 40 PERCENT CHANCE OF SHOWERS AND
THUNDERSTORMS IN THE AFTERNOON. HIGHS IN THE LOWER 90S. HIGHEST
HEAT INDEX READINGS 100 TO 105 IN THE AFTERNOON. SOUTHWEST WINDS
10 TO 15 MPH.
.TUESDAY NIGHT...PARTLY CLOUDY. SHOWERS AND THUNDERSTORMS LIKELY
IN THE EVENING...THEN A SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS AFTER MIDNIGHT. LOWS IN THE UPPER 60S. CHANCE OF
PRECIPITATION 60 PERCENT.
.WEDNESDAY...MOSTLY SUNNY. HIGHS IN THE LOWER 80S.
.WEDNESDAY NIGHT...MOSTLY CLEAR. LOWS IN THE MID 60S.
.THURSDAY...MOSTLY SUNNY. HIGHS IN THE LOWER 80S.
.THURSDAY NIGHT...PARTLY CLOUDY WITH A 50 PERCENT CHANCE OF
SHOWERS AND THUNDERSTORMS. LOWS IN THE UPPER 60S.
.FRIDAY...PARTLY SUNNY WITH A 40 PERCENT CHANCE OF SHOWERS AND
THUNDERSTORMS. HIGHS IN THE LOWER 80S.
.FRIDAY NIGHT...PARTLY CLOUDY WITH A 20 PERCENT CHANCE OF SHOWERS
AND THUNDERSTORMS. LOWS IN THE UPPER 60S.
.SATURDAY...PARTLY CLOUDY. HIGHS IN THE MID 80S.

Hazardous Weather Outlook

THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTH CENTRAL ILLINOIS...
NORTHEAST ILLINOIS AND NORTHWEST INDIANA.

.DAY ONE...TODAY AND TONIGHT.

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY.

THERE IS A CHANCE OF THUNDERSTORMS MONDAY...MAINLY NORTH OF
INTERSTATE 80.

THUNDERSTORMS ARE POSSIBLE ACROSS THE ENTIRE AREA LATE TUESDAY
AFTERNOON INTO WEDNESDAY MORNING. SOME OF THESE THUNDERSTORMS MAY
BECOME SEVERE WITH DAMAGING WIND GUSTS. HEAVY RAIN WILL ALSO BE
POSSIBLE WITH THESE THUNDERSTORMS. THERE IS ANOTHER CHANCE OF
THUNDERSTORMS THURSDAY NIGHT THROUGH FRIDAY EVENING.

HEAT INDICES COULD REACH 105 DEGREES MONDAY...MAINLY SOUTH AND
WEST OF A ROCKFORD TO FOWLER LINE. HEAT INDICES COULD REACH 105
DEGREES ACROSS THE ENTIRE AREA TUESDAY.

THERE IS AN INCREASED RISK OF RIP CURRENTS ALONG THE INDIANA
SHORE OF LAKE MICHIGAN WEDNESDAY.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION WILL NOT BE NECESSARY THROUGH TONIGHT.

&&

COMPLETE FORECAST INFORMATION IS AVAILABLE ON THE NWS CHICAGO
WEBPAGE: WEATHER.GOV/CHICAGO

Zone Forecast

.TODAY...MOSTLY SUNNY. HIGHS AROUND 90. PEAK AFTERNOON HEAT INDEX
READINGS 95 TO 100. LIGHT AND VARIABLE WINDS IN THE MORNING
BECOMING SOUTHWEST AROUND 10 MPH IN THE AFTERNOON.
.TONIGHT...PARTLY CLOUDY. LOWS AROUND 70. LIGHT AND VARIABLE
WINDS.
.MONDAY...PARTLY CLOUDY WITH A 20 PERCENT CHANCE OF SHOWERS AND
THUNDERSTORMS. HIGHS AROUND 90. HIGHEST HEAT INDEX READINGS
100 TO 105 IN THE AFTERNOON. LIGHT AND VARIABLE WINDS.
.MONDAY NIGHT...MOSTLY CLEAR. LOWS IN THE LOWER 70S. LIGHT AND
VARIABLE WINDS IN THE EVENING BECOMING SOUTH AROUND 10 MPH AFTER
MIDNIGHT.
.TUESDAY...PARTLY CLOUDY. A 40 PERCENT CHANCE OF SHOWERS AND
THUNDERSTORMS IN THE AFTERNOON. HIGHS IN THE LOWER 90S. HIGHEST
HEAT INDEX READINGS 100 TO 105 IN THE AFTERNOON. SOUTHWEST WINDS
10 TO 15 MPH.
.TUESDAY NIGHT...PARTLY CLOUDY. SHOWERS AND THUNDERSTORMS LIKELY
IN THE EVENING...THEN A SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS AFTER MIDNIGHT. LOWS IN THE UPPER 60S. CHANCE OF
PRECIPITATION 60 PERCENT.
.WEDNESDAY...MOSTLY SUNNY. HIGHS IN THE LOWER 80S.
.WEDNESDAY NIGHT...MOSTLY CLEAR. LOWS IN THE MID 60S.
.THURSDAY...MOSTLY SUNNY. HIGHS IN THE LOWER 80S.
.THURSDAY NIGHT...PARTLY CLOUDY WITH A 50 PERCENT CHANCE OF
SHOWERS AND THUNDERSTORMS. LOWS IN THE UPPER 60S.
.FRIDAY...PARTLY SUNNY WITH A 40 PERCENT CHANCE OF SHOWERS AND
THUNDERSTORMS. HIGHS IN THE LOWER 80S.
.FRIDAY NIGHT...PARTLY CLOUDY WITH A 20 PERCENT CHANCE OF SHOWERS
AND THUNDERSTORMS. LOWS IN THE UPPER 60S.
.SATURDAY...PARTLY CLOUDY. HIGHS IN THE MID 80S.

Zone Forecast

.REST OF TONIGHT...MOSTLY CLEAR. PATCHY FOG AFTER MIDNIGHT. LOWS
IN THE UPPER 60S. LIGHT AND VARIABLE WINDS.
.SUNDAY...PARTLY CLOUDY. HIGHS AROUND 90. PEAK AFTERNOON HEAT
INDEX READINGS 95 TO 100. LIGHT AND VARIABLE WINDS IN THE MORNING
BECOMING SOUTHWEST AROUND 10 MPH IN THE AFTERNOON.
.SUNDAY NIGHT...PARTLY CLOUDY. LOWS IN THE LOWER 70S. LIGHT AND
VARIABLE WINDS.
.MONDAY...PARTLY CLOUDY WITH A 20 PERCENT CHANCE OF SHOWERS AND
THUNDERSTORMS. HIGHS IN THE UPPER 80S. PEAK AFTERNOON HEAT INDEX
READINGS 95 TO 100. LIGHT AND VARIABLE WINDS.
.MONDAY NIGHT...PARTLY CLOUDY. LOWS IN THE LOWER 70S. LIGHT AND
VARIABLE WINDS IN THE EVENING BECOMING SOUTH AROUND 10 MPH AFTER
MIDNIGHT.
.TUESDAY...PARTLY CLOUDY. A 50 PERCENT CHANCE OF SHOWERS AND
THUNDERSTORMS IN THE AFTERNOON. HIGHS IN THE LOWER 90S.
.TUESDAY NIGHT...PARTLY CLOUDY WITH A 40 PERCENT CHANCE OF
SHOWERS AND THUNDERSTORMS. LOWS IN THE UPPER 60S.
.WEDNESDAY...MOSTLY SUNNY. HIGHS IN THE LOWER 80S.
.WEDNESDAY NIGHT AND THURSDAY...MOSTLY CLEAR. LOWS IN THE MID
60S. HIGHS IN THE LOWER 80S.
.THURSDAY NIGHT AND FRIDAY...PARTLY CLOUDY WITH A 20 PERCENT
CHANCE OF SHOWERS AND THUNDERSTORMS. LOWS IN THE MID 60S. HIGHS
IN THE MID 80S.
.FRIDAY NIGHT AND SATURDAY...PARTLY CLOUDY. LOWS IN THE MID 60S.
HIGHS IN THE MID 80S.

Zone Forecast

.REST OF TONIGHT...MOSTLY CLEAR. LOWS IN THE UPPER 60S. LIGHT AND
VARIABLE WINDS.
.SUNDAY...PARTLY CLOUDY. HIGHS AROUND 90. PEAK AFTERNOON HEAT
INDEX READINGS 95 TO 100. LIGHT AND VARIABLE WINDS EARLY IN THE
MORNING BECOMING SOUTHWEST AROUND 10 MPH IN THE LATE MORNING AND
AFTERNOON.
.SUNDAY NIGHT...PARTLY CLOUDY. LOWS IN THE LOWER 70S. LIGHT AND
VARIABLE WINDS.
.MONDAY...PARTLY CLOUDY WITH A 20 PERCENT CHANCE OF SHOWERS AND
THUNDERSTORMS. HIGHS IN THE UPPER 80S. PEAK AFTERNOON HEAT INDEX
READINGS 95 TO 100. LIGHT AND VARIABLE WINDS.
.MONDAY NIGHT...PARTLY CLOUDY. LOWS IN THE LOWER 70S. LIGHT AND
VARIABLE WINDS IN THE EVENING BECOMING SOUTH AROUND 10 MPH AFTER
MIDNIGHT.
.TUESDAY...PARTLY CLOUDY. A 50 PERCENT CHANCE OF SHOWERS AND
THUNDERSTORMS IN THE AFTERNOON. HIGHS IN THE LOWER 90S.
.TUESDAY NIGHT...PARTLY CLOUDY WITH A 40 PERCENT CHANCE OF
SHOWERS AND THUNDERSTORMS. LOWS IN THE UPPER 60S.
.WEDNESDAY...MOSTLY SUNNY. HIGHS IN THE LOWER 80S.
.WEDNESDAY NIGHT AND THURSDAY...MOSTLY CLEAR. LOWS IN THE MID
60S. HIGHS IN THE LOWER 80S.
.THURSDAY NIGHT AND FRIDAY...PARTLY CLOUDY WITH A 20 PERCENT
CHANCE OF SHOWERS AND THUNDERSTORMS. LOWS IN THE MID 60S. HIGHS
IN THE MID 80S.
.FRIDAY NIGHT AND SATURDAY...PARTLY CLOUDY. LOWS IN THE MID 60S.
HIGHS IN THE MID 80S.

Hazardous Weather Outlook

THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTH CENTRAL ILLINOIS...
NORTHEAST ILLINOIS AND NORTHWEST INDIANA.

.DAY ONE...TONIGHT.

PORTIONS OF THE DES PLAINES RIVER WILL REMAIN AT BANK FULL.

.DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY.

THERE IS A CHANCE OF THUNDERSTORMS MONDAY AFTERNOON...MAINLY
NORTH OF INTERSTATE 80.

THUNDERSTORMS ARE POSSIBLE ACROSS THE ENTIRE AREA TUESDAY
AFTERNOON INTO WEDNESDAY MORNING. SOME OF THESE THUNDERSTORMS MAY
PRODUCE HEAVY RAIN AND STRONG GUSTY WINDS. THERE IS ANOTHER CHANCE OF
THUNDERSTORMS THURSDAY NIGHT THROUGH FRIDAY.

HEAT INDICES COULD REACH 105 DEGREES MONDAY AND TUESDAY...MAINLY
SOUTH AND WEST OF A ROCKFORD TO FOWLER LINE.

PORTIONS OF THE DES PLAINES RIVER IS EXPECTED TO REMAIN AT BANK
FULL THROUGH MONDAY.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION WILL NOT BE NECESSARY THROUGH TONIGHT.

&&

COMPLETE FORECAST INFORMATION IS AVAILABLE ON THE NWS CHICAGO
WEBPAGE: WEATHER.GOV/CHICAGO

Zone Forecast

.TONIGHT...MOSTLY CLEAR. LOWS IN THE UPPER 60S. LIGHT AND
VARIABLE WINDS.
.SUNDAY...PARTLY CLOUDY. HIGHS AROUND 90. LIGHT AND VARIABLE
WINDS EARLY IN THE MORNING BECOMING SOUTHWEST AROUND 10 MPH IN
THE LATE MORNING AND AFTERNOON.
.SUNDAY NIGHT...PARTLY CLOUDY. LOWS IN THE LOWER 70S. LIGHT AND
VARIABLE WINDS.
.MONDAY...PARTLY CLOUDY WITH A 20 PERCENT CHANCE OF SHOWERS AND
THUNDERSTORMS. HIGHS IN THE UPPER 80S. PEAK AFTERNOON HEAT INDEX
READINGS 95 TO 100. LIGHT AND VARIABLE WINDS.
.MONDAY NIGHT...PARTLY CLOUDY. LOWS IN THE LOWER 70S. LIGHT AND
VARIABLE WINDS IN THE EVENING BECOMING SOUTH AROUND 10 MPH AFTER
MIDNIGHT.
.TUESDAY...PARTLY CLOUDY. A 50 PERCENT CHANCE OF SHOWERS AND
THUNDERSTORMS IN THE AFTERNOON. HIGHS IN THE LOWER 90S.
.TUESDAY NIGHT...PARTLY CLOUDY WITH A 40 PERCENT CHANCE OF
SHOWERS AND THUNDERSTORMS. LOWS IN THE UPPER 60S.
.WEDNESDAY...MOSTLY SUNNY. HIGHS IN THE LOWER 80S.
.WEDNESDAY NIGHT AND THURSDAY...MOSTLY CLEAR. LOWS IN THE MID
60S. HIGHS IN THE LOWER 80S.
.THURSDAY NIGHT AND FRIDAY...PARTLY CLOUDY WITH A 20 PERCENT
CHANCE OF SHOWERS AND THUNDERSTORMS. LOWS IN THE MID 60S. HIGHS
IN THE MID 80S.
.FRIDAY NIGHT AND SATURDAY...PARTLY CLOUDY. LOWS IN THE MID 60S.
HIGHS IN THE MID 80S.

Zone Forecast

.THIS AFTERNOON...SUNNY. TEMPERATURES NEARLY STEADY IN THE UPPER
80S. LIGHT AND VARIABLE WINDS.
.TONIGHT...CLEAR. LOWS IN THE UPPER 60S. LIGHT AND VARIABLE
WINDS.
.SUNDAY...PARTLY CLOUDY. A 20 PERCENT CHANCE OF SHOWERS AND
THUNDERSTORMS IN THE AFTERNOON. HIGHS AROUND 90. LIGHT AND
VARIABLE WINDS EARLY IN THE MORNING BECOMING SOUTHWEST AROUND
10 MPH IN THE LATE MORNING AND AFTERNOON.
.SUNDAY NIGHT...PARTLY CLOUDY. LOWS IN THE LOWER 70S. LIGHT AND
VARIABLE WINDS.
.MONDAY...PARTLY CLOUDY. HIGHS IN THE UPPER 80S. HIGHEST HEAT
INDEX READINGS 95 TO 100 IN THE AFTERNOON. LIGHT AND VARIABLE
WINDS.
.MONDAY NIGHT...PARTLY CLOUDY. LOWS IN THE LOWER 70S.
.TUESDAY...PARTLY CLOUDY WITH A 20 PERCENT CHANCE OF SHOWERS AND
THUNDERSTORMS. HIGHS IN THE LOWER 90S.
.TUESDAY NIGHT...PARTLY CLOUDY WITH A 40 PERCENT CHANCE OF
SHOWERS AND THUNDERSTORMS. LOWS IN THE LOWER 70S.
.WEDNESDAY...MOSTLY SUNNY. HIGHS IN THE MID 80S.
.WEDNESDAY NIGHT...MOSTLY CLEAR WITH A 20 PERCENT CHANCE OF
SHOWERS AND THUNDERSTORMS. LOWS IN THE MID 60S.
.THURSDAY...PARTLY SUNNY WITH A 40 PERCENT CHANCE OF SHOWERS AND
THUNDERSTORMS. HIGHS AROUND 80.
.THURSDAY NIGHT...MOSTLY CLOUDY WITH A 50 PERCENT CHANCE OF
SHOWERS AND THUNDERSTORMS. LOWS IN THE UPPER 60S.
.FRIDAY...PARTLY CLOUDY WITH A 30 PERCENT CHANCE OF SHOWERS AND
THUNDERSTORMS. HIGHS IN THE LOWER 80S.

Hazardous Weather Outlook

THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTH CENTRAL ILLINOIS...
NORTHEAST ILLINOIS AND NORTHWEST INDIANA.

.DAY ONE...THIS AFTERNOON AND TONIGHT.

PORTIONS OF THE DES PLAINES RIVER WILL REMAIN AT BANK FULL.

.DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY.

THERE IS A CHANCE OF THUNDERSTORMS SUNDAY AFTERNOON AND AGAIN
MONDAY AFTERNOON...MAINLY NORTH OF INTERSTATE 80.

THUNDERSTORMS ARE POSSIBLE ACROSS THE ENTIRE AREA TUESDAY
AFTERNOON INTO WEDNESDAY MORNING. SOME OF THESE THUNDERSTORMS MAY
PRODUCE HEAVY RAIN. THERE IS ANOTHER CHANCE OF THUNDERSTORMS
WEDNESDAY NIGHT THROUGH FRIDAY.

HEAT INDICES COULD REACH 105 DEGREES MONDAY AND TUESDAY...MAINLY
SOUTH AND WEST OF A ROCKFORD TO FOWLER LINE.

PORTIONS OF THE DES PLAINES RIVER IS EXPECTED TO REMAIN AT BANK
FULL THROUGH MONDAY.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION WILL NOT BE NECESSARY THROUGH TONIGHT.

