Hazard Report Provided By forecast.weather.gov

Hazardous Weather Outlook
National Weather Service Chicago/Romeoville IL
412 AM CDT Fri Jul 3 2026

ILZ003>006-008-010>013-019>021-023-032-033-039-103>108-INZ001-002-
010-011-019-040915-
Winnebago-Boone-McHenry-Lake IL-Ogle-Lee-De Kalb-Kane-DuPage-
La Salle-Kendall-Grundy-Kankakee-Livingston-Iroquois-Ford-
Northern Cook-Central Cook-Southern Cook-Northern Will-
Southern Will-Eastern Will-Lake IN-Porter-Newton-Jasper-Benton-
412 AM CDT Fri Jul 3 2026 /512 AM EDT Fri Jul 3 2026/

This Hazardous Weather Outlook is for portions of north central
Illinois...northeast Illinois and northwest Indiana.

.DAY ONE...Today and Tonight.

Weather hazards expected...

  Elevated Thunderstorm Risk...with an associated:
     Level 2 of 5 Damaging Wind Risk...up to 70 mph.
     Level 1 of 5 Large Hail Risk...up to quarter size.
  Limited Flooding Risk.
  Elevated Excessive Heat Risk south of I-80.

DISCUSSION...

Multiple rounds of showers and thunderstorms are forecast this
afternoon through tonight. Any storms will be capable of
producing damaging winds. There will also be a threat for
localized flash flooding with any focused corridors of storms.

Hot and humid conditions will continue through this afternoon
with peak heat indices of 100 to 105 south of I-80.

.DAYS TWO THROUGH SEVEN...Saturday through Thursday.

Saturday...
  Elevated Thunderstorm Risk...with an associated:
     Level 1 of 5 Severe Thunderstorm Risk.
  Limited Flooding Risk.
  Limited Excessive Heat Risk south of I-80.
Sunday and Thursday...
  Limited Thunderstorm Risk.

.SPOTTER INFORMATION STATEMENT...

  Spotters may be needed this afternoon and evening.

GENERAL STORM MOTION OF THE DAY:

  Moving toward the east at 30 to 40 mph.

$$

Flood Advisory
National Weather Service Chicago IL
801 AM CDT Fri Jul 3 2026

ILC031-043-089-093-197-031600-
/O.NEW.KLOT.FA.Y.0056.260703T1301Z-260703T1600Z/
/00000.N.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Cook IL-DuPage IL-Kane IL-Kendall IL-Will IL-
801 AM CDT Fri Jul 3 2026

...FLOOD ADVISORY IN EFFECT UNTIL 11 AM CDT THIS MORNING...

* WHAT...Flooding caused by overnight rainfall is occurring.

* WHERE...A portion of northeast Illinois, including the following
  counties, Cook, DuPage, Kane, Kendall and Will.

* WHEN...Until 1100 AM CDT.

* IMPACTS...River gauges indicate that many creeks in the Advisory
  Area are near bankfull due to overnight thunderstorms. In
  addition, there is likely standing water in ditches and other
  low-lying areas. Water is expected to slowly recede through the
  morning.

* ADDITIONAL DETAILS...
  - At 759 AM CDT, River gauges indicate that many creeks in the
    Advisory Area are near bankfull due to overnight
    thunderstorms.
  - Some locations that will experience flooding include...
    Chicago, Aurora, Naperville, Elgin, Cicero, Arlington
    Heights, Evanston, Schaumburg, Bolingbrook, Skokie, Des
    Plaines, Berwyn, Mount Prospect, Wheaton, Hoffman Estates,
    Oak Park, Downers Grove, Glenview, Elmhurst and Lombard.
  - http://www.weather.gov/safety/flood

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Flood Advisory means minor flooding along waterways and other poor
drainage areas is imminent or may already be occurring. Persons in
the advisory area should use caution and avoid flood waters.

&&

LAT...LON 4190 8826 4199 8826 4215 8774 4211 8770
      4208 8767 4206 8765 4203 8765 4199 8764
      4197 8762 4195 8762 4191 8761 4190 8758
      4188 8759 4188 8760 4182 8758 4158 8860
      4176 8860


$$

Borchardt

Flood Warning
National Weather Service Chicago IL
759 AM CDT Fri Jul 3 2026

ILC031-043-031900-
/O.NEW.KLOT.FA.W.0008.260703T1259Z-260703T1900Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Cook IL-DuPage IL-
759 AM CDT Fri Jul 3 2026

...FLOOD WARNING IN EFFECT UNTIL 2 PM CDT THIS AFTERNOON...

* WHAT...Flooding caused by overnight rainfall is occurring.

* WHERE...Portions of southern DuPage and far western Cook counties
  in northeastern Illinois.

* WHEN...Until 200 PM CDT Friday.

* IMPACTS...Based on river gauge reports, flooding is occurring
  along the DuPage River near the Morton Arboretum. Water may start
  to encroach Illinois Route 53 and other roadways near the river in
  the area. In addition, River levels are near flood stage along
  Salt Creek in Western Springs.

* ADDITIONAL DETAILS...
  - At 756 AM CDT, gauge reports indicated elevated river levels
    due to overnight rainfall. Between 2 and 4 inches of rain
    fell overnight.
  - Some locations that will experience flooding include...
    Aurora, Naperville, Wheaton, Downers Grove, Lombard,
    Woodridge, Glen Ellyn, Hinsdale, Westchester, Burr Ridge, Oak
    Brook, Westmont, Lisle, La Grange Park, Warrenville, Western
    Springs, Willowbrook, Clarendon Hills, Hillside and Oakbrook
    Terrace.
  - http://www.weather.gov/safety/flood

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Flood Warning means flooding is imminent or may already be
occurring. Persons along rivers, creeks, and other waterways should
take immediate precautions to protect life and property.

&&

LAT...LON 4178 8789 4174 8826 4184 8826 4184 8822
      4186 8789


$$

Borchardt

Hazard Report Provided By forecast.weather.gov