Hazard Report Provided By forecast.weather.gov

Hazardous Weather Outlook...UPDATED
National Weather Service Chicago/Romeoville IL
813 PM CDT Thu Jun 4 2026

ILZ003>006-008-010>013-019>021-023-032-033-039-103>108-INZ001-002-
010-011-019-060115-
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-
813 PM CDT Thu Jun 4 2026 /913 PM EDT Thu Jun 4 2026/

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

.DAY ONE...Tonight.

Weather hazards expected...

  Limited Thunderstorm Risk.

DISCUSSION...

There is a chance of thunderstorms toward dawn, especially in the
I-39 corridor. Severe weather is not expected.

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

Friday...
  Elevated Flooding Risk.
  Limited Thunderstorm Risk...with an associated:
     Level 1 of 5 Severe Thunderstorm Risk.
Saturday...
  Limited Flooding Risk.
  Limited Thunderstorm Risk...with an associated:
     Level 1 of 5 Severe Thunderstorm Risk.
Sunday and Monday...
  Limited Flooding Risk.
  Limited Thunderstorm Risk.
Tuesday...
  Limited Thunderstorm Risk.
Wednesday...
  Limited Thunderstorm Risk.
  Limited Excessive Heat Risk.

DISCUSSION...

Showers and widely scattered storms are possible on Friday and
Friday night. The strongest storms may produce locally heavy
rainfall and isolated damaging wind gusts.

Off-and-on shower and storm chances will continue into early next
week.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will not be necessary through tonight.

GENERAL STORM MOTION OF THE DAY:

Moving toward the east northeast around 30 mph.

$$

INZ001-002-010-011-019-050500-
Lake IN-Porter-Newton-Jasper-Benton-
Including the cities of Gary, Hammond, Merrillville, Portage,
Valparaiso, Chesterton, Roselawn, Kentland, Morocco, Rensselaer,
DeMotte, Fowler, and Oxford
956 AM CDT Thu Jun 4 2026 /1056 AM EDT Thu Jun 4 2026/

...AIR QUALITY ALERT IN EFFECT UNTIL MIDNIGHT CDT TONIGHT...

The officials at the Indiana Department of Environmental Management
have declared an Air Quality Action Day, IN