&&

COMPLETE FORECAST INFORMATION IS AVAILABLE ON THE NWS CHICAGO
WEBPAGE: WEATHER.GOV/CHICAGO

Zone Forecast

.REST OF TODAY...SUNNY. HIGHS AROUND 90. LIGHT AND VARIABLE
WINDS.
.TONIGHT...CLEAR. LOWS IN THE UPPER 60S. LIGHT AND VARIABLE
WINDS.
.SUNDAY...PARTLY CLOUDY. A 20 PERCENT CHANCE OF SHOWERS AND
THUNDERSTORMS IN THE AFTERNOON. HIGHS AROUND 90. LIGHT AND
VARIABLE WINDS EARLY IN THE MORNING BECOMING SOUTHWEST AROUND
10 MPH IN THE LATE MORNING AND AFTERNOON.
.SUNDAY NIGHT...PARTLY CLOUDY. LOWS IN THE LOWER 70S. LIGHT AND
VARIABLE WINDS.
.MONDAY...PARTLY CLOUDY. HIGHS IN THE UPPER 80S. HIGHEST HEAT
INDEX READINGS 95 TO 100 IN THE AFTERNOON. LIGHT AND VARIABLE
WINDS.
.MONDAY NIGHT...PARTLY CLOUDY. LOWS IN THE LOWER 70S.
.TUESDAY...PARTLY CLOUDY WITH A 20 PERCENT CHANCE OF SHOWERS AND
THUNDERSTORMS. HIGHS IN THE LOWER 90S.
.TUESDAY NIGHT...PARTLY CLOUDY WITH A 40 PERCENT CHANCE OF
SHOWERS AND THUNDERSTORMS. LOWS IN THE LOWER 70S.
.WEDNESDAY...MOSTLY SUNNY. HIGHS IN THE MID 80S.
.WEDNESDAY NIGHT...MOSTLY CLEAR WITH A 20 PERCENT CHANCE OF
SHOWERS AND THUNDERSTORMS. LOWS IN THE MID 60S.
.THURSDAY...PARTLY SUNNY WITH A 40 PERCENT CHANCE OF SHOWERS AND
THUNDERSTORMS. HIGHS AROUND 80.
.THURSDAY NIGHT...MOSTLY CLOUDY WITH A 50 PERCENT CHANCE OF
SHOWERS AND THUNDERSTORMS. LOWS IN THE UPPER 60S.
.FRIDAY...PARTLY CLOUDY WITH A 30 PERCENT CHANCE OF SHOWERS AND
THUNDERSTORMS. HIGHS IN THE LOWER 80S.

Hazardous Weather Outlook

THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTH CENTRAL ILLINOIS...
NORTHEAST ILLINOIS AND NORTHWEST INDIANA.

.DAY ONE...TODAY AND TONIGHT.

PATCHY DENSE FOG WILL BE POSSIBLE THIS MORNING...MAINLY SOUTH
OF INTERSTATE 80.

PORTIONS OF THE DES PLAINES...EAST BRANCH DU PAGE...AND FOX
RIVERS WILL REMAIN AT BANK FULL.

.DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY.

THERE IS A CHANCE OF THUNDERSTORMS SUNDAY AFTERNOON AND AGAIN
MONDAY AFTERNOON...MAINLY NORTH OF INTERSTATE 80.

THUNDERSTORMS ARE POSSIBLE ACROSS THE ENTIRE AREA TUESDAY
AFTERNOON INTO WEDNESDAY MORNING. SOME OF THESE THUNDERSTORMS
MAY PRODUCE HEAVY RAIN. THERE IS ANOTHER CHANCE OF THUNDERSTORMS
WEDNESDAY NIGHT THROUGH FRIDAY.

HEAT INDICES COULD REACH 105 DEGREES MONDAY AND TUESDAY...MAINLY
SOUTH AND WEST OF A ROCKFORD TO FOWLER LINE.

PORTIONS OF THE DES PLAINES AND FOX RIVERS ARE EXPECTED TO
REMAIN AT BANK FULL THROUGH MONDAY.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION WILL NOT BE NECESSARY THROUGH TONIGHT.

&&

COMPLETE FORECAST INFORMATION IS AVAILABLE ON THE NWS CHICAGO
WEBPAGE: WEATHER.GOV/CHICAGO

Zone Forecast

.TODAY...SUNNY. AREAS OF FOG EARLY IN THE MORNING. HIGHS AROUND
90. LIGHT AND VARIABLE WINDS.
.TONIGHT...CLEAR. LOWS IN THE UPPER 60S. LIGHT AND VARIABLE
WINDS.
.SUNDAY...PARTLY CLOUDY. A 20 PERCENT CHANCE OF SHOWERS AND
THUNDERSTORMS IN THE AFTERNOON. HIGHS AROUND 90. LIGHT AND
VARIABLE WINDS EARLY IN THE MORNING BECOMING SOUTHWEST AROUND
10 MPH IN THE LATE MORNING AND AFTERNOON.
.SUNDAY NIGHT...PARTLY CLOUDY. LOWS IN THE LOWER 70S. LIGHT AND
VARIABLE WINDS.
.MONDAY...PARTLY CLOUDY. HIGHS IN THE UPPER 80S. HIGHEST HEAT
INDEX READINGS 95 TO 100 IN THE AFTERNOON. LIGHT AND VARIABLE
WINDS.
.MONDAY NIGHT...PARTLY CLOUDY. LOWS IN THE LOWER 70S.
.TUESDAY...PARTLY CLOUDY WITH A 20 PERCENT CHANCE OF SHOWERS AND
THUNDERSTORMS. HIGHS IN THE LOWER 90S.
.TUESDAY NIGHT...PARTLY CLOUDY WITH A 40 PERCENT CHANCE OF
SHOWERS AND THUNDERSTORMS. LOWS IN THE LOWER 70S.
.WEDNESDAY...MOSTLY SUNNY. HIGHS IN THE MID 80S.
.WEDNESDAY NIGHT...MOSTLY CLEAR WITH A 20 PERCENT CHANCE OF
SHOWERS AND THUNDERSTORMS. LOWS IN THE MID 60S.
.THURSDAY...PARTLY SUNNY WITH A 40 PERCENT CHANCE OF SHOWERS AND
THUNDERSTORMS. HIGHS AROUND 80.
.THURSDAY NIGHT...MOSTLY CLOUDY WITH A 50 PERCENT CHANCE OF
SHOWERS AND THUNDERSTORMS. LOWS IN THE UPPER 60S.
.FRIDAY...PARTLY CLOUDY WITH A 30 PERCENT CHANCE OF SHOWERS AND
THUNDERSTORMS. HIGHS IN THE LOWER 80S.

Zone Forecast

.REST OF TONIGHT...CLEAR TO PARTY CLOUDY. AREAS OF FOG AFTER
MIDNIGHT. LOWS IN THE MID 60S. LIGHT AND VARIABLE WINDS.
.SATURDAY...SUNNY. HIGHS IN THE UPPER 80S. LIGHT AND VARIABLE
WINDS.
.SATURDAY NIGHT...MOSTLY CLEAR. LOWS IN THE MID 60S. LIGHT AND
VARIABLE WINDS.
.SUNDAY...PARTLY CLOUDY. A 20 PERCENT CHANCE OF SHOWERS AND
THUNDERSTORMS IN THE AFTERNOON. HIGHS IN THE UPPER 80S. SOUTHWEST
WINDS AROUND 10 MPH.
.SUNDAY NIGHT...PARTLY CLOUDY WITH A 20 PERCENT CHANCE OF SHOWERS
AND THUNDERSTORMS. LOWS AROUND 70. LIGHT AND VARIABLE WINDS.
.MONDAY...PARTLY SUNNY WITH A 20 PERCENT CHANCE OF SHOWERS AND
THUNDERSTORMS. HIGHS IN THE UPPER 80S.
.MONDAY NIGHT...PARTLY CLOUDY. LOWS IN THE LOWER 70S.
.TUESDAY...PARTLY SUNNY WITH A 30 PERCENT CHANCE OF SHOWERS AND
THUNDERSTORMS. HIGHS IN THE UPPER 80S.
.TUESDAY NIGHT...PARTLY CLOUDY WITH A 30 PERCENT CHANCE OF
SHOWERS AND THUNDERSTORMS. LOWS IN THE UPPER 60S.
.WEDNESDAY THROUGH FRIDAY...PARTLY CLOUDY WITH A 20 PERCENT
CHANCE OF SHOWERS AND THUNDERSTORMS. HIGHS IN THE MID 80S. LOWS
IN THE MID 60S.

Hazardous Weather Outlook

THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTH CENTRAL ILLINOIS...
NORTHEAST ILLINOIS AND NORTHWEST INDIANA.

.DAY ONE...TONIGHT.

SCATTERED THUNDERSTORMS WILL STILL BE POSSIBLE LATE THIS AFTERNOON
INTO THE EARLY EVENING MAINLY SOUTH OF A LINE FROM STREATOR TO
KANKAKEE IN ILLINOIS...TO DUNNS BRIDGE IN INDIANA. ALTHOUGH
THUNDERSTORMS ARE NOT ANTICIPATED TO BE SEVERE...THE STRONGER
THUNDERSTORMS COULD PRODUCE GUSTY WINDS AND BRIEF HEAVY DOWNPOURS.

AREAS ALONG THE DES PLAINES...EAST BRANCH DU PAGE...AND FOX
RIVERS WILL REMAIN AT BANK FULL.

AREAS OF FOG WILL BE POSSIBLE LATE TONIGHT THROUGH EARLY SATURDAY
MORNING.

.DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY.

THUNDERSTORMS WILL BE POSSIBLE SUNDAY AFTERNOON THROUGH EARLY
MONDAY...MAINLY NORTH OF INTERSTATE 80.

THERE IS A CHANCE OF THUNDERSTORMS ACROSS THE ENTIRE AREA TUESDAY
AND TUESDAY NIGHT...AND ONCE AGAIN THURSDAY THROUGH FRIDAY.

AREAS ALONG THE DES PLAINES...EAST BRANCH DU PAGE RIVER...AND FOX
RIVERS WILL REMAIN AT BANK FULL.

HEAT INDICES MAY REACH 105 DEGREES MONDAY AND TUESDAY...MAINLY
SOUTH AND WEST OF A ROCKFORD TO FOWLER LINE.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION WILL NOT BE NECESSARY THROUGH TONIGHT.

&&

COMPLETE FORECAST INFORMATION IS AVAILABLE ON THE NWS CHICAGO
WEBPAGE: WEATHER.GOV/CHICAGO

Zone Forecast

.TONIGHT...MOSTLY CLEAR. AREAS OF FOG AFTER MIDNIGHT. LOWS IN THE
LOWER 60S. LIGHT AND VARIABLE WINDS.
.SATURDAY...SUNNY. HIGHS IN THE UPPER 80S. LIGHT AND VARIABLE
WINDS IN THE MORNING BECOMING SOUTH AROUND 10 MPH IN THE
AFTERNOON.
.SATURDAY NIGHT...MOSTLY CLEAR. LOWS IN THE MID 60S. LIGHT AND
VARIABLE WINDS.
.SUNDAY...PARTLY CLOUDY. A 20 PERCENT CHANCE OF SHOWERS AND
THUNDERSTORMS IN THE AFTERNOON. HIGHS IN THE UPPER 80S. SOUTHWEST
WINDS AROUND 10 MPH.
.SUNDAY NIGHT...PARTLY CLOUDY WITH A 20 PERCENT CHANCE OF SHOWERS
AND THUNDERSTORMS. LOWS AROUND 70. LIGHT AND VARIABLE WINDS.
.MONDAY...PARTLY SUNNY WITH A 20 PERCENT CHANCE OF SHOWERS AND
THUNDERSTORMS. HIGHS IN THE UPPER 80S.
.MONDAY NIGHT...PARTLY CLOUDY. LOWS IN THE LOWER 70S.
.TUESDAY...PARTLY SUNNY WITH A 30 PERCENT CHANCE OF SHOWERS AND
THUNDERSTORMS. HIGHS IN THE UPPER 80S.
.TUESDAY NIGHT...PARTLY CLOUDY WITH A 30 PERCENT CHANCE OF
SHOWERS AND THUNDERSTORMS. LOWS IN THE UPPER 60S.
.WEDNESDAY THROUGH FRIDAY...PARTLY CLOUDY WITH A 20 PERCENT
CHANCE OF SHOWERS AND THUNDERSTORMS. HIGHS IN THE MID 80S. LOWS
IN THE MID 60S.

Zone Forecast

.THIS AFTERNOON...MOSTLY SUNNY. HIGHS IN THE MID 80S. LIGHT AND
VARIABLE WINDS.
.TONIGHT...CLEAR. AREAS OF FOG AFTER MIDNIGHT. LOWS IN THE MID
60S. LIGHT AND VARIABLE WINDS.
.SATURDAY...MOSTLY SUNNY. AREAS OF FOG EARLY IN THE MORNING.
HIGHS IN THE UPPER 80S. LIGHT AND VARIABLE WINDS.
.SATURDAY NIGHT...MOSTLY CLEAR. LOWS IN THE UPPER 60S. LIGHT AND
VARIABLE WINDS.
.SUNDAY...PARTLY CLOUDY. A 20 PERCENT CHANCE OF SHOWERS AND
THUNDERSTORMS IN THE AFTERNOON. HIGHS IN THE UPPER 80S. HIGHEST
HEAT INDEX READINGS 95 TO 100 IN THE AFTERNOON. SOUTHWEST WINDS
AROUND 10 MPH.
.SUNDAY NIGHT...PARTLY CLOUDY WITH A 20 PERCENT CHANCE OF SHOWERS
AND THUNDERSTORMS. LOWS IN THE LOWER 70S.
.MONDAY...PARTLY CLOUDY WITH A 20 PERCENT CHANCE OF SHOWERS AND
THUNDERSTORMS. HIGHS AROUND 90.
.MONDAY NIGHT...PARTLY CLOUDY WITH A 20 PERCENT CHANCE OF SHOWERS
AND THUNDERSTORMS. LOWS IN THE LOWER 70S.
.TUESDAY AND TUESDAY NIGHT...PARTLY CLOUDY WITH A 30 PERCENT
CHANCE OF SHOWERS AND THUNDERSTORMS. HIGHS IN THE UPPER 80S. LOWS
IN THE LOWER 70S.
.WEDNESDAY...PARTLY CLOUDY WITH A 20 PERCENT CHANCE OF SHOWERS
AND THUNDERSTORMS. HIGHS IN THE MID 80S.
.WEDNESDAY NIGHT AND THURSDAY...MOSTLY CLEAR. LOWS IN THE UPPER
60S. HIGHS IN THE MID 80S.

Hazardous Weather Outlook

THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTH CENTRAL ILLINOIS...
NORTHEAST ILLINOIS AND NORTHWEST INDIANA.

.DAY ONE...THIS AFTERNOON AND TONIGHT.

SCATTERED THUNDERSTORMS WILL STILL BE POSSIBLE THIS AFTERNOON
SOUTH OF A LINE FROM STREATOR TO KANKAKEE IN ILLINOIS...TO DUNNS
BRIDGE IN INDIANA. ALTHOUGH THUNDERSTORMS ARE NOT ANTICIPATED TO
BE SEVERE...THE STRONGER THUNDERSTORMS COULD PRODUCE GUSTY WINDS
AND BRIEF HEAVY DOWNPOURS.

AREAS ALONG THE DES PLAINES...EAST BRANCH DU PAGE...AND FOX
RIVERS WILL REMAIN AT BANK FULL.

AREAS OF FOG WILL BE POSSIBLE LATE TONIGHT THROUGH EARLY SATURDAY
MORNING.

.DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY.

THUNDERSTORMS WILL BE POSSIBLE SUNDAY AFTERNOON THROUGH MONDAY
AFTERNOON...MAINLY NORTH OF INTERSTATE 80 AS ANOTHER WEAK COLD
FRONT SAGS INTO NORTHERN ILLINOIS.

THERE IS A CHANCE OF THUNDERSTORMS ACROSS THE ENTIRE AREA FROM
MONDAY NIGHT THROUGH THURSDAY.

AREAS ALONG THE DES PLAINES...EAST BRANCH DU PAGE RIVER...AND FOX
RIVERS WILL REMAIN AT BANK FULL.

HEAT INDICES MAY REACH 105 DEGREES MONDAY AND TUESDAY...MAINLY
SOUTH AND WEST OF A ROCKFORD TO FOWLER LINE.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION WILL NOT BE NECESSARY THROUGH TONIGHT.

&&

COMPLETE FORECAST INFORMATION IS AVAILABLE ON THE NWS CHICAGO
WEBPAGE: WEATHER.GOV/CHICAGO

Zone Forecast

.TODAY...PARTLY SUNNY. AREAS OF FOG EARLY IN THE MORNING. HIGHS
IN THE UPPER 80S. LIGHT AND VARIABLE WINDS EARLY IN THE MORNING
BECOMING NORTH AROUND 10 MPH LATE IN THE MORNING...THEN BECOMING
LIGHT AND VARIABLE IN THE AFTERNOON.
.TONIGHT...CLEAR. AREAS OF FOG AFTER MIDNIGHT. LOWS IN THE MID
60S. LIGHT AND VARIABLE WINDS.
.SATURDAY...MOSTLY SUNNY. AREAS OF FOG EARLY IN THE MORNING.
HIGHS IN THE UPPER 80S. LIGHT AND VARIABLE WINDS.
.SATURDAY NIGHT...MOSTLY CLEAR. LOWS IN THE UPPER 60S. LIGHT AND
VARIABLE WINDS.
.SUNDAY...PARTLY CLOUDY. A 20 PERCENT CHANCE OF SHOWERS AND
THUNDERSTORMS IN THE AFTERNOON. HIGHS IN THE UPPER 80S. HIGHEST
HEAT INDEX READINGS 95 TO 100 IN THE AFTERNOON. SOUTHWEST WINDS
AROUND 10 MPH.
.SUNDAY NIGHT...PARTLY CLOUDY WITH A 20 PERCENT CHANCE OF SHOWERS
AND THUNDERSTORMS. LOWS IN THE LOWER 70S.
.MONDAY...PARTLY CLOUDY WITH A 20 PERCENT CHANCE OF SHOWERS AND
THUNDERSTORMS. HIGHS AROUND 90.
.MONDAY NIGHT...PARTLY CLOUDY WITH A 20 PERCENT CHANCE OF SHOWERS
AND THUNDERSTORMS. LOWS IN THE LOWER 70S.
.TUESDAY AND TUESDAY NIGHT...PARTLY CLOUDY WITH A 30 PERCENT
CHANCE OF SHOWERS AND THUNDERSTORMS. HIGHS IN THE UPPER 80S. LOWS
IN THE LOWER 70S.
.WEDNESDAY...PARTLY CLOUDY WITH A 20 PERCENT CHANCE OF SHOWERS
AND THUNDERSTORMS. HIGHS IN THE MID 80S.
.WEDNESDAY NIGHT AND THURSDAY...MOSTLY CLEAR. LOWS IN THE UPPER
60S. HIGHS IN THE MID 80S.

