Hazard Report Provided By forecast.weather.gov

Hazardous Weather Outlook
National Weather Service Chicago/Romeoville IL
324 PM CDT Thu Jul 2 2026

ILZ003>006-008-010>013-019>021-023-032-033-039-103>108-INZ001-002-
010-011-019-032030-
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-
324 PM CDT Thu Jul 2 2026 /424 PM EDT Thu Jul 2 2026/

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

.DAY ONE...Tonight.

Weather hazards expected...

  Elevated Excessive Heat Risk Through This Evening.
  Limited Thunderstorm Risk...with an associated:
     Level 1 of 5 Damaging Wind Risk...up to 60 mph.
     Level 1 of 5 Large Hail Risk...up to quarter size.
     Limited Flooding Risk.

DISCUSSION...

An isolated thunderstorm is possible this afternoon north of I-90
in far northern Illinois and south of US-24 in central Illinois.

Scattered thunderstorms are forecast this evening into the
overnight hours, especially near and north of I-80. A few
of these thunderstorms may be strong to severe.

Hot and humid conditions will continue through this evening.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday.

Friday...
  Elevated Thunderstorm Risk...with an associated:
     Level 2 of 5 Severe Thunderstorm Risk.
     Limited Flooding Risk.
  Elevated Excessive Heat Risk south of I-80.
Saturday...
  Limited Thunderstorm Risk...with an associated:
     Level 1 of 5 Severe Thunderstorm Risk.
     Limited Flooding Risk.
Sunday...
  Limited Thunderstorm Risk.

DISCUSSION...

Scattered thunderstorms are probable Friday afternoon across the
entire area and then into early Friday evening across northwest
Indiana. Some of these storms may become severe with damaging
winds the primary severe weather threat.

.SPOTTER INFORMATION STATEMENT...

Spotters may be needed tonight.

GENERAL STORM MOTION OF THE DAY:

Moving toward the east at 40 mph.

$$

URGENT - WEATHER MESSAGE
National Weather Service Chicago IL
148 PM CDT Thu Jul 2 2026

ILZ003>006-008-010>013-019>021-106>108-INZ001-002-030500-
/O.CON.KLOT.XH.W.0001.000000T0000Z-260703T0500Z/
Winnebago-Boone-McHenry-Lake IL-Ogle-Lee-De Kalb-Kane-DuPage-La
Salle-Kendall-Grundy-Northern Will-Southern Will-Eastern Will-
Lake IN-Porter-
Including the cities of Buffalo Grove, Waukegan, Byron,
Algonquin, Bolingbrook, Channahon, La Salle, Crystal Lake,
Joliet, Wilmington, Merrillville, Coal City, Elgin, Gurnee,
Manhattan, Portage, Mokena, Carol Stream, DeKalb, Mundelein,
Plano, Aurora, Streator, Wheaton, Marseilles, Downers Grove,
Chesterton, Oswego, Gary, Hammond, Oregon, Peotone, Ottawa,
Dixon, Mendota, Yorkville, Valparaiso, Minooka, Sycamore,
Rochelle, Beecher, Crete, Naperville, Plainfield, Belvidere,
Morris, Woodstock, McHenry, Lombard, and Rockford
148 PM CDT Thu Jul 2 2026

...EXTREME HEAT WARNING REMAINS IN EFFECT UNTIL MIDNIGHT CDT
TONIGHT...

* WHAT...Dangerously hot conditions with heat index values up to 105
  degrees.

* WHERE...Portions of north central and northeast Illinois and
  northwest Indiana.

* WHEN...Until midnight CDT tonight.

* IMPACTS...Heat related illnesses increase significantly during
  extreme heat and high humidity events.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Take extra precautions when outside. Wear lightweight and loose
fitting clothing. Try to limit strenuous activities to early morning
or evening. Take action when you see symptoms of heat exhaustion and
heat stroke. Stay cool, stay hydrated, stay informed.

Do not leave young children and pets in unattended vehicles. Car
interiors will reach lethal temperatures in a matter of minutes.

&&

$$

Hazard Report Provided By forecast.weather.gov