Zone Forecast

.TODAY...PARTLY SUNNY. AREAS OF FOG EARLY IN THE MORNING. HIGHS
IN THE UPPER 80S. NORTH WINDS 5 TO 10 MPH.
.TONIGHT...CLEAR. AREAS OF FOG AFTER MIDNIGHT. LOWS IN THE MID
60S. LIGHT AND VARIABLE WINDS.
.SATURDAY...MOSTLY SUNNY. AREAS OF FOG EARLY IN THE MORNING.
HIGHS IN THE UPPER 80S. LIGHT AND VARIABLE WINDS.
.SATURDAY NIGHT...MOSTLY CLEAR. LOWS IN THE UPPER 60S. LIGHT AND
VARIABLE WINDS.
.SUNDAY...PARTLY CLOUDY. A 20 PERCENT CHANCE OF SHOWERS AND
THUNDERSTORMS IN THE AFTERNOON. HIGHS IN THE UPPER 80S. HIGHEST
HEAT INDEX READINGS 95 TO 100 IN THE AFTERNOON. SOUTHWEST WINDS
AROUND 10 MPH.
.SUNDAY NIGHT...PARTLY CLOUDY WITH A 20 PERCENT CHANCE OF SHOWERS
AND THUNDERSTORMS. LOWS IN THE LOWER 70S.
.MONDAY...PARTLY CLOUDY WITH A 20 PERCENT CHANCE OF SHOWERS AND
THUNDERSTORMS. HIGHS AROUND 90.
.MONDAY NIGHT...PARTLY CLOUDY WITH A 20 PERCENT CHANCE OF SHOWERS
AND THUNDERSTORMS. LOWS IN THE LOWER 70S.
.TUESDAY AND TUESDAY NIGHT...PARTLY CLOUDY WITH A 30 PERCENT
CHANCE OF SHOWERS AND THUNDERSTORMS. HIGHS IN THE UPPER 80S. LOWS
IN THE LOWER 70S.
.WEDNESDAY...PARTLY CLOUDY WITH A 20 PERCENT CHANCE OF SHOWERS
AND THUNDERSTORMS. HIGHS IN THE MID 80S.
.WEDNESDAY NIGHT AND THURSDAY...MOSTLY CLEAR. LOWS IN THE UPPER
60S. HIGHS IN THE MID 80S.

Zone Forecast

.TODAY...PARTLY SUNNY. AREAS OF FOG EARLY IN THE MORNING. HIGHS
IN THE UPPER 80S. NORTH WINDS 5 TO 10 MPH.
.TONIGHT...CLEAR. AREAS OF FOG AFTER MIDNIGHT. LOWS IN THE MID
60S. LIGHT AND VARIABLE WINDS.
.SATURDAY...MOSTLY SUNNY. AREAS OF FOG EARLY IN THE MORNING.
HIGHS IN THE UPPER 80S. LIGHT AND VARIABLE WINDS.
.SATURDAY NIGHT...MOSTLY CLEAR. LOWS IN THE UPPER 60S. LIGHT AND
VARIABLE WINDS.
.SUNDAY...PARTLY CLOUDY. A 20 PERCENT CHANCE OF SHOWERS AND
THUNDERSTORMS IN THE AFTERNOON. HIGHS IN THE UPPER 80S. HIGHEST
HEAT INDEX READINGS 95 TO 100 IN THE AFTERNOON. SOUTHWEST WINDS
AROUND 10 MPH.
.SUNDAY NIGHT...PARTLY CLOUDY WITH A 20 PERCENT CHANCE OF SHOWERS
AND THUNDERSTORMS. LOWS IN THE LOWER 70S.
.MONDAY...PARTLY CLOUDY WITH A 20 PERCENT CHANCE OF SHOWERS AND
THUNDERSTORMS. HIGHS AROUND 90.
.MONDAY NIGHT...PARTLY CLOUDY WITH A 20 PERCENT CHANCE OF SHOWERS
AND THUNDERSTORMS. LOWS IN THE LOWER 70S.
.TUESDAY AND TUESDAY NIGHT...PARTLY CLOUDY WITH A 30 PERCENT
CHANCE OF SHOWERS AND THUNDERSTORMS. HIGHS IN THE UPPER 80S. LOWS
IN THE LOWER 70S.
.WEDNESDAY...PARTLY CLOUDY WITH A 20 PERCENT CHANCE OF SHOWERS
AND THUNDERSTORMS. HIGHS IN THE MID 80S.
.WEDNESDAY NIGHT AND THURSDAY...MOSTLY CLEAR. LOWS IN THE UPPER
60S. HIGHS IN THE MID 80S.

Hazardous Weather Outlook

THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTH CENTRAL ILLINOIS...
NORTHEAST ILLINOIS AND NORTHWEST INDIANA.

.DAY ONE...TODAY AND TONIGHT.

WEATHER HAZARDS EXPECTED:

THUNDERSTORMS...THE STRONGEST MAY PRODUCE:

DAMAGING WINDS IN EXCESS OF 60 MPH.
TORRENTIAL RAINFALL...WHICH MAY CAUSE LOCALIZED FLOODING.

AREAS AFFECTED AND TIMING:

SCATTERED THUNDERSTORMS ARE POSSIBLE SOUTH OF A LINE FROM
CHICAGO TO MENDOTA THIS MORNING...AND THEN SOUTH OF A LINE FROM
HEBRON INDIANA TO STREATOR ILLINOIS THIS AFTERNOON.

DISCUSSION:

A WEAK COLD FRONT WILL SLOWLY MOVE SOUTH ACROSS THE AREA TODAY.
SCATTERED THUNDERSTORMS WILL BE POSSIBLE ALONG AND AHEAD OF THIS
COLD FRONT. THE STRONGEST STORMS WILL BE CAPABLE OF PRODUCING
DAMAGING WINDS GUSTS AND TORRENTIAL RAINFALL OF 1 TO 2 INCHES
PER HOUR WHICH MAY LEAD TO LOCALIZED FLOODING.

.DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY.

THUNDERSTORMS WILL BE POSSIBLE SUNDAY AFTERNOON THROUGH MONDAY
AFTERNOON...MAINLY NORTH OF INTERSTATE 80 AS ANOTHER WEAK COLD
FRONT SAGS INTO NORTHERN ILLINOIS.

THERE IS A CHANCE OF THUNDERSTORMS ACROSS THE ENTIRE AREA FROM
MONDAY NIGHT THROUGH THURSDAY.

HEAT INDICES MAY REACH 105 DEGREES MONDAY AND TUESDAY...MAINLY
SOUTH AND WEST OF A ROCKFORD TO FOWLER LINE.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION MAY BE NEEDED TODAY.

&&

COMPLETE FORECAST INFORMATION IS AVAILABLE ON THE NWS CHICAGO
WEBPAGE: WEATHER.GOV/CHICAGO

Zone Forecast

.TODAY...PARTLY SUNNY. AREAS OF FOG EARLY IN THE MORNING. HIGHS
IN THE UPPER 80S. LIGHT AND VARIABLE WINDS EARLY IN THE MORNING
BECOMING NORTH AROUND 10 MPH LATE IN THE MORNING.
.TONIGHT...CLEAR. AREAS OF FOG AFTER MIDNIGHT. LOWS IN THE MID
60S. LIGHT AND VARIABLE WINDS.
.SATURDAY...MOSTLY SUNNY. AREAS OF FOG EARLY IN THE MORNING.
HIGHS IN THE UPPER 80S. LIGHT AND VARIABLE WINDS.
.SATURDAY NIGHT...MOSTLY CLEAR. LOWS IN THE UPPER 60S. LIGHT AND
VARIABLE WINDS.
.SUNDAY...PARTLY CLOUDY. A 20 PERCENT CHANCE OF SHOWERS AND
THUNDERSTORMS IN THE AFTERNOON. HIGHS IN THE UPPER 80S. HIGHEST
HEAT INDEX READINGS 95 TO 100 IN THE AFTERNOON. SOUTHWEST WINDS
AROUND 10 MPH.
.SUNDAY NIGHT...PARTLY CLOUDY WITH A 20 PERCENT CHANCE OF SHOWERS
AND THUNDERSTORMS. LOWS IN THE LOWER 70S.
.MONDAY...PARTLY CLOUDY WITH A 20 PERCENT CHANCE OF SHOWERS AND
THUNDERSTORMS. HIGHS AROUND 90.
.MONDAY NIGHT...PARTLY CLOUDY WITH A 20 PERCENT CHANCE OF SHOWERS
AND THUNDERSTORMS. LOWS IN THE LOWER 70S.
.TUESDAY AND TUESDAY NIGHT...PARTLY CLOUDY WITH A 30 PERCENT
CHANCE OF SHOWERS AND THUNDERSTORMS. HIGHS IN THE UPPER 80S. LOWS
IN THE LOWER 70S.
.WEDNESDAY...PARTLY CLOUDY WITH A 20 PERCENT CHANCE OF SHOWERS
AND THUNDERSTORMS. HIGHS IN THE MID 80S.
.WEDNESDAY NIGHT AND THURSDAY...MOSTLY CLEAR. LOWS IN THE UPPER
60S. HIGHS IN THE MID 80S.

Short Term Weather

.NOW...
AT 1125 PM CDT...RADAR INDICATED WIDELY SCATTERED SHOWERS AND
THUNDERSTORMS DEVELOPING OVER PORTIONS OF NORTHERN ILLINOIS...
GENERALLY TO THE NORTH OF A MENDOTA TO DOWNTOWN CHICAGO LINE.
THESE INDIVIDUAL STORMS WERE MOVING TO THE EAST AT AROUND 35 MPH.
THROUGH 1230 AM CDT...THE STRONGEST STORMS WILL LIKELY AFFECT
PORTIONS OF NORTHERN OGLE COUNTY INTO SOUTHERN BOONE AND SOUTHWEST
MCHENRY COUNTIES...WHILE OTHER STORMS WILL AFFECT MAINLY CENTRAL
PORTIONS OF THE CHICAGO METRO AREA FROM SOUTHERN AND CENTRAL KANE
COUNTY INTO CENTRAL COOK COUNTY. BRIEF DOWNPOURS OF A HALF AN INCH
TO THREE QUARTERS OF AN INCH OF RAINFALL...OCCASIONAL CLOUD TO
GROUND LIGHTNING...AND WIND GUSTS TO AROUND 40 MPH WILL BE
POSSIBLE WITH THE STRONGER STORMS. A FLASH FLOOD WATCH REMAINS IN
EFFECT FOR THE AREA THROUGH 7 AM CDT. LOCALLY HEAVY RAINFALL OF AN
INCH OR MORE MAY BE POSSIBLE IF SEVERAL STORMS TRACK ACROSS THE
SAME LOCATIONS.

Short Term Weather

.NOW...
WIDELY SCATTERED THUNDERSTORMS DEVELOPING ACROSS NORTHEASTERN
ILLINOIS THIS EVENING WILL IMPACT PORTIONS OF THE CHICAGO
METROPOLITAN AREA THROUGH 1130 PM. BRIEF PERIODS OF HEAVY RAINFALL
AND GUSTY WINDS TO 40 MPH WILL LIKELY ACCOMPANY THESE STORMS.
ADDITIONAL THUNDERSTORMS MAY DEVELOP AFTER MIDNIGHT AS A COLD
FRONT APPROACHES THE AREA FROM THE WEST. THESE STORMS MAY ALSO
PRODUCE GUSTY WINDS AND VERY HEAVY RAINFALL.

Short Term Weather

.NOW...
AT 937 PM DOPPLER RADAR INDICATED A THUNDERSTORM OVER SUNNYSIDE...
MOVING EAST AT 35 MPH.

LOCATIONS THAT MAY BE AFFECTED INCLUDE...
FOX LAKE...FOX LAKE HILLS...LAKE VILLA...LAKE CATHERINE...ANTIOCH...
LINDENHURST...OLD MILL CREEK AND GRANDWOOD PARK.

GUSTY WINDS TO 40 MPH AND TORRENTIAL DOWNPOURS MAY ACCOMPANY THIS
THUNDERSTORM.

Zone Forecast

...FLASH FLOOD WATCH IN EFFECT UNTIL 7 AM CDT FRIDAY...

.REST OF TONIGHT...MOSTLY CLOUDY. CHANCE OF SHOWERS AND
THUNDERSTORMS LATE IN THE EVENING...THEN SHOWERS AND
THUNDERSTORMS LIKELY. CHANCE OF SHOWERS AND THUNDERSTORMS DURING
THE PREDAWN HOURS. LOWS IN THE LOWER 70S. LIGHT AND VARIABLE
WINDS. CHANCE OF PRECIPITATION 60 PERCENT.
.FRIDAY...PARTLY SUNNY IN THE MORNING THEN BECOMING MOSTLY SUNNY.
A 20 PERCENT CHANCE OF SHOWERS AND THUNDERSTORMS. HIGHS IN THE
UPPER 80S. LIGHT AND VARIABLE WINDS UNTIL LATE AFTERNOON BECOMING
NORTH AROUND 10 MPH LATE IN THE AFTERNOON.
.FRIDAY NIGHT...CLEAR. LOWS IN THE MID 60S. LIGHT AND VARIABLE
WINDS.
.SATURDAY...MOSTLY SUNNY. HIGHS IN THE UPPER 80S. LIGHT AND
VARIABLE WINDS.
.SATURDAY NIGHT...MOSTLY CLEAR. LOWS IN THE UPPER 60S. LIGHT AND
VARIABLE WINDS.
.SUNDAY...PARTLY CLOUDY WITH A 20 PERCENT CHANCE OF SHOWERS AND
THUNDERSTORMS. HIGHS IN THE UPPER 80S.
.SUNDAY NIGHT...MOSTLY CLEAR WITH A 20 PERCENT CHANCE OF SHOWERS
AND THUNDERSTORMS. LOWS IN THE LOWER 70S.
.MONDAY...MOSTLY SUNNY. HIGHS IN THE UPPER 80S.
.MONDAY NIGHT...MOSTLY CLEAR. LOWS IN THE UPPER 60S.
.TUESDAY...PARTLY CLOUDY WITH A 20 PERCENT CHANCE OF SHOWERS AND
THUNDERSTORMS. HIGHS IN THE UPPER 80S.
.TUESDAY NIGHT...PARTLY CLOUDY WITH A 40 PERCENT CHANCE OF
SHOWERS AND THUNDERSTORMS. LOWS IN THE LOWER 70S.
.WEDNESDAY AND WEDNESDAY NIGHT...PARTLY CLOUDY WITH A 20 PERCENT
CHANCE OF SHOWERS AND THUNDERSTORMS. HIGHS IN THE MID 80S. LOWS
IN THE MID 60S.
.THURSDAY...PARTLY CLOUDY WITH A 30 PERCENT CHANCE OF SHOWERS AND
THUNDERSTORMS. HIGHS IN THE LOWER 80S.

Hazardous Weather Outlook

THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTH CENTRAL ILLINOIS...
NORTHEAST ILLINOIS AND NORTHWEST INDIANA.

.DAY ONE...TONIGHT.

WEATHER HAZARDS EXPECTED:

HEAT INDICES OVER 100 DEGREES.

THUNDERSTORMS...SOME OF MAY PRODUCE:

DAMAGING WINDS IN EXCESS OF 60 MPH.
QUARTER SIZED HAIL.
VERY HEAVY RAINFALL LEADING TO LOCALIZED FLASH FLOODING.

AREAS AFFECTED AND TIMING:

HEAT INDICES AT OR ABOVE 105 DEGREES ARE LIKELY INTO EARLY THIS
EVENING...ESPECIALLY SOUTH OF INTERSTATE 80.

ISOLATED TO SCATTERED THUNDERSTORMS MAY DEVELOP ACROSS PORTIONS
OF NORTHERN ILLINOIS BY LATE AFTERNOON. ADDITIONAL
THUNDERSTORMS DEVELOPING OVER PORTIONS OF IOWA AND SOUTHEAST
MINNESOTA MAY MOVE EAST INTO NORTHERN ILLINOIS AND NORTHWEST
INDIANA DURING THE LATE EVENING AND OVERNIGHT HOURS.

DISCUSSION:

A NEARLY STATIONARY FRONTAL BOUNDARY...REINFORCED BY COOLER
OUTFLOW FROM OVERNIGHT AND EARLY MORNING STORMS...STRETCHES
FROM NEAR THE QUAD CITIES TO NEAR KANKAKEE TO NORTH OF
RENSSELAER INDIANA LATE THIS AFTERNOON. VERY WARM...HUMID AND
UNSTABLE AIR RESIDES ALONG AND SOUTH OF THIS FRONT. ISOLATED TO
SCATTERED THUNDERSTORMS MAY DEVELOP ALONG THIS FRONT DURING THE
LATE AFTERNOON HOURS...AND MAY PERSIST INTO THE EVENING. STRONG
INSTABILITY AND THEIR POSITION ALONG THE SOUTHERN PERIPHERY OF
FASTER MID LEVEL FLOW ALOFT SUGGEST THESE STORMS MAY PRESENT A
THREAT OF ISOLATED SEVERE WEATHER...WITH DAMAGING WINDS AND
LOCALLY HEAVY RAINFALL THE PRIMARY THREATS.

THUNDERSTORMS WERE ALSO DEVELOPING ACROSS PORTIONS OF IOWA INTO
SOUTHEAST MINNESOTA AND WESTERN WISCONSIN THIS AFTERNOON...IN
ASSOCIATION WITH A MID LEVEL DISTURBANCE MOVING ACROSS THE AREA
WEST OF THE MISSISSIPPI RIVER. THIS DISTURBANCE WILL TRACK EAST
ACROSS WISCONSIN AND NORTHERN ILLINOIS LATER TONIGHT...AND WILL
LIKELY RESULT IN AN INCREASE IN THUNDERSTORM COVERAGE LATER
THIS EVENING AND OVERNIGHT. THESE STORMS WILL ALSO PRESENT THE
POTENTIAL FOR DAMAGING WINDS AND SOME HAIL...BUT WILL ALSO
LIKELY BE HEAVY RAINFALL PRODUCERS. PORTIONS OF THE NORTHERN
ILLINOIS PORTION OF THE OUTLOOK AREA HAVE RECEIVED SEVERAL
BOUTS OF HEAVY RAIN OVER THE PAST SEVERAL DAYS...AND ADDITIONAL
HEAVY RAINFALL COULD CAUSE NEW OR ADDITIONAL FLASH FLOODING.

.DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY.

THUNDERSTORMS WILL AGAIN BE POSSIBLE FRIDAY...AND POSSIBLY WILL
LINGER INTO FRIDAY EVENING ACROSS PORTIONS OF THE OUTLOOK AREA
SOUTH OF INTERSTATE 80.

THERE IS A SLIGHT CHANCE OF THUNDERSTORMS AGAIN LATE SUNDAY...AND
PERIODS OF THUNDERSTORMS ARE POSSIBLE AGAIN TUESDAY INTO THURSDAY
OF NEXT WEEK.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION MAY BE NEEDED THIS EVENING AND OVERNIGHT.

&&

COMPLETE FORECAST INFORMATION IS AVAILABLE ON THE NWS CHICAGO
WEBPAGE: WEATHER.GOV/CHICAGO

Zone Forecast

...FLASH FLOOD WATCH IN EFFECT THROUGH FRIDAY MORNING...

.TONIGHT...MOSTLY CLOUDY. CHANCE OF SHOWERS AND THUNDERSTORMS
LATE IN THE AFTERNOON...THEN SHOWERS AND THUNDERSTORMS IN THE
EVENING AND OVERNIGHT. LOCALLY HEAVY RAINFALL POSSIBLE IN THE
EVENING. LOWS IN THE LOWER 70S. LIGHT AND VARIABLE WINDS. CHANCE
OF PRECIPITATION 80 PERCENT.
.FRIDAY...PARTLY SUNNY IN THE MORNING THEN BECOMING MOSTLY SUNNY.
A 20 PERCENT CHANCE OF SHOWERS AND THUNDERSTORMS. HIGHS IN THE
UPPER 80S. LIGHT AND VARIABLE WINDS UNTIL LATE AFTERNOON BECOMING
NORTH AROUND 10 MPH LATE IN THE AFTERNOON.
.FRIDAY NIGHT...CLEAR. LOWS IN THE MID 60S. LIGHT AND VARIABLE
WINDS.
.SATURDAY...MOSTLY SUNNY. HIGHS IN THE UPPER 80S. LIGHT AND
VARIABLE WINDS.
.SATURDAY NIGHT...MOSTLY CLEAR. LOWS IN THE UPPER 60S. LIGHT AND
VARIABLE WINDS.
.SUNDAY...PARTLY CLOUDY WITH A 20 PERCENT CHANCE OF SHOWERS AND
THUNDERSTORMS. HIGHS IN THE UPPER 80S.
.SUNDAY NIGHT...MOSTLY CLEAR WITH A 20 PERCENT CHANCE OF SHOWERS
AND THUNDERSTORMS. LOWS IN THE LOWER 70S.
.MONDAY AND MONDAY NIGHT...MOSTLY CLEAR. HIGHS IN THE UPPER 80S.
LOWS IN THE UPPER 60S.
.TUESDAY...PARTLY CLOUDY WITH A 20 PERCENT CHANCE OF SHOWERS AND
THUNDERSTORMS. HIGHS IN THE UPPER 80S.
.TUESDAY NIGHT...PARTLY CLOUDY WITH A 40 PERCENT CHANCE OF
SHOWERS AND THUNDERSTORMS. LOWS IN THE LOWER 70S.
.WEDNESDAY AND WEDNESDAY NIGHT...PARTLY CLOUDY WITH A 20 PERCENT
CHANCE OF SHOWERS AND THUNDERSTORMS. HIGHS IN THE MID 80S. LOWS
IN THE MID 60S.
.THURSDAY...PARTLY CLOUDY WITH A 30 PERCENT CHANCE OF SHOWERS AND
THUNDERSTORMS. HIGHS IN THE LOWER 80S.

Hazardous Weather Outlook

THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTH CENTRAL ILLINOIS...
NORTHEAST ILLINOIS AND NORTHWEST INDIANA.

.DAY ONE...THIS AFTERNOON 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 AT OR ABOVE 105 DEGREES ARE LIKELY THIS
AFTERNOON...ESPECIALLY SOUTH OF INTERSTATE 80.

SCATTERED THUNDERSTORMS WILL DIMINISH THROUGH MID DAY WITH
ADDITIONAL THUNDERSTORMS EXPECTED LATE THIS AFTERNOON INTO
TONIGHT.

DISCUSSION:

THUNDERSTORMS WILL CONTINUE TO DIMINISH THROUGH MID DAY WITH
PARTIAL CLEARING ALLOWING TEMPERATURES TO RISE INTO THE LOWER
90S. WITH VERY HIGH HUMIDITY IN PLACE...THIS WILL LEAD TO HEAT
INDICES OF AROUND 105 DEGREES FOR AREAS SOUTH OF INTERSTATE 80.

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

Zone Forecast

...FLASH FLOOD WATCH IN EFFECT THROUGH FRIDAY MORNING...

.REST OF TODAY...SHOWERS AND A CHANCE OF THUNDERSTORMS IN THE
MORNING...THEN SHOWERS AND THUNDERSTORMS LIKELY IN THE AFTERNOON.
HIGHS IN THE UPPER 80S. PEAK AFTERNOON HEAT INDEX READINGS 95 TO
100. LIGHT AND VARIABLE WINDS. CHANCE OF PRECIPITATION
90 PERCENT.
.TONIGHT...SHOWERS AND THUNDERSTORMS LIKELY. LOWS IN THE LOWER
70S. LIGHT AND VARIABLE WINDS. CHANCE OF PRECIPITATION
60 PERCENT.
.FRIDAY...PARTLY SUNNY WITH A 20 PERCENT CHANCE OF SHOWERS AND
THUNDERSTORMS. HIGHS IN THE UPPER 80S. LIGHT AND VARIABLE WINDS.
.FRIDAY NIGHT...MOSTLY CLEAR. LOWS IN THE UPPER 60S. LIGHT AND
VARIABLE WINDS.
.SATURDAY...MOSTLY SUNNY. HIGHS IN THE UPPER 80S. LIGHT AND
VARIABLE WINDS.
.SATURDAY NIGHT...MOSTLY CLEAR. LOWS IN THE UPPER 60S.
.SUNDAY...MOSTLY SUNNY. HIGHS IN THE UPPER 80S.
.SUNDAY NIGHT...MOSTLY CLEAR WITH A 20 PERCENT CHANCE OF SHOWERS
AND THUNDERSTORMS. LOWS IN THE LOWER 70S.
.MONDAY AND MONDAY NIGHT...MOSTLY CLEAR. HIGHS IN THE UPPER 80S.
LOWS IN THE UPPER 60S.
.TUESDAY...PARTLY CLOUDY WITH A 30 PERCENT CHANCE OF SHOWERS AND
THUNDERSTORMS. HIGHS IN THE UPPER 80S.
.TUESDAY NIGHT...PARTLY CLOUDY WITH A 50 PERCENT CHANCE OF
SHOWERS AND THUNDERSTORMS. LOWS IN THE LOWER 70S.
.WEDNESDAY...PARTLY SUNNY WITH A 30 PERCENT CHANCE OF SHOWERS AND
THUNDERSTORMS. HIGHS IN THE MID 80S.

Hazardous Weather Outlook

THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTH CENTRAL ILLINOIS...
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

Zone Forecast

...FLASH FLOOD WATCH IN EFFECT UNTIL 1 PM CDT THIS AFTERNOON...

.REST OF TONIGHT...SHOWERS AND THUNDERSTORMS. SOME THUNDERSTORMS
MAY PRODUCE HEAVY RAINFALL. TEMPERATURES NEARLY STEADY IN THE MID
70S. SOUTH WINDS AROUND 10 MPH BECOMING SOUTHWEST DURING THE
PREDAWN HOURS. CHANCE OF PRECIPITATION 90 PERCENT.
.THURSDAY...SHOWERS AND THUNDERSTORMS LIKELY. HIGHS IN THE MID
80S. SOUTHWEST WINDS AROUND 10 MPH IN THE MORNING BECOMING LIGHT
AND VARIABLE IN THE AFTERNOON. CHANCE OF PRECIPITATION
60 PERCENT.
.THURSDAY NIGHT...MOSTLY CLOUDY WITH A 50 PERCENT CHANCE OF
SHOWERS AND THUNDERSTORMS. LOWS IN THE LOWER 70S. LIGHT AND
VARIABLE WINDS.
.FRIDAY...PARTLY SUNNY WITH A 30 PERCENT CHANCE OF SHOWERS AND
THUNDERSTORMS. HIGHS IN THE UPPER 80S. LIGHT AND VARIABLE WINDS
IN THE MORNING BECOMING NORTHEAST AROUND 10 MPH IN THE AFTERNOON.
.FRIDAY NIGHT...MOSTLY CLEAR. LOWS IN THE UPPER 60S. LIGHT AND
VARIABLE WINDS.
.SATURDAY...MOSTLY SUNNY. HIGHS IN THE UPPER 80S.
.SATURDAY NIGHT...MOSTLY CLEAR. LOWS AROUND 70.
.SUNDAY...MOSTLY SUNNY. HIGHS IN THE UPPER 80S.
.SUNDAY NIGHT...MOSTLY CLEAR WITH A 30 PERCENT CHANCE OF SHOWERS
AND THUNDERSTORMS. LOWS AROUND 70.
.MONDAY AND MONDAY NIGHT...MOSTLY CLEAR. HIGHS IN THE UPPER 80S.
LOWS IN THE UPPER 60S.
.TUESDAY...PARTLY CLOUDY WITH A 30 PERCENT CHANCE OF SHOWERS AND
THUNDERSTORMS. HIGHS IN THE UPPER 80S.
.TUESDAY NIGHT...PARTLY CLOUDY WITH A 50 PERCENT CHANCE OF
SHOWERS AND THUNDERSTORMS. LOWS IN THE UPPER 60S.
.WEDNESDAY...MOSTLY SUNNY WITH A 20 PERCENT CHANCE OF SHOWERS AND
THUNDERSTORMS. HIGHS IN THE MID 80S.

Zone Forecast

...FLASH FLOOD WATCH IN EFFECT THROUGH THURSDAY AFTERNOON...

.OVERNIGHT...SHOWERS AND THUNDERSTORMS. SOME THUNDERSTORMS MAY
PRODUCE HEAVY RAINFALL. TEMPERATURES NEARLY STEADY IN THE MID
70S. SOUTH WINDS AROUND 10 MPH BECOMING SOUTHWEST DURING THE
PREDAWN HOURS. CHANCE OF PRECIPITATION 90 PERCENT.
.THURSDAY...SHOWERS AND THUNDERSTORMS LIKELY. HIGHS IN THE MID
80S. SOUTHWEST WINDS AROUND 10 MPH IN THE MORNING BECOMING LIGHT
AND VARIABLE IN THE AFTERNOON. CHANCE OF PRECIPITATION
60 PERCENT.
.THURSDAY NIGHT...MOSTLY CLOUDY WITH A 50 PERCENT CHANCE OF
SHOWERS AND THUNDERSTORMS. LOWS IN THE LOWER 70S. LIGHT AND
VARIABLE WINDS.
.FRIDAY...PARTLY SUNNY WITH A 30 PERCENT CHANCE OF SHOWERS AND
THUNDERSTORMS. HIGHS IN THE UPPER 80S. LIGHT AND VARIABLE WINDS
IN THE MORNING BECOMING NORTHEAST AROUND 10 MPH IN THE AFTERNOON.
.FRIDAY NIGHT...MOSTLY CLEAR. LOWS IN THE UPPER 60S. LIGHT AND
VARIABLE WINDS.
.SATURDAY...MOSTLY SUNNY. HIGHS IN THE UPPER 80S.
.SATURDAY NIGHT...MOSTLY CLEAR. LOWS AROUND 70.
.SUNDAY...MOSTLY SUNNY. HIGHS IN THE UPPER 80S.
.SUNDAY NIGHT...MOSTLY CLEAR WITH A 30 PERCENT CHANCE OF SHOWERS
AND THUNDERSTORMS. LOWS AROUND 70.
.MONDAY AND MONDAY NIGHT...MOSTLY CLEAR. HIGHS IN THE UPPER 80S.
LOWS IN THE UPPER 60S.
.TUESDAY...PARTLY CLOUDY WITH A 30 PERCENT CHANCE OF SHOWERS AND
THUNDERSTORMS. HIGHS IN THE UPPER 80S.
.TUESDAY NIGHT...PARTLY CLOUDY WITH A 50 PERCENT CHANCE OF
SHOWERS AND THUNDERSTORMS. LOWS IN THE UPPER 60S.
.WEDNESDAY...MOSTLY SUNNY WITH A 20 PERCENT CHANCE OF SHOWERS AND
THUNDERSTORMS. HIGHS IN THE MID 80S.

Zone Forecast

...FLASH FLOOD WATCH IN EFFECT THROUGH THURSDAY AFTERNOON...
...TORNADO WATCH 694 IN EFFECT UNTIL 1 AM CDT THURSDAY...

.REST OF TONIGHT...CHANCE OF SHOWERS AND THUNDERSTORMS EARLY IN
THE EVENING...THEN SHOWERS AND THUNDERSTORMS IN THE LATE EVENING
AND OVERNIGHT. SOME THUNDERSTORMS MAY PRODUCE HEAVY RAINFALL.
LOWS IN THE MID 70S. SOUTH WINDS AROUND 10 MPH UNTIL EARLY
MORNING BECOMING SOUTHWEST DURING THE PREDAWN HOURS. CHANCE OF
PRECIPITATION 90 PERCENT.
.THURSDAY...SHOWERS AND THUNDERSTORMS LIKELY. HIGHS IN THE MID
80S. SOUTHWEST WINDS AROUND 10 MPH IN THE MORNING BECOMING LIGHT
AND VARIABLE IN THE AFTERNOON. CHANCE OF PRECIPITATION
60 PERCENT.
.THURSDAY NIGHT...MOSTLY CLOUDY WITH A 50 PERCENT CHANCE OF
SHOWERS AND THUNDERSTORMS. LOWS IN THE LOWER 70S. LIGHT AND
VARIABLE WINDS.
.FRIDAY...PARTLY SUNNY WITH A 30 PERCENT CHANCE OF SHOWERS AND
THUNDERSTORMS. HIGHS IN THE UPPER 80S. LIGHT AND VARIABLE WINDS
IN THE MORNING BECOMING NORTHEAST AROUND 10 MPH IN THE AFTERNOON.
.FRIDAY NIGHT...MOSTLY CLEAR. LOWS IN THE UPPER 60S. LIGHT AND
VARIABLE WINDS.
.SATURDAY...MOSTLY SUNNY. HIGHS IN THE UPPER 80S.
.SATURDAY NIGHT...MOSTLY CLEAR. LOWS AROUND 70.
.SUNDAY...MOSTLY SUNNY. HIGHS IN THE UPPER 80S.
.SUNDAY NIGHT...MOSTLY CLEAR WITH A 30 PERCENT CHANCE OF SHOWERS
AND THUNDERSTORMS. LOWS AROUND 70.
.MONDAY AND MONDAY NIGHT...MOSTLY CLEAR. HIGHS IN THE UPPER 80S.
LOWS IN THE UPPER 60S.
.TUESDAY...PARTLY CLOUDY WITH A 30 PERCENT CHANCE OF SHOWERS AND
THUNDERSTORMS. HIGHS IN THE UPPER 80S.
.TUESDAY NIGHT...PARTLY CLOUDY WITH A 50 PERCENT CHANCE OF
SHOWERS AND THUNDERSTORMS. LOWS IN THE UPPER 60S.
.WEDNESDAY...MOSTLY SUNNY WITH A 20 PERCENT CHANCE OF SHOWERS AND
THUNDERSTORMS. HIGHS IN THE MID 80S.

Zone Forecast

...FLASH FLOOD WATCH IN EFFECT THROUGH THURSDAY AFTERNOON...

.REST OF TONIGHT...SHOWERS AND THUNDERSTORMS. SOME THUNDERSTORMS
MAY PRODUCE HEAVY RAINFALL. LOWS IN THE MID 70S. SOUTHWEST WINDS
AROUND 10 MPH. CHANCE OF PRECIPITATION 90 PERCENT.
.THURSDAY...SHOWERS AND THUNDERSTORMS LIKELY. HIGHS IN THE MID
80S. SOUTHWEST WINDS AROUND 10 MPH IN THE MORNING BECOMING LIGHT
AND VARIABLE IN THE AFTERNOON. CHANCE OF PRECIPITATION
60 PERCENT.
.THURSDAY NIGHT...MOSTLY CLOUDY WITH A 50 PERCENT CHANCE OF
SHOWERS AND THUNDERSTORMS. LOWS IN THE LOWER 70S. LIGHT AND
VARIABLE WINDS.
.FRIDAY...PARTLY SUNNY WITH A 30 PERCENT CHANCE OF SHOWERS AND
THUNDERSTORMS. HIGHS IN THE UPPER 80S. LIGHT AND VARIABLE WINDS
IN THE MORNING BECOMING NORTHEAST AROUND 10 MPH IN THE AFTERNOON.
.FRIDAY NIGHT...MOSTLY CLEAR. LOWS IN THE UPPER 60S. LIGHT AND
VARIABLE WINDS.
.SATURDAY...MOSTLY SUNNY. HIGHS IN THE UPPER 80S.
.SATURDAY NIGHT...MOSTLY CLEAR. LOWS AROUND 70.
.SUNDAY...MOSTLY SUNNY. HIGHS IN THE UPPER 80S.
.SUNDAY NIGHT...MOSTLY CLEAR WITH A 30 PERCENT CHANCE OF SHOWERS
AND THUNDERSTORMS. LOWS AROUND 70.
.MONDAY AND MONDAY NIGHT...MOSTLY CLEAR. HIGHS IN THE UPPER 80S.
LOWS IN THE UPPER 60S.
.TUESDAY...PARTLY CLOUDY WITH A 30 PERCENT CHANCE OF SHOWERS AND
THUNDERSTORMS. HIGHS IN THE UPPER 80S.
.TUESDAY NIGHT...PARTLY CLOUDY WITH A 50 PERCENT CHANCE OF
SHOWERS AND THUNDERSTORMS. LOWS IN THE UPPER 60S.
.WEDNESDAY...MOSTLY SUNNY WITH A 20 PERCENT CHANCE OF SHOWERS AND
THUNDERSTORMS. HIGHS IN THE MID 80S.

Hazardous Weather Outlook

THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTH CENTRAL ILLINOIS...
NORTHEAST ILLINOIS AND NORTHWEST INDIANA.

.DAY ONE...TONIGHT.

WEATHER HAZARDS EXPECTED:

THUNDERSTORMS...SOME MAY PRODUCE:

WIND GUSTS UP TO 60 MPH.
HEAVY RAINFALL.
ISOLATED TORNADOES.
FREQUENT LIGHTNING.

AREAS AFFECTED AND TIMING:

ISOLATED THUNDERSTORMS MAY DEVELOP ALONG A LINE FROM ROCKFORD
EASTWARD ACROSS THE NORTHERN CHICAGO METRO LATE THIS AFTERNOON.
MORE WIDESPREAD THUNDERSTORMS ARE EXPECTED TO DEVELOP ACROSS
EASTERN IOWA OR NORTHWEST ILLINOIS LATE THIS AFTERNOON AND EARLY
THIS EVENING THEN MOVE EASTWARD INTO NORTH CENTRAL AND NORTHEAST
ILLINOIS...PRIMARILY ALONG AND NORTH OF INTERSTATE 88 AND
INTERSTATE 290. AREAS SOUTH OF THESE HIGHWAYS HAVE A CHANCE FOR
THUNDERSTORMS AS WELL. THUNDERSTORMS WILL LIKELY CONTINUE
THROUGH THE NIGHT ALONG AND NORTH OF INTERSTATE 80.

DISCUSSION:

A WARM FRONTAL BOUNDARY LIFTING NORTHWARD ACROSS NORTHERN
ILLINOIS WILL BE THE FOCUS FOR THUNDERSTORM DEVELOPMENT LATE
THIS AFTERNOON THROUGH TONIGHT. IT APPEARS THAT THUNDERSTORMS
WILL BEGIN TO DEVELOP ACROSS EASTERN IOWA NORTHWEST ILLINOIS
LATE THIS AFTERNOON WITH SOME ISOLATED DEVELOPMENT POSSIBLE
ACROSS NORTH CENTRAL AND NORTHEAST ILLINOIS. THUNDERSTORM
ACTIVITY IS THEN EXPECTED TO MOVE EASTWARD AND BECOME MORE
WIDESPREAD THROUGH THE EVENING AND CONTINUE OVERNIGHT. WITH A
VERY MOIST AIR MASS IN PLACE EXTREMELY HEAVY DOWNPOURS ARE LIKELY
UNDER THE STRONGEST STORMS WITH RAINFALL RATES OF 1 TO 3 INCHES
PER HOUR POSSIBLE. PLACEMENT OF THE FRONT WILL BE KEY IN
IDENTIFYING THE AREA WHERE THE HEAVIEST RAIN WILL FALL. AT THIS
TIME...THERE IS POTENTIAL FOR HEAVY RAIN AND FLASH FLOODING
ALONG AND NORTH OF INTERSTATE 80 INTO FRIDAY MORNING. THE
GREATEST THREAT FOR FLASH FLOODING WILL BE ALONG AND NORTH OF
INTERSTATE 88 AND INTERSTATE 290. IN ADDITION...STREAMS AT OR
NEAR BANKFULL MAY BECOME FURTHER SWOLLEN AS A RESULT OF ANY
HEAVY RAINFALL.

HIGH HEAT AND HUMIDITY WILL BE A CONCERN ACROSS AREAS FROM
PONTIAC TO KANKAKEE TO RENSSELAER WITH HEAT INDEX VALUES BETWEEN
100 AND 110 DEGREES UNTIL EARLY EVENING.

.DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY.

THERE IS A CHANCE FOR THUNDERSTORMS THURSDAY THROUGH FRIDAY.
THUNDERSTORMS MAY PRODUCE VERY HEAVY RAINFALL... ESPECIALLY FOR
LOCATIONS NORTH OF THE INTERSTATE 80 CORRIDOR.

HEAT AND HUMIDITY RETURNS TO NORTHERN ILLINOIS AND NORTHWEST
INDIANA THURSDAY...MAINLY SOUTH OF INTERSTATE 80 WHERE HEAT
INDICES WILL RANGE FROM 100 TO 110 DEGREES.

.SPOTTER INFORMATION STATEMENT...

SPOTTERS MAY BE NEEDED THIS EVENING AND TONIGHT.

&&

COMPLETE FORECAST INFORMATION IS AVAILABLE ON THE NWS CHICAGO
WEBPAGE: WEATHER.GOV/CHICAGO

Zone Forecast

...FLASH FLOOD WATCH IN EFFECT THROUGH THURSDAY AFTERNOON...

.TONIGHT...SHOWERS AND THUNDERSTORMS LIKELY EARLY IN THE
EVENING...THEN SHOWERS AND THUNDERSTORMS IN THE LATE EVENING AND
OVERNIGHT. SOME THUNDERSTORMS MAY PRODUCE HEAVY RAINFALL IN THE
LATE EVENING AND OVERNIGHT. LOWS IN THE MID 70S. SOUTHWEST WINDS
AROUND 10 MPH. CHANCE OF PRECIPITATION 90 PERCENT.
.THURSDAY...SHOWERS AND THUNDERSTORMS LIKELY. HIGHS IN THE MID
80S. SOUTHWEST WINDS AROUND 10 MPH IN THE MORNING BECOMING LIGHT
AND VARIABLE IN THE AFTERNOON. CHANCE OF PRECIPITATION
60 PERCENT.
.THURSDAY NIGHT...MOSTLY CLOUDY WITH A 50 PERCENT CHANCE OF
SHOWERS AND THUNDERSTORMS. LOWS IN THE LOWER 70S. LIGHT AND
VARIABLE WINDS.
.FRIDAY...PARTLY SUNNY WITH A 30 PERCENT CHANCE OF SHOWERS AND
THUNDERSTORMS. HIGHS IN THE UPPER 80S. LIGHT AND VARIABLE WINDS
IN THE MORNING BECOMING NORTHEAST AROUND 10 MPH IN THE AFTERNOON.
.FRIDAY NIGHT...MOSTLY CLEAR. LOWS IN THE UPPER 60S. LIGHT AND
VARIABLE WINDS.
.SATURDAY...MOSTLY SUNNY. HIGHS IN THE UPPER 80S.
.SATURDAY NIGHT...MOSTLY CLEAR. LOWS AROUND 70.
.SUNDAY...MOSTLY SUNNY. HIGHS IN THE UPPER 80S.
.SUNDAY NIGHT...MOSTLY CLEAR WITH A 30 PERCENT CHANCE OF SHOWERS
AND THUNDERSTORMS. LOWS AROUND 70.
.MONDAY AND MONDAY NIGHT...MOSTLY CLEAR. HIGHS IN THE UPPER 80S.
LOWS IN THE UPPER 60S.
.TUESDAY...PARTLY CLOUDY WITH A 30 PERCENT CHANCE OF SHOWERS AND
THUNDERSTORMS. HIGHS IN THE UPPER 80S.
.TUESDAY NIGHT...PARTLY CLOUDY WITH A 50 PERCENT CHANCE OF
SHOWERS AND THUNDERSTORMS. LOWS IN THE UPPER 60S.
.WEDNESDAY...MOSTLY SUNNY WITH A 20 PERCENT CHANCE OF SHOWERS AND
THUNDERSTORMS. HIGHS IN THE MID 80S.

Zone Forecast

...FLASH FLOOD WATCH IN EFFECT THROUGH THURSDAY AFTERNOON...

.THIS AFTERNOON...PARTLY SUNNY WITH A 50 PERCENT CHANCE OF
SHOWERS AND THUNDERSTORMS. HIGHS IN THE MID 80S. SOUTH WINDS
10 TO 15 MPH.
.TONIGHT...SHOWERS AND THUNDERSTORMS LIKELY. LOWS IN THE MID 70S.
CHANCE OF PRECIPITATION 70 PERCENT.
.THURSDAY...SHOWERS AND THUNDERSTORMS LIKELY. HIGHS IN THE UPPER
80S. CHANCE OF PRECIPITATION 60 PERCENT.
.THURSDAY NIGHT...MOSTLY CLOUDY WITH A 40 PERCENT CHANCE OF
SHOWERS AND THUNDERSTORMS. LOWS IN THE LOWER 70S. LIGHT AND
VARIABLE WINDS.
.FRIDAY...PARTLY SUNNY WITH A 30 PERCENT CHANCE OF SHOWERS AND
THUNDERSTORMS. HIGHS IN THE UPPER 80S. LIGHT AND VARIABLE WINDS.
.FRIDAY NIGHT...PARTLY CLOUDY. LOWS IN THE UPPER 60S.
.SATURDAY...MOSTLY SUNNY. HIGHS IN THE MID 80S.
.SATURDAY NIGHT...MOSTLY CLEAR. LOWS IN THE LOWER 70S.
.SUNDAY...MOSTLY SUNNY. HIGHS IN THE UPPER 80S.
.SUNDAY NIGHT...PARTLY CLOUDY WITH A 30 PERCENT CHANCE OF SHOWERS
AND THUNDERSTORMS. LOWS IN THE LOWER 70S.
.MONDAY...MOSTLY SUNNY. HIGHS IN THE UPPER 80S.
.MONDAY NIGHT AND TUESDAY...PARTLY CLOUDY WITH A 20 PERCENT
CHANCE OF SHOWERS AND THUNDERSTORMS. LOWS IN THE LOWER 70S. HIGHS
IN THE UPPER 80S.

Zone Forecast

...FLASH FLOOD WATCH IN EFFECT FROM 4 PM CDT THIS AFTERNOON
THROUGH THURSDAY AFTERNOON...

.THIS AFTERNOON...PARTLY SUNNY WITH A 50 PERCENT CHANCE OF
SHOWERS AND THUNDERSTORMS. HIGHS IN THE MID 80S. SOUTH WINDS
10 TO 15 MPH.
.TONIGHT...SHOWERS AND THUNDERSTORMS LIKELY. LOWS IN THE MID 70S.
SOUTHWEST WINDS 10 TO 15 MPH. CHANCE OF PRECIPITATION 70 PERCENT.
.THURSDAY...SHOWERS AND THUNDERSTORMS LIKELY. HIGHS IN THE UPPER
80S. LIGHT AND VARIABLE WINDS EARLY IN THE MORNING BECOMING WEST
10 TO 15 MPH IN THE LATE MORNING AND AFTERNOON. CHANCE OF
PRECIPITATION 60 PERCENT.
.THURSDAY NIGHT...MOSTLY CLOUDY WITH A 40 PERCENT CHANCE OF
SHOWERS AND THUNDERSTORMS. LOWS IN THE LOWER 70S. LIGHT AND
VARIABLE WINDS.
.FRIDAY...PARTLY SUNNY WITH A 30 PERCENT CHANCE OF SHOWERS AND
THUNDERSTORMS. HIGHS IN THE UPPER 80S. LIGHT AND VARIABLE WINDS.
.FRIDAY NIGHT...PARTLY CLOUDY. LOWS IN THE UPPER 60S.
.SATURDAY...MOSTLY SUNNY. HIGHS IN THE MID 80S.
.SATURDAY NIGHT...MOSTLY CLEAR. LOWS IN THE LOWER 70S.
.SUNDAY...MOSTLY SUNNY. HIGHS IN THE UPPER 80S.
.SUNDAY NIGHT...PARTLY CLOUDY WITH A 30 PERCENT CHANCE OF SHOWERS
AND THUNDERSTORMS. LOWS IN THE LOWER 70S.
.MONDAY...MOSTLY SUNNY. HIGHS IN THE UPPER 80S.
.MONDAY NIGHT AND TUESDAY...PARTLY CLOUDY WITH A 20 PERCENT
CHANCE OF SHOWERS AND THUNDERSTORMS. LOWS IN THE LOWER 70S. HIGHS
IN THE UPPER 80S.

Hazardous Weather Outlook

THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTH CENTRAL ILLINOIS...
NORTHEAST ILLINOIS AND NORTHWEST INDIANA.

.DAY ONE...THIS AFTERNOON AND TONIGHT.

WEATHER HAZARDS EXPECTED:

THUNDERSTORMS...SOME MAY PRODUCE:

WIND GUSTS UP TO 60 MPH.
HEAVY RAINFALL.
FREQUENT LIGHTNING.

AREAS AFFECTED AND TIMING:

ISOLATED TO SCATTERED THUNDERSTORMS MAY CONTINUE TO
DEVELOP ON AND OFF ACROSS NORTHERN ILLINOIS THROUGH THE
AFTERNOON...MAINLY ALONG AND NORTH OF INTERSTATE 88 AND
INTERSTATE 290. MORE WIDESPREAD THUNDERSTORM DEVELOPMENT MAY
BEGIN AS EARLY AS LATE THIS AFTERNOON ACROSS NORTH CENTRAL
ILLINOIS AND SPREAD EASTWARD INTO NORTHEAST ILLINOIS EARLY THIS
EVENING...PRIMARILY ALONG AND NORTH OF INTERSTATE 88 AND
INTERSTATE 290. AREAS SOUTH OF THESE HIGHWAYS HAVE A CHANCE FOR
THUNDERSTORMS AS WELL. THUNDERSTORMS ARE EXPECTED TO CONTINUE
THROUGH THE NIGHT ALONG AND NORTH OF INTERSTATE 80.

DISCUSSION:

A STALLED OR SLOW MOVING FRONTAL BOUNDARY ACROSS NORTHERN
ILLINOIS WILL BE THE FOCUS FOR THUNDERSTORM DEVELOPMENT LATE
THIS AFTERNOON THROUGH TONIGHT. PLACEMENT OF THE FRONT WILL BE
KEY IN IDENTIFYING THE AREA WHERE THE HEAVIEST RAIN WILL FALL.
AT THIS TIME...THE GREATEST POTENTIAL FOR HEAVY RAIN AND FLASH
FLOODING WILL BE ALONG AND NORTH OF INTERSTATE 80 INTO FRIDAY
MORNING. IN ADDITION RENEWED CONCERNS FOR STREAMS AT OR NEAR
BANKFULL MAY BECOME FURTHER SWOLLEN IF THUNDERSTORMS ARE SLOW
MOVING.

HIGH HEAT AND HUMIDITY WILL BE A CONCERN ACROSS AREAS FROM
PONTIAC TO KANKAKEE TO RENSSELAER WITH HEAT INDEX VALUES BETWEEN
100 AND 110 DEGREES POSSIBLE THIS AFTERNOON.

.DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY.

THERE IS A CHANCE FOR THUNDERSTORMS THURSDAY THROUGH FRIDAY.
THUNDERSTORMS MAY PRODUCE VERY HEAVY RAINFALL... ESPECIALLY FOR
LOCATIONS NORTH OF THE INTERSTATE 80 CORRIDOR.

HEAT AND HUMIDITY RETURNS TO NORTHERN ILLINOIS AND NORTHWEST
INDIANA THURSDAY...MAINLY SOUTH OF INTERSTATE 80 WHERE HEAT
INDICES WILL RANGE FROM 100 TO 110 DEGREES.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION MAY BE NEEDED FROM LATE THIS AFTERNOON THROUGH TONIGHT.

&&

COMPLETE FORECAST INFORMATION IS AVAILABLE ON THE NWS CHICAGO
WEBPAGE: WEATHER.GOV/CHICAGO

Test Message

THIS IS THE WEEKLY TEST OF THE WXWARN1 ALERT SYSTEM THIS IS ONLY A TEST

Zone Forecast

.REST OF TODAY...MOSTLY CLOUDY. CHANCE OF SHOWERS AND
THUNDERSTORMS. SOME THUNDERSTORMS MAY PRODUCE HEAVY RAINFALL LATE
IN THE MORNING. HIGHS IN THE MID 80S. SOUTH WINDS 10 TO 15 MPH.
CHANCE OF PRECIPITATION 50 PERCENT.
.TONIGHT...SHOWERS AND THUNDERSTORMS LIKELY. LOWS IN THE MID 70S.
SOUTHWEST WINDS 10 TO 15 MPH. CHANCE OF PRECIPITATION 70 PERCENT.
.THURSDAY...SHOWERS AND THUNDERSTORMS LIKELY. HIGHS IN THE UPPER
80S. LIGHT AND VARIABLE WINDS EARLY IN THE MORNING BECOMING WEST
10 TO 15 MPH IN THE LATE MORNING AND AFTERNOON. CHANCE OF
PRECIPITATION 60 PERCENT.
.THURSDAY NIGHT...MOSTLY CLOUDY WITH A 40 PERCENT CHANCE OF
SHOWERS AND THUNDERSTORMS. LOWS IN THE LOWER 70S. LIGHT AND
VARIABLE WINDS.
.FRIDAY...PARTLY SUNNY WITH A 30 PERCENT CHANCE OF SHOWERS AND
THUNDERSTORMS. HIGHS IN THE UPPER 80S. LIGHT AND VARIABLE WINDS.
.FRIDAY NIGHT...PARTLY CLOUDY. LOWS IN THE UPPER 60S.
.SATURDAY...MOSTLY SUNNY. HIGHS IN THE MID 80S.
.SATURDAY NIGHT...MOSTLY CLEAR. LOWS IN THE LOWER 70S.
.SUNDAY...MOSTLY SUNNY. HIGHS IN THE UPPER 80S.
.SUNDAY NIGHT...PARTLY CLOUDY WITH A 30 PERCENT CHANCE OF SHOWERS
AND THUNDERSTORMS. LOWS IN THE LOWER 70S.
.MONDAY...MOSTLY SUNNY. HIGHS IN THE UPPER 80S.
.MONDAY NIGHT AND TUESDAY...PARTLY CLOUDY WITH A 20 PERCENT
CHANCE OF SHOWERS AND THUNDERSTORMS. LOWS IN THE LOWER 70S. HIGHS
IN THE UPPER 80S.

Zone Forecast

.REST OF TODAY...MOSTLY CLOUDY. SHOWERS AND THUNDERSTORMS IN THE
MORNING...THEN A CHANCE OF SHOWERS AND THUNDERSTORMS IN THE
AFTERNOON. HIGHS IN THE MID 80S. SOUTH WINDS 10 TO 15 MPH. CHANCE
OF PRECIPITATION 80 PERCENT.
.TONIGHT...SHOWERS AND THUNDERSTORMS LIKELY. LOWS IN THE MID 70S.
SOUTHWEST WINDS 10 TO 15 MPH. CHANCE OF PRECIPITATION 70 PERCENT.
.THURSDAY...SHOWERS AND THUNDERSTORMS LIKELY. HIGHS IN THE UPPER
80S. LIGHT AND VARIABLE WINDS EARLY IN THE MORNING BECOMING WEST
10 TO 15 MPH IN THE LATE MORNING AND AFTERNOON. CHANCE OF
PRECIPITATION 60 PERCENT.
.THURSDAY NIGHT...MOSTLY CLOUDY WITH A 40 PERCENT CHANCE OF
SHOWERS AND THUNDERSTORMS. LOWS IN THE LOWER 70S. LIGHT AND
VARIABLE WINDS.
.FRIDAY...PARTLY SUNNY WITH A 30 PERCENT CHANCE OF SHOWERS AND
THUNDERSTORMS. HIGHS IN THE UPPER 80S. LIGHT AND VARIABLE WINDS.
.FRIDAY NIGHT...PARTLY CLOUDY. LOWS IN THE UPPER 60S.
.SATURDAY...MOSTLY SUNNY. HIGHS IN THE MID 80S.
.SATURDAY NIGHT...MOSTLY CLEAR. LOWS IN THE LOWER 70S.
.SUNDAY...MOSTLY SUNNY. HIGHS IN THE UPPER 80S.
.SUNDAY NIGHT...PARTLY CLOUDY WITH A 30 PERCENT CHANCE OF SHOWERS
AND THUNDERSTORMS. LOWS IN THE LOWER 70S.
.MONDAY...MOSTLY SUNNY. HIGHS IN THE UPPER 80S.
.MONDAY NIGHT AND TUESDAY...PARTLY CLOUDY WITH A 20 PERCENT
CHANCE OF SHOWERS AND THUNDERSTORMS. LOWS IN THE LOWER 70S. HIGHS
IN THE UPPER 80S.

Short Term Weather

.NOW...

A LINE OF SCATTERED SHOWERS AND THUNDERSTORMS EXTENDS FROM
SOUTHERN WISCONSIN INTO THE NORTHERN TIER OF COUNTIES IN NORTHERN
ILLINOIS THIS MORNING AND IS MOVING STEADILY EAST. FREQUENT
LIGHTNING AND MODERATE TO LOCALLY HEAVY RAINFALL HAVE BOTH BEEN
ASSOCIATED WITH THIS STORM. TAKE CAUTION WHEN TRAVELING AS THERE
MAY BE BRIEF PONDING ON SOME ROADS.

Short Term Weather

.NOW...

A LINE OF SCATTERED SHOWERS AND THUNDERSTORMS EXTENDS FROM
SOUTHERN WISCONSIN INTO THE NORTHERN TIER OF COUNTIES IN NORTHERN
ILLINOIS THIS MORNING AND IS MOVING STEADILY EAST. FREQUENT
LIGHTNING...SMALL HAIL...AND MODERATE TO LOCALLY HEAVY RAINFALL
HAVE BEEN ASSOCIATED WITH THIS STORM. TAKE CAUTION WHEN OUTSIDE
AND ALSO WHEN DRIVING AS ROADWAYS MAY BE SLICK.

Hazardous Weather Outlook

THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTH CENTRAL ILLINOIS...
NORTHEAST ILLINOIS AND NORTHWEST INDIANA.

.DAY ONE...TODAY AND TONIGHT.

WEATHER HAZARDS EXPECTED:

ISOLATED THUNDERSTORMS...SOME MAY PRODUCE:

WIND GUSTS UP TO 60 MPH.
BRIEF HEAVY RAINFALL.
FREQUENT LIGHTNING.

AREAS AFFECTED AND TIMING:

ISOLATED THUNDERSTORMS ARE POSSIBLE THIS MORNING ALONG AND
NORTH OF A OREGON TO HARVARD LINE. THUNDERSTORM COVERAGE
INCREASES THIS AFTERNOON AND TONIGHT ALONG MAINLY ALONG AND
NORTH OF AN OTTAWA TO DE MOTTE LINE.

DISCUSSION:

A WARM FRONTAL BOUNDARY CONTINUES TO LIFT NORTH ACROSS
NORTHERN ILLINOIS THIS MORNING. THIS BOUNDARY WILL BECOME A
FOCAL POINT FOR ISOLATED THUNDERSTORMS THIS MORNING ACROSS
EXTREME NORTHWEST ILLINOIS. THIS AFTERNOON AND TONIGHT
THUNDERSTORMS ARE EXPECTED TO DEVELOP ACROSS IOWA AND
SOUTHERN MINNESOTA AND SLIDE EAST. WITH A VERY MOIST
ATMOSPHERE...SOME OF THESE THUNDERSTORMS COULD PRODUCE
BRIEF HEAVY DOWNPOURS AND LEAD TO LOCALIZED FLOODING. IN
ADDITION RENEWED CONCERNS FOR STREAMS AT OR NEAR BANKFULL
MAY BECOME FURTHER SWOLLEN IF THUNDERSTORMS ARE SLOW MOVING.

.DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY.

THERE IS A CHANCE THAT THUNDERSTORMS THURSDAY THROUGH FRIDAY.
THUNDERSTORMS MAY PRODUCE VERY HEAVY RAINFALL...
ESPECIALLY FOR LOCATIONS NORTH OF THE INTERSTATE 80 CORRIDOR.

HEAT AND HUMIDITY RETURNS TO NORTHERN ILLINOIS AND NORTHWEST
INDIANA THURSDAY...MAINLY SOUTH OF INTERSTATE 80 WHERE HEAT
INDICES MAY REACH 100 TO 110F.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION WILL NOT BE NECESSARY THROUGH TONIGHT.

&&

COMPLETE FORECAST INFORMATION IS AVAILABLE ON THE NWS CHICAGO
WEBPAGE: WEATHER.GOV/CHICAGO

Zone Forecast

.REST OF TONIGHT...CLEAR IN THE EVENING THEN BECOMING PARTLY
CLOUDY. LOWS IN THE MID 60S. EAST WINDS AROUND 10 MPH EARLY IN
THE EVENING BECOMING LIGHT AND VARIABLE IN THE LATE EVENING AND
EARLY MORNING...THEN BECOMING SOUTHEAST AROUND 10 MPH DURING THE
PREDAWN HOURS.
.WEDNESDAY...MOSTLY CLOUDY WITH A 30 PERCENT CHANCE OF SHOWERS
AND THUNDERSTORMS. HIGHS IN THE UPPER 80S. SOUTH WINDS 10 TO
15 MPH.
.WEDNESDAY NIGHT...SHOWERS AND THUNDERSTORMS LIKELY. LOWS IN THE
MID 70S. SOUTHWEST WINDS 10 TO 15 MPH. CHANCE OF PRECIPITATION
60 PERCENT.
.THURSDAY...MOSTLY CLOUDY WITH A 50 PERCENT CHANCE OF SHOWERS AND
THUNDERSTORMS. HIGHS IN THE UPPER 80S. PEAK AFTERNOON HEAT INDEX
READINGS 95 TO 100. SOUTHWEST WINDS AROUND 10 MPH.
.THURSDAY NIGHT...MOSTLY CLOUDY WITH A 40 PERCENT CHANCE OF
SHOWERS AND THUNDERSTORMS. LOWS IN THE LOWER 70S. LIGHT AND
VARIABLE WINDS.
.FRIDAY...PARTLY SUNNY WITH A 40 PERCENT CHANCE OF SHOWERS AND
THUNDERSTORMS. HIGHS IN THE MID 80S.
.FRIDAY NIGHT...MOSTLY CLEAR. LOWS IN THE UPPER 60S.
.SATURDAY...MOSTLY SUNNY. HIGHS IN THE MID 80S.
.SATURDAY NIGHT THROUGH MONDAY...MOSTLY CLEAR. LOWS IN THE UPPER
60S. HIGHS IN THE UPPER 80S.
.MONDAY NIGHT...PARTLY CLOUDY. LOWS IN THE LOWER 70S.
.TUESDAY...PARTLY CLOUDY WITH A 20 PERCENT CHANCE OF SHOWERS AND
THUNDERSTORMS. HIGHS IN THE UPPER 80S.

Hazardous Weather Outlook

THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTH CENTRAL ILLINOIS...
NORTHEAST ILLINOIS AND NORTHWEST INDIANA.

.DAY ONE...TONIGHT.

A FEW ISOLATED THUNDERSTORMS MAY OCCUR LATE THIS AFTERNOON AND
THIS EVENING ACROSS PORTIONS OF NORTH CENTRAL ILLINOIS...PRIMARILY
ALONG AND WEST OF A LINE FROM MENDOTA TO OTTAWA TO DWIGHT TO WATSEKA
TO FOWLER. THESE STORMS ARE EXPECTED TO REMAIN BELOW SEVERE LEVELS
THOUGH BRIEF HEAVY DOWNPOURS AND WIND GUSTS TO 45 MPH ARE POSSIBLE
WITH THE STRONGEST CELLS.

PORTIONS OF THE DES PLAINES RIVER WILL REMAIN NEAR BANKFULL
TONIGHT.

.DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY.

THERE WILL BE PERIODIC CHANCES FOR THUNDERSTORMS WEDNESDAY
THROUGH SATURDAY. THERE IS A CHANCE THAT THUNDERSTORMS WEDNESDAY
NIGHT AND THURSDAY NIGHT MAY PRODUCE VERY HEAVY RAINFALL...
ESPECIALLY FOR LOCATIONS NORTH OF THE INTERSTATE 80 CORRIDOR.

HEAT AND HUMIDITY RETURNS TO NORTHERN ILLINOIS AND NORTHWEST
INDIANA THURSDAY...MAINLY SOUTH OF INTERSTATE 80 WHERE HEAT
INDICES MAY REACH 100 TO 110F.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS NOT ANTICIPATED THROUGH TONIGHT.

&&

COMPLETE FORECAST INFORMATION IS AVAILABLE ON THE NWS CHICAGO
WEBPAGE: WEATHER.GOV/CHICAGO

Zone Forecast

.THIS AFTERNOON...MOSTLY SUNNY. HIGHS IN THE MID 80S. NORTHEAST
WINDS AROUND 10 MPH.
.TONIGHT...PARTLY CLOUDY. LOWS IN THE MID 60S. EAST WINDS 10 TO
15 MPH IN THE EVENING BECOMING LIGHT AND VARIABLE...THEN BECOMING
SOUTHEAST AROUND 10 MPH DURING THE PREDAWN HOURS.
.WEDNESDAY...MOSTLY CLOUDY WITH A 40 PERCENT CHANCE OF SHOWERS
AND THUNDERSTORMS. HIGHS IN THE UPPER 80S. SOUTH WINDS 10 TO
15 MPH WITH GUSTS UP TO 30 MPH AT TIMES.
.WEDNESDAY NIGHT...SHOWERS AND THUNDERSTORMS LIKELY. LOWS IN THE
MID 70S. SOUTHWEST WINDS AROUND 10 MPH. CHANCE OF PRECIPITATION
60 PERCENT.
.THURSDAY...MOSTLY CLOUDY WITH A 50 PERCENT CHANCE OF SHOWERS AND
THUNDERSTORMS. HIGHS IN THE UPPER 80S. SOUTHWEST WINDS AROUND
10 MPH.
.THURSDAY NIGHT...MOSTLY CLOUDY WITH A 50 PERCENT CHANCE OF
SHOWERS AND THUNDERSTORMS. LOWS IN THE MID 70S.
.FRIDAY...PARTLY SUNNY WITH A 40 PERCENT CHANCE OF SHOWERS AND
THUNDERSTORMS. HIGHS IN THE MID 80S.
.FRIDAY NIGHT...PARTLY CLOUDY. LOWS AROUND 70.
.SATURDAY THROUGH SUNDAY...MOSTLY CLEAR. HIGHS IN THE MID 80S.
LOWS IN THE UPPER 60S.
.SUNDAY NIGHT...PARTLY CLOUDY WITH A 20 PERCENT CHANCE OF SHOWERS
AND THUNDERSTORMS. LOWS IN THE LOWER 70S.
.MONDAY...PARTLY CLOUDY. HIGHS IN THE UPPER 80S.

Zone Forecast

.THIS AFTERNOON...MOSTLY SUNNY. HIGHS IN THE MID 80S. NORTHEAST
WINDS AROUND 10 MPH.
.TONIGHT...PARTLY CLOUDY. LOWS IN THE MID 60S. EAST WINDS 10 TO
15 MPH IN THE EVENING BECOMING LIGHT AND VARIABLE...THEN BECOMING
SOUTHEAST AROUND 10 MPH DURING THE PREDAWN HOURS.
.WEDNESDAY...MOSTLY CLOUDY WITH A 40 PERCENT CHANCE OF SHOWERS
AND THUNDERSTORMS. HIGHS IN THE UPPER 80S. SOUTH WINDS 10 TO
15 MPH WITH GUSTS UP TO 30 MPH AT TIMES.
.WEDNESDAY NIGHT...SHOWERS AND THUNDERSTORMS LIKELY. LOWS IN THE
MID 70S. SOUTHWEST WINDS AROUND 10 MPH. CHANCE OF PRECIPITATION
60 PERCENT.
.THURSDAY...MOSTLY CLOUDY WITH A 50 PERCENT CHANCE OF SHOWERS AND
THUNDERSTORMS. HIGHS IN THE UPPER 80S. SOUTHWEST WINDS AROUND
10 MPH.
.THURSDAY NIGHT...MOSTLY CLOUDY WITH A 50 PERCENT CHANCE OF
SHOWERS AND THUNDERSTORMS. LOWS IN THE MID 70S.
.FRIDAY...PARTLY SUNNY WITH A 40 PERCENT CHANCE OF SHOWERS AND
THUNDERSTORMS. HIGHS IN THE MID 80S.
.FRIDAY NIGHT...PARTLY CLOUDY. LOWS AROUND 70.
.SATURDAY THROUGH SUNDAY...MOSTLY CLEAR. HIGHS IN THE MID 80S.
LOWS IN THE UPPER 60S.
.SUNDAY NIGHT...PARTLY CLOUDY WITH A 20 PERCENT CHANCE OF SHOWERS
AND THUNDERSTORMS. LOWS IN THE LOWER 70S.
.MONDAY...PARTLY CLOUDY. HIGHS IN THE UPPER 80S.

Hazardous Weather Outlook

THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTH CENTRAL ILLINOIS...
NORTHEAST ILLINOIS AND NORTHWEST INDIANA.

.DAY ONE...THIS AFTERNOON AND TONIGHT.

PORTIONS OF THE DES PLAINES RIVER WILL REMAIN NEAR BANKFULL TODAY.

.DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY.

THERE WILL BE PERIODIC CHANCES FOR THUNDERSTORMS WEDNESDAY
THROUGH SATURDAY. THERE IS A CHANCE THAT THUNDERSTORMS WEDNESDAY
NIGHT AND THURSDAY NIGHT MAY PRODUCE VERY HEAVY RAINFALL...ESPECIALLY
FOR LOCATIONS NORTH OF THE INTERSTATE 80 CORRIDOR.

HEAT AND HUMIDITY RETURNS TO NORTHERN ILLINOIS AND NORTHWEST
INDIANA THURSDAY...MAINLY SOUTH OF INTERSTATE 80 WHERE HEAT
INDICES MAY REACH 100 TO 110F.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION WILL NOT BE NECESSARY THROUGH TONIGHT.

&&

COMPLETE FORECAST INFORMATION IS AVAILABLE ON THE NWS CHICAGO
WEBPAGE: WEATHER.GOV/CHICAGO

Zone Forecast

.REST OF TODAY...MOSTLY SUNNY. HIGHS IN THE MID 80S. NORTHEAST
WINDS AROUND 10 MPH.
.TONIGHT...PARTLY CLOUDY. LOWS IN THE MID 60S. EAST WINDS 10 TO
15 MPH IN THE EVENING BECOMING LIGHT AND VARIABLE...THEN BECOMING
SOUTHEAST AROUND 10 MPH DURING THE PREDAWN HOURS.
.WEDNESDAY...MOSTLY CLOUDY WITH A 40 PERCENT CHANCE OF SHOWERS
AND THUNDERSTORMS. HIGHS IN THE UPPER 80S. SOUTH WINDS 10 TO
15 MPH WITH GUSTS UP TO 30 MPH AT TIMES.
.WEDNESDAY NIGHT...SHOWERS AND THUNDERSTORMS LIKELY. LOWS IN THE
MID 70S. SOUTHWEST WINDS AROUND 10 MPH. CHANCE OF PRECIPITATION
60 PERCENT.
.THURSDAY...MOSTLY CLOUDY WITH A 50 PERCENT CHANCE OF SHOWERS AND
THUNDERSTORMS. HIGHS IN THE UPPER 80S. SOUTHWEST WINDS AROUND
10 MPH.
.THURSDAY NIGHT...MOSTLY CLOUDY WITH A 50 PERCENT CHANCE OF
SHOWERS AND THUNDERSTORMS. LOWS IN THE MID 70S.
.FRIDAY...PARTLY SUNNY WITH A 40 PERCENT CHANCE OF SHOWERS AND
THUNDERSTORMS. HIGHS IN THE MID 80S.
.FRIDAY NIGHT...PARTLY CLOUDY. LOWS AROUND 70.
.SATURDAY THROUGH SUNDAY...MOSTLY CLEAR. HIGHS IN THE MID 80S.
LOWS IN THE UPPER 60S.
.SUNDAY NIGHT...PARTLY CLOUDY WITH A 20 PERCENT CHANCE OF SHOWERS
AND THUNDERSTORMS. LOWS IN THE LOWER 70S.
.MONDAY...PARTLY CLOUDY. HIGHS IN THE UPPER 80S.

Radar Outage Notification

NOUS63 KLOT 261417
FTMLOT
Message Date: Jul 26 2011 14:17:52KLOT radar will be down for corrective maintenance until approx 2100Z.

Hazardous Weather Outlook

THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTH CENTRAL ILLINOIS...
NORTHEAST ILLINOIS AND NORTHWEST INDIANA.

.DAY ONE...TODAY AND TONIGHT.

PORTIONS OF THE DES PLAINES RIVER WILL REMAIN ABOVE FLOOD STAGE
THROUGH THIS MORNING.

.DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY.

THERE WILL BE PERIODIC CHANCES FOR THUNDERSTORMS WEDNESDAY
THROUGH SATURDAY. THERE IS A CHANCE THAT THUNDERSTORMS WEDNESDAY
NIGHT AND THURSDAY NIGHT MAY PRODUCE VERY HEAVY
RAINFALL...ESPECIALLY FOR LOCATIONS NORTH OF THE INTERSTATE 80
CORRIDOR.

HEAT AND HUMIDITY RETURNS TO NORTHERN ILLINOIS AND NORTHWEST
INDIANA THURSDAY...MAINLY SOUTH OF INTERSTATE 80 WHERE HEAT
INDICES MAY REACH 100 TO 110F.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION WILL NOT BE NECESSARY THROUGH TONIGHT.

&&

COMPLETE FORECAST INFORMATION IS AVAILABLE ON THE NWS CHICAGO
WEBPAGE: WEATHER.GOV/CHICAGO

Zone Forecast

.TODAY...MOSTLY SUNNY. HIGHS IN THE LOWER 80S. LIGHT AND VARIABLE
WINDS EARLY IN THE MORNING BECOMING NORTHEAST AROUND 10 MPH IN
THE LATE MORNING AND AFTERNOON.
.TONIGHT...PARTLY CLOUDY. LOWS IN THE MID 60S. EAST WINDS 10 TO
15 MPH IN THE EVENING BECOMING LIGHT AND VARIABLE...THEN BECOMING
SOUTHEAST AROUND 10 MPH DURING THE PREDAWN HOURS.
.WEDNESDAY...MOSTLY CLOUDY WITH A 40 PERCENT CHANCE OF SHOWERS
AND THUNDERSTORMS. HIGHS IN THE UPPER 80S. SOUTH WINDS 10 TO
15 MPH WITH GUSTS UP TO 30 MPH AT TIMES.
.WEDNESDAY NIGHT...SHOWERS AND THUNDERSTORMS LIKELY. LOWS IN THE
MID 70S. SOUTHWEST WINDS AROUND 10 MPH. CHANCE OF PRECIPITATION
60 PERCENT.
.THURSDAY...MOSTLY CLOUDY WITH A 50 PERCENT CHANCE OF SHOWERS AND
THUNDERSTORMS. HIGHS IN THE UPPER 80S. SOUTHWEST WINDS AROUND
10 MPH.
.THURSDAY NIGHT...MOSTLY CLOUDY WITH A 50 PERCENT CHANCE OF
SHOWERS AND THUNDERSTORMS. LOWS IN THE MID 70S.
.FRIDAY...PARTLY CLOUDY WITH A 40 PERCENT CHANCE OF SHOWERS AND
THUNDERSTORMS. HIGHS IN THE MID 80S.
.FRIDAY NIGHT...PARTLY CLOUDY. LOWS AROUND 70.
.SATURDAY THROUGH SUNDAY...MOSTLY CLEAR. HIGHS IN THE MID 80S.
LOWS IN THE UPPER 60S.
.SUNDAY NIGHT...PARTLY CLOUDY WITH A 20 PERCENT CHANCE OF SHOWERS
AND THUNDERSTORMS. LOWS IN THE LOWER 70S.
.MONDAY...PARTLY CLOUDY. HIGHS IN THE UPPER 80S.

Zone Forecast

.REST OF TONIGHT...CLEAR. LOWS IN THE MID 60S. LIGHT AND VARIABLE
WINDS.
.TUESDAY...MOSTLY SUNNY. HIGHS IN THE MID 80S. NORTHEAST WINDS
AROUND 10 MPH.
.TUESDAY NIGHT...PARTLY CLOUDY. LOWS IN THE MID 60S. SOUTHEAST
WINDS AROUND 10 MPH.
.WEDNESDAY...MOSTLY CLOUDY WITH A 40 PERCENT CHANCE OF SHOWERS
AND THUNDERSTORMS. HIGHS IN THE UPPER 80S. PEAK AFTERNOON HEAT
INDEX READINGS 95 TO 100. SOUTH WINDS 10 TO 15 MPH.
.WEDNESDAY NIGHT...MOSTLY CLOUDY WITH A 50 PERCENT CHANCE OF
SHOWERS AND THUNDERSTORMS. LOWS IN THE MID 70S. SOUTH WINDS
AROUND 10 MPH.
.THURSDAY...MOSTLY CLOUDY WITH A 50 PERCENT CHANCE OF SHOWERS AND
THUNDERSTORMS. HIGHS IN THE UPPER 80S.
.THURSDAY NIGHT...SHOWERS AND THUNDERSTORMS LIKELY. LOWS IN THE
MID 70S. CHANCE OF PRECIPITATION 60 PERCENT.
.FRIDAY...PARTLY CLOUDY WITH A 40 PERCENT CHANCE OF SHOWERS AND
THUNDERSTORMS. HIGHS IN THE MID 80S.
.FRIDAY NIGHT...MOSTLY CLEAR WITH A 20 PERCENT CHANCE OF SHOWERS
AND THUNDERSTORMS. LOWS IN THE UPPER 60S.
.SATURDAY THROUGH SUNDAY...PARTLY CLOUDY. HIGHS IN THE UPPER 80S.
LOWS IN THE UPPER 60S.
.SUNDAY NIGHT...PARTLY CLOUDY WITH A 40 PERCENT CHANCE OF SHOWERS
AND THUNDERSTORMS. LOWS AROUND 70.
.MONDAY...PARTLY CLOUDY WITH A 30 PERCENT CHANCE OF SHOWERS AND
THUNDERSTORMS. HIGHS IN THE UPPER 80S.

Radar Outage Notification

NOUS63 KLOT 252105
FTMLOT
Message Date: Jul 25 2011 21:05:09KLOT is back online.

Hazardous Weather Outlook

THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTH CENTRAL ILLINOIS...
NORTHEAST ILLINOIS AND NORTHWEST INDIANA.

.DAY ONE...TONIGHT.

LOCATIONS ON THE DES PLAINES RIVER WILL REMAIN ABOVE FLOOD STAGE
THROUGH TONIGHT.

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY.

THERE WILL BE PERIODIC CHANCES FOR THUNDERSTORMS WEDNESDAY
THROUGH SATURDAY. THERE IS A CHANCE THAT THUNDERSTORMS ON
WEDNESDAY NIGHT AND THURSDAY NIGHT MAY PRODUCE VERY HEAVY
RAINFALL...ESPECIALLY FOR LOCATIONS NORTH OF THE INTERSTATE 80
CORRIDOR.

HEAT MAY RETURN TO THE FORECAST AREA ON THURSDAY...MAINLY SOUTH OF
INTERSTATE 80 WHERE HEAT INDICES MAY REACH 100 TO 110F.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION WILL NOT BE NECESSARY THROUGH TONIGHT.

&&

COMPLETE FORECAST INFORMATION IS AVAILABLE ON THE NWS CHICAGO
WEBPAGE: WEATHER.GOV/CHICAGO

Zone Forecast

.TONIGHT...CLEAR. PATCHY FOG DURING THE PREDAWN HOURS. LOWS IN
THE MID 60S. LIGHT AND VARIABLE WINDS.
.TUESDAY...MOSTLY SUNNY. HIGHS IN THE MID 80S. LIGHT AND VARIABLE
WINDS UNTIL LATE AFTERNOON BECOMING NORTHEAST AROUND 10 MPH LATE
IN THE AFTERNOON.
.TUESDAY NIGHT...PARTLY CLOUDY. LOWS IN THE MID 60S. SOUTHEAST
WINDS AROUND 10 MPH.
.WEDNESDAY...MOSTLY CLOUDY WITH A 40 PERCENT CHANCE OF SHOWERS
AND THUNDERSTORMS. HIGHS IN THE UPPER 80S. PEAK AFTERNOON HEAT
INDEX READINGS 95 TO 100. SOUTH WINDS 10 TO 15 MPH.
.WEDNESDAY NIGHT...MOSTLY CLOUDY WITH A 50 PERCENT CHANCE OF
SHOWERS AND THUNDERSTORMS. LOWS IN THE MID 70S. SOUTH WINDS
AROUND 10 MPH.
.THURSDAY...MOSTLY CLOUDY WITH A 50 PERCENT CHANCE OF SHOWERS AND
THUNDERSTORMS. HIGHS IN THE UPPER 80S.
.THURSDAY NIGHT...SHOWERS AND THUNDERSTORMS LIKELY. LOWS IN THE
MID 70S. CHANCE OF PRECIPITATION 60 PERCENT.
.FRIDAY...PARTLY CLOUDY WITH A 40 PERCENT CHANCE OF SHOWERS AND
THUNDERSTORMS. HIGHS IN THE MID 80S.
.FRIDAY NIGHT...MOSTLY CLEAR WITH A 20 PERCENT CHANCE OF SHOWERS
AND THUNDERSTORMS. LOWS IN THE UPPER 60S.
.SATURDAY THROUGH SUNDAY...PARTLY CLOUDY. HIGHS IN THE UPPER 80S.
LOWS IN THE UPPER 60S.
.SUNDAY NIGHT...PARTLY CLOUDY WITH A 40 PERCENT CHANCE OF SHOWERS
AND THUNDERSTORMS. LOWS AROUND 70.
.MONDAY...PARTLY CLOUDY WITH A 30 PERCENT CHANCE OF SHOWERS AND
THUNDERSTORMS. HIGHS IN THE UPPER 80S.

Zone Forecast

.REST OF TODAY...SUNNY. HIGHS IN THE MID 80S. NORTHEAST WINDS
AROUND 10 MPH BECOMING LIGHT AND VARIABLE IN THE LATE AFTERNOON.
.TONIGHT...CLEAR. LOWS IN THE MID 60S. LIGHT AND VARIABLE WINDS.
.TUESDAY...MOSTLY SUNNY. HIGHS IN THE UPPER 80S. LIGHT AND
VARIABLE WINDS UNTIL LATE AFTERNOON BECOMING NORTHEAST AROUND
10 MPH LATE IN THE AFTERNOON.
.TUESDAY NIGHT...PARTLY CLOUDY. LOWS IN THE UPPER 60S. SOUTHEAST
WINDS AROUND 10 MPH.
.WEDNESDAY...MOSTLY CLOUDY WITH A 50 PERCENT CHANCE OF SHOWERS
AND THUNDERSTORMS. HIGHS IN THE UPPER 80S. PEAK AFTERNOON HEAT
INDEX READINGS 95 TO 100. SOUTH WINDS 10 TO 15 MPH.
.WEDNESDAY NIGHT...MOSTLY CLOUDY WITH A 40 PERCENT CHANCE OF
SHOWERS AND THUNDERSTORMS. LOWS IN THE MID 70S.
.THURSDAY...MOSTLY CLOUDY WITH A 50 PERCENT CHANCE OF SHOWERS AND
THUNDERSTORMS. HIGHS IN THE MID 80S.
.THURSDAY NIGHT...SHOWERS AND THUNDERSTORMS LIKELY. LOWS IN THE
LOWER 70S. CHANCE OF PRECIPITATION 70 PERCENT.
.FRIDAY...PARTLY SUNNY WITH A 40 PERCENT CHANCE OF SHOWERS AND
THUNDERSTORMS. HIGHS IN THE MID 80S.
.FRIDAY NIGHT THROUGH SUNDAY...MOSTLY CLEAR. LOWS IN THE UPPER
60S. HIGHS IN THE UPPER 80S.

Zone Forecast

.REST OF TODAY...SUNNY. HIGHS IN THE MID 80S. NORTHEAST WINDS
AROUND 10 MPH BECOMING LIGHT AND VARIABLE IN THE LATE AFTERNOON.
.TONIGHT...CLEAR. LOWS IN THE MID 60S. LIGHT AND VARIABLE WINDS.
.TUESDAY...MOSTLY SUNNY. HIGHS IN THE UPPER 80S. LIGHT AND
VARIABLE WINDS UNTIL LATE AFTERNOON BECOMING NORTHEAST AROUND
10 MPH LATE IN THE AFTERNOON.
.TUESDAY NIGHT...PARTLY CLOUDY. LOWS IN THE UPPER 60S. SOUTHEAST
WINDS AROUND 10 MPH.
.WEDNESDAY...MOSTLY CLOUDY WITH A 50 PERCENT CHANCE OF SHOWERS
AND THUNDERSTORMS. HIGHS IN THE UPPER 80S. PEAK AFTERNOON HEAT
INDEX READINGS 95 TO 100. SOUTH WINDS 10 TO 15 MPH.
.WEDNESDAY NIGHT...MOSTLY CLOUDY WITH A 40 PERCENT CHANCE OF
SHOWERS AND THUNDERSTORMS. LOWS IN THE MID 70S.
.THURSDAY...MOSTLY CLOUDY WITH A 50 PERCENT CHANCE OF SHOWERS AND
THUNDERSTORMS. HIGHS IN THE MID 80S.
.THURSDAY NIGHT...SHOWERS AND THUNDERSTORMS LIKELY. LOWS IN THE
LOWER 70S. CHANCE OF PRECIPITATION 70 PERCENT.
.FRIDAY...PARTLY SUNNY WITH A 40 PERCENT CHANCE OF SHOWERS AND
THUNDERSTORMS. HIGHS IN THE MID 80S.
.FRIDAY NIGHT THROUGH SUNDAY...MOSTLY CLEAR. LOWS IN THE UPPER
60S. HIGHS IN THE UPPER 80S.

Hazardous Weather Outlook

THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTH CENTRAL ILLINOIS...
NORTHEAST ILLINOIS AND NORTHWEST INDIANA.

.DAY ONE...TODAY AND TONIGHT.

LOCATIONS ON THE DES PLAINES RIVER WILL REMAIN ABOVE FLOOD STAGE
THROUGH TONIGHT.

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY.

THERE WILL BE PERIODIC CHANCES FOR THUNDERSTORMS WEDNESDAY
THROUGH SATURDAY. THERE IS A CHANCE THAT THUNDERSTORMS ON
WEDNESDAY AND THURSDAY MAY PRODUCE VERY HEAVY
RAINFALL...ESPECIALLY FOR LOCATIONS NORTH OF THE INTERSTATE 80
CORRIDOR.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION WILL NOT BE NECESSARY THROUGH TONIGHT.

&&

COMPLETE FORECAST INFORMATION IS AVAILABLE ON THE NWS CHICAGO
WEBPAGE: WEATHER.GOV/CHICAGO

Hazardous Weather Outlook

THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTH CENTRAL ILLINOIS...
NORTHEAST ILLINOIS AND NORTHWEST INDIANA.

.DAY ONE...TODAY AND TONIGHT.

LOCATIONS ON THE DES PLAINES AND DU PAGE RIVERS WILL REMAIN ABOVE
FLOOD STAGE THROUGH TONIGHT.

THERE IS AN ENHANCED RISK OF RIP CURRENTS AT THE INDIANA BEACHES
OF LAKE MICHIGAN.

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY.

THERE WILL BE PERIODIC CHANCES FOR THUNDERSTORMS WEDNESDAY
THROUGH SATURDAY. THERE IS A CHANCE THAT THUNDERSTORMS ON
WEDNESDAY AND THURSDAY MAY PRODUCE VERY HEAVY
RAINFALL...ESPECIALLY FOR LOCATIONS NORTH OF THE INTERSTATE 80
CORRIDOR.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION WILL NOT BE NECESSARY THROUGH TONIGHT.

&&

COMPLETE FORECAST INFORMATION IS AVAILABLE ON THE NWS CHICAGO
WEBPAGE: WEATHER.GOV/CHICAGO

Short Term Weather

.NOW...
PATCHY FOG HAS DEVELOPED EARLY THIS MORNING...AND IS EXPECTED TO
PERSIST UNTIL SHORTLY AFTER DAYBREAK FOR MUCH OF NORTHERN ILLINOIS
AND NORTHWEST INDIANA. VISIBILITIES WILL GENERALLY BE A FEW
MILES...HOWEVER IN A FEW LOCATIONS VISIBILITIES COULD BE REDUCED
FURTHER TO AROUND ONE HALF MILE. SHORTLY AFTER DAYBREAK
VISIBILITIES WILL STEADILY IMPROVE.

Zone Forecast

.REST OF TONIGHT...PARTLY CLOUDY. ISOLATED SHOWERS IN THE
EVENING. PATCHY FOG DURING THE PREDAWN HOURS. LOWS IN THE UPPER
60S. NORTHWEST WINDS AROUND 10 MPH EARLY IN THE EVENING BECOMING
LIGHT AND VARIABLE IN THE LATE EVENING AND OVERNIGHT. CHANCE OF
PRECIPITATION 20 PERCENT.
.MONDAY...MOSTLY SUNNY. HIGHS IN THE MID 80S. LIGHT AND VARIABLE
WINDS.
.MONDAY NIGHT...CLEAR. LOWS IN THE MID 60S. LIGHT AND VARIABLE
WINDS.
.TUESDAY...MOSTLY SUNNY. HIGHS IN THE UPPER 80S. THEN
TEMPERATURES FALLING INTO THE LOWER 80S BY EVENING. LIGHT AND
VARIABLE WINDS.
.TUESDAY NIGHT...PARTLY CLOUDY. LOWS IN THE UPPER 60S. LIGHT AND
VARIABLE WINDS.
.WEDNESDAY...PARTLY SUNNY WITH A 40 PERCENT CHANCE OF LIGHT
SHOWERS AND THUNDERSTORMS. HIGHS IN THE UPPER 80S.
.WEDNESDAY NIGHT...PARTLY CLOUDY WITH A 40 PERCENT CHANCE OF
SHOWERS AND THUNDERSTORMS. LOWS IN THE UPPER 70S.
.THURSDAY...MOSTLY CLOUDY WITH A 30 PERCENT CHANCE OF SHOWERS AND
THUNDERSTORMS. HIGHS IN THE UPPER 80S.
.THURSDAY NIGHT...SHOWERS AND THUNDERSTORMS LIKELY. LOWS IN THE
LOWER 70S. CHANCE OF PRECIPITATION 60 PERCENT.
.FRIDAY...PARTLY SUNNY WITH A 40 PERCENT CHANCE OF SHOWERS AND
THUNDERSTORMS. HIGHS IN THE MID 80S.
.FRIDAY NIGHT THROUGH SUNDAY...MOSTLY CLEAR. LOWS IN THE MID 60S.
HIGHS IN THE MID 80S.

Zone Forecast

.REST OF TONIGHT...PARTLY CLOUDY. ISOLATED SHOWERS IN THE
EVENING. PATCHY FOG DURING THE PREDAWN HOURS. LOWS IN THE UPPER
60S. NORTHWEST WINDS AROUND 10 MPH EARLY IN THE EVENING BECOMING
LIGHT AND VARIABLE IN THE LATE EVENING AND OVERNIGHT. CHANCE OF
PRECIPITATION 20 PERCENT.
.MONDAY...MOSTLY SUNNY. HIGHS IN THE MID 80S. LIGHT AND VARIABLE
WINDS.
.MONDAY NIGHT...CLEAR. LOWS IN THE MID 60S. LIGHT AND VARIABLE
WINDS.
.TUESDAY...MOSTLY SUNNY. HIGHS IN THE UPPER 80S. THEN
TEMPERATURES FALLING INTO THE LOWER 80S BY EVENING. LIGHT AND
VARIABLE WINDS.
.TUESDAY NIGHT...PARTLY CLOUDY. LOWS IN THE UPPER 60S. LIGHT AND
VARIABLE WINDS.
.WEDNESDAY...PARTLY SUNNY WITH A 40 PERCENT CHANCE OF LIGHT
SHOWERS AND THUNDERSTORMS. HIGHS IN THE UPPER 80S.
.WEDNESDAY NIGHT...PARTLY CLOUDY WITH A 40 PERCENT CHANCE OF
SHOWERS AND THUNDERSTORMS. LOWS IN THE UPPER 70S.
.THURSDAY...MOSTLY CLOUDY WITH A 30 PERCENT CHANCE OF SHOWERS AND
THUNDERSTORMS. HIGHS IN THE UPPER 80S.
.THURSDAY NIGHT...SHOWERS AND THUNDERSTORMS LIKELY. LOWS IN THE
LOWER 70S. CHANCE OF PRECIPITATION 60 PERCENT.
.FRIDAY...PARTLY SUNNY WITH A 40 PERCENT CHANCE OF SHOWERS AND
THUNDERSTORMS. HIGHS IN THE MID 80S.
.FRIDAY NIGHT THROUGH SUNDAY...MOSTLY CLEAR. LOWS IN THE MID 60S.
HIGHS IN THE MID 80S.

Zone Forecast

.TONIGHT...MOSTLY CLOUDY BECOMING PARTLY CLOUDY. PATCHY FOG DURING
THE PREDAWN HOURS. LOWS IN THE UPPER 60S. NORTHWEST WINDS AROUND
10 MPH EARLY IN THE EVENING BECOMING LIGHT AND VARIABLE IN THE
LATE EVENING AND OVERNIGHT.
.MONDAY...MOSTLY SUNNY. HIGHS IN THE MID 80S. LIGHT AND VARIABLE
WINDS.
.MONDAY NIGHT...CLEAR. LOWS IN THE MID 60S. LIGHT AND VARIABLE
WINDS.
.TUESDAY...MOSTLY SUNNY. HIGHS IN THE UPPER 80S. THEN
TEMPERATURES FALLING INTO THE LOWER 80S BY EVENING. LIGHT AND
VARIABLE WINDS.
.TUESDAY NIGHT...PARTLY CLOUDY. LOWS IN THE UPPER 60S. LIGHT AND
VARIABLE WINDS.
.WEDNESDAY...PARTLY SUNNY WITH A 40 PERCENT CHANCE OF LIGHT
SHOWERS AND THUNDERSTORMS. HIGHS IN THE UPPER 80S.
.WEDNESDAY NIGHT...PARTLY CLOUDY WITH A 40 PERCENT CHANCE OF
SHOWERS AND THUNDERSTORMS. LOWS IN THE UPPER 70S.
.THURSDAY...MOSTLY CLOUDY WITH A 30 PERCENT CHANCE OF SHOWERS AND
THUNDERSTORMS. HIGHS IN THE UPPER 80S.
.THURSDAY NIGHT...SHOWERS AND THUNDERSTORMS LIKELY. LOWS IN THE
LOWER 70S. CHANCE OF PRECIPITATION 60 PERCENT.
.FRIDAY...PARTLY SUNNY WITH A 40 PERCENT CHANCE OF SHOWERS AND
THUNDERSTORMS. HIGHS IN THE MID 80S.
.FRIDAY NIGHT THROUGH SUNDAY...MOSTLY CLEAR. LOWS IN THE MID 60S.
HIGHS IN THE MID 80S.

Hazardous Weather Outlook

THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTH CENTRAL ILLINOIS...
NORTHEAST ILLINOIS AND NORTHWEST INDIANA.

.DAY ONE...TONIGHT.

WEATHER HAZARDS EXPECTED:

ISOLATED THUNDERSTORMS...SOME MAY PRODUCE:

BRIEF HEAVY RAINFALL.
FREQUENT LIGHTNING.

AREAS AFFECTED AND TIMING:

A COLD FRONT MOVING SOUTHEAST ACROSS THE REGION COULD SPARK
ADDITIONAL SHOWERS AND THUNDERSTORMS ACROSS NORTHERN ILLINOIS
THIS EVENING. THE GREATEST THREAT IS ACROSS NORTH CENTRAL
ILLINOIS...WEST OF THE FOX RIVER VALLEY.

DISCUSSION:

A COLD FRONT SAGGING SOUTH ACROSS THE FORECAST AREA IS EXPECTED
TO BE THE FOCAL POINT FOR ANY NEW THUNDERSTORM DEVELOPMENT INTO
THE EVENING. LINGERING CLOUD COVER HOWEVER IS MAKING IT
DIFFICULT FOR THE ATMOSPHERE TO BECOME UNSTABLE...THUS MANY
AREAS MAY SEE THE COLD FRONT PASS THROUGH DRY.

LOCATIONS ON THE DES PLAINES AND DU PAGE RIVERS WILL REMAIN
ABOVE FLOOD STAGE THROUGH TONIGHT.

.DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY.

THERE WILL BE PERIODIC CHANCES FOR THUNDERSTORMS WEDNESDAY
THROUGH SATURDAY.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION WILL NOT BE NECESSARY THROUGH TONIGHT.

&&

COMPLETE FORECAST INFORMATION IS AVAILABLE ON THE NWS CHICAGO
WEBPAGE: WEATHER.GOV/CHICAGO

Hazardous Weather Outlook

THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTH CENTRAL ILLINOIS...
NORTHEAST ILLINOIS AND NORTHWEST INDIANA.

.DAY ONE...THIS AFTERNOON AND TONIGHT.

WEATHER HAZARDS EXPECTED:

SCATTERED THUNDERSTORMS...SOME MAY PRODUCE:

BRIEF HEAVY RAINFALL.
FREQUENT LIGHTNING.

AREAS AFFECTED AND TIMING:

A COLD FRONT MOVING SOUTHEAST ACROSS THE REGION COULD SPARK
ADDITIONAL SHOWERS AND THUNDERSTORMS ACROSS NORTHERN ILLINOIS
AND NORTHWEST INDIANA THIS AFTERNOON AND EVENING.

DISCUSSION:

ELEVATED THUNDERSTORMS HAVE ALREADY DEVELOPED EARLY THIS
AFTERNOON ACROSS EASTERN IOWA AND NORTHWESTERN ILLINOIS. A
CONDITIONAL SEVERE THREAT WOULD BE DEPENDANT ON THE BOUNDARY
LAYER RECOVERING FROM EARLIER CONVECTION.

LOCATIONS ON THE DES PLAINES AND DU PAGE RIVERS WILL REMAIN
ABOVE FLOOD STAGE THROUGH TONIGHT.

.DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY.

THERE WILL BE PERIODIC CHANCES FOR THUNDERSTORMS WEDNESDAY
THROUGH SATURDAY.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION WILL NOT BE NECESSARY THROUGH TONIGHT.

&&

COMPLETE FORECAST INFORMATION IS AVAILABLE ON THE NWS CHICAGO
WEBPAGE: WEATHER.GOV/CHICAGO

Zone Forecast

.THIS AFTERNOON...PARTLY SUNNY WITH A 40 PERCENT CHANCE OF
SHOWERS AND THUNDERSTORMS. HIGHS IN THE MID 80S. WEST WINDS
AROUND 10 MPH.
.TONIGHT...PARTLY CLOUDY. LOWS IN THE MID 60S. LIGHT AND VARIABLE
WINDS.
.MONDAY...MOSTLY SUNNY. HIGHS IN THE MID 80S. LIGHT AND VARIABLE
WINDS.
.MONDAY NIGHT...MOSTLY CLEAR. LOWS IN THE MID 60S. LIGHT AND
VARIABLE WINDS.
.TUESDAY...MOSTLY SUNNY. HIGHS IN THE MID 80S. LIGHT AND VARIABLE
WINDS.
.TUESDAY NIGHT...PARTLY CLOUDY. LOWS AROUND 70.
.WEDNESDAY...PARTLY SUNNY WITH A 40 PERCENT CHANCE OF SHOWERS AND
THUNDERSTORMS. HIGHS IN THE UPPER 80S.
.WEDNESDAY NIGHT...PARTLY CLOUDY WITH A 50 PERCENT CHANCE OF
SHOWERS AND THUNDERSTORMS. LOWS IN THE MID 70S.
.THURSDAY AND THURSDAY NIGHT...MOSTLY CLOUDY WITH A 50 PERCENT
CHANCE OF SHOWERS AND THUNDERSTORMS. HIGHS AROUND 90. LOWS IN THE
MID 70S.
.FRIDAY...PARTLY SUNNY WITH A 30 PERCENT CHANCE OF SHOWERS AND
THUNDERSTORMS. HIGHS IN THE UPPER 80S.
.FRIDAY NIGHT...MOSTLY CLEAR WITH A 20 PERCENT CHANCE OF SHOWERS
AND THUNDERSTORMS. LOWS IN THE LOWER 70S.
.SATURDAY...MOSTLY SUNNY. HIGHS IN THE MID 80S.

Hazardous Weather Outlook

THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTH CENTRAL ILLINOIS...
NORTHEAST ILLINOIS AND NORTHWEST INDIANA.

.DAY ONE...THIS AFTERNOON AND TONIGHT.

WEATHER HAZARDS EXPECTED:

SCATTERED THUNDERSTORMS...SOME MAY PRODUCE:

BRIEF HEAVY RAINFALL.
FREQUENT LIGHTNING.

OPPRESSIVE HEAT AND HUMIDITY.

AREAS AFFECTED AND TIMING:

A COLD FRONT MOVING SOUTHEAST ACROSS THE REGION COULD SPARK
ADDITIONAL SHOWERS AND THUNDERSTORMS ACROSS NORTHERN ILLINOIS
AND NORTHWEST INDIANA THIS AFTERNOON AND EVENING.

THE DANGEROUS HEAT AND HUMIDITY WILL CONTINUE...MAINLY
SOUTH OF THE INTERSTATE 80 CORRIDOR.

DISCUSSION:

AS THE ATMOSPHERE BEGINS TO RECOVER FROM THIS MORNINGS
THUNDERSTORM ACTIVITY...THERE MAY BE ENOUGH INSTABILITY THAT
DEVELOPS FOR ADDITIONAL THUNDERSTORMS TO GENERATE ALONG AND
AHEAD OF A COLD FRONT MOVING ACROSS THE REGION THIS AFTERNOON
AND EVENING. WITH WEAK FLOW ALOFT...SEVERE THUNDERSTORMS ARE
NOT EXPECTED...HOWEVER ADDITIONAL RAINFALL MAY COMPOUND
FLOODING PROBLEMS DUE TO RECENT HEAVY RAIN AND SATURATED SOILS.

LOCATIONS ON THE DES PLAINES AND DU PAGE RIVERS WILL REMAIN
ABOVE FLOOD STAGE THROUGH TONIGHT.

HEAT INDEX VALUES ARE EXPECTED TO RISE TO 105 TO 110 DEGREES
THIS AFTERNOON FOR LOCATIONS SOUTH OF A LINE FROM STREATOR
TO PEOTONE. SHOWERS AND THUNDERSTORMS THIS MORNING...AND
LINGERING CLOUD COVER HAVE COMPLICATED TEMPERATURE
FORECAST...AND MAY KEEP SOME AREAS COOLER.

.DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY.

THERE WILL BE PERIODIC CHANCES FOR THUNDERSTORMS WEDNESDAY
THROUGH SATURDAY.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION WILL NOT BE NECESSARY THROUGH TONIGHT.

&&

COMPLETE FORECAST INFORMATION IS AVAILABLE ON THE NWS CHICAGO
WEBPAGE: WEATHER.GOV/CHICAGO

Zone Forecast

.THIS AFTERNOON...PARTLY SUNNY WITH A 40 PERCENT CHANCE OF
SHOWERS AND THUNDERSTORMS. HIGHS IN THE UPPER 80S. PEAK AFTERNOON
HEAT INDEX READINGS 95 TO 100. WEST WINDS AROUND 10 MPH.
.TONIGHT...PARTLY CLOUDY. LOWS IN THE MID 60S. LIGHT AND VARIABLE
WINDS.
.MONDAY...MOSTLY SUNNY. HIGHS IN THE MID 80S. LIGHT AND VARIABLE
WINDS.
.MONDAY NIGHT...MOSTLY CLEAR. LOWS IN THE MID 60S. LIGHT AND
VARIABLE WINDS.
.TUESDAY...MOSTLY SUNNY. HIGHS IN THE MID 80S. LIGHT AND VARIABLE
WINDS.
.TUESDAY NIGHT...PARTLY CLOUDY. LOWS AROUND 70.
.WEDNESDAY...PARTLY SUNNY WITH A 40 PERCENT CHANCE OF SHOWERS AND
THUNDERSTORMS. HIGHS IN THE UPPER 80S.
.WEDNESDAY NIGHT...PARTLY CLOUDY WITH A 50 PERCENT CHANCE OF
SHOWERS AND THUNDERSTORMS. LOWS IN THE MID 70S.
.THURSDAY AND THURSDAY NIGHT...MOSTLY CLOUDY WITH A 50 PERCENT
CHANCE OF SHOWERS AND THUNDERSTORMS. HIGHS AROUND 90. LOWS IN THE
MID 70S.
.FRIDAY...PARTLY SUNNY WITH A 30 PERCENT CHANCE OF SHOWERS AND
THUNDERSTORMS. HIGHS IN THE UPPER 80S.
.FRIDAY NIGHT...MOSTLY CLEAR WITH A 20 PERCENT CHANCE OF SHOWERS
AND THUNDERSTORMS. LOWS IN THE LOWER 70S.
.SATURDAY...MOSTLY SUNNY. HIGHS IN THE MID 80S.

Hazardous Weather Outlook

THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTH CENTRAL ILLINOIS...
NORTHEAST ILLINOIS AND NORTHWEST INDIANA.

.DAY ONE...TODAY AND TONIGHT.

WEATHER HAZARDS EXPECTED:

THUNDERSTORMS...SOME MAY PRODUCE:

HEAVY RAINFALL WITH FLASH FLOODING.
FREQUENT LIGHTNING.
DAMAGING WINDS IN EXCESS OF 60 MPH.

OPPRESSIVE HEAT AND HUMIDITY.

AREAS AFFECTED AND TIMING:

THUNDERSTORMS ALONG AND AHEAD OF A COLD FRONT WILL MOVE INTO
NORTHWESTERN ILLINOIS THIS MORNING AND THEN SPREAD SLOWLY SOUTH
AND EAST INTO EAST-CENTRAL ILLINOIS AND NORTHWESTERN INDIANA
LATER TODAY.

THE DANGEROUS HEAT AND HUMIDITY WILL CONTINUE...ESPECIALLY
SOUTH OF INTERSTATE 80.

DISCUSSION:

THUNDERSTORMS ARE EXPECTED TO BRING MORE HEAVY RAINFALL TO
NORTHERN ILLINOIS AND NORTHWESTERN INDIANA TODAY. SINCE THE
GROUND IS SATURATED AND AREA RIVERS SWOLLEN FROM THE VERY HEAVY
RAINFALL OF THE PAST FEW DAYS...IT WILL NOT TAKE VERY MUCH
ADDITIONAL RAINFALL TO BRING A RISK OF ADDITIONAL FLASH
FLOODING TO THE AREA. WITH A VERY MOIST AIRMASS IN PLACE AND
LITTLE PUSH BEHIND THE APPROACHING COLD FRONT...THUNDERSTORMS
WILL BE EFFICIENT RAIN PRODUCERS AND HEAVY RAINFALL IS LIKELY.
THUS THE FLASH FLOOD WATCH WILL REMAIN IN EFFECT FOR PORTIONS
OF THE AREA GENERALLY NORTH OF INTERSTATE 80.

LOCATIONS ON THE DES PLAINES AND DU PAGE RIVERS WILL REMAIN
ABOVE FLOOD STAGE THROUGH TONIGHT.

HEAT INDEX VALUES ARE EXPECTED TO RISE TO 110 TO 115 DEGREES
THIS AFTERNOON FOR LOCATIONS SOUTH OF THE ILLINOIS AND KANKAKEE
RIVERS

.DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY.

THERE WILL BE PERIODIC CHANCES FOR THUNDERSTORMS WEDNESDAY
THROUGH SATURDAY.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION MAY BE NECESSARY TODAY...ESPECIALLY FOR FLASH
FLOODING AND STRONG...DAMAGING WINDS.

&&

COMPLETE FORECAST INFORMATION IS AVAILABLE ON THE NWS CHICAGO
WEBPAGE: WEATHER.GOV/CHICAGO

Zone Forecast

...FLASH FLOOD WATCH IN EFFECT THROUGH THIS EVENING...

.TODAY...MOSTLY CLOUDY. SHOWERS AND THUNDERSTORMS LIKELY IN THE
MORNING...THEN A CHANCE OF SHOWERS AND THUNDERSTORMS IN THE
AFTERNOON. HIGHS AROUND 90. HIGHEST HEAT INDEX READINGS 95 TO
100 IN THE AFTERNOON. LIGHT AND VARIABLE WINDS. CHANCE OF
PRECIPITATION 60 PERCENT.
.TONIGHT...PARTLY CLOUDY. LOWS IN THE MID 60S. LIGHT AND VARIABLE
WINDS.
.MONDAY...MOSTLY SUNNY. HIGHS IN THE MID 80S. LIGHT AND VARIABLE
WINDS.
.MONDAY NIGHT...MOSTLY CLEAR. LOWS IN THE MID 60S. LIGHT AND
VARIABLE WINDS.
.TUESDAY...MOSTLY SUNNY. HIGHS IN THE MID 80S. LIGHT AND VARIABLE
WINDS.
.TUESDAY NIGHT...PARTLY CLOUDY. LOWS AROUND 70.
.WEDNESDAY...PARTLY SUNNY WITH A 40 PERCENT CHANCE OF SHOWERS AND
THUNDERSTORMS. HIGHS IN THE UPPER 80S.
.WEDNESDAY NIGHT...PARTLY CLOUDY WITH A 50 PERCENT CHANCE OF
SHOWERS AND THUNDERSTORMS. LOWS IN THE MID 70S.
.THURSDAY AND THURSDAY NIGHT...MOSTLY CLOUDY WITH A 50 PERCENT
CHANCE OF SHOWERS AND THUNDERSTORMS. HIGHS AROUND 90. LOWS IN THE
MID 70S.
.FRIDAY...PARTLY SUNNY WITH A 30 PERCENT CHANCE OF SHOWERS AND
THUNDERSTORMS. HIGHS IN THE UPPER 80S.
.FRIDAY NIGHT...MOSTLY CLEAR WITH A 20 PERCENT CHANCE OF SHOWERS
AND THUNDERSTORMS. LOWS IN THE LOWER 70S.
.SATURDAY...MOSTLY SUNNY. HIGHS IN THE MID 80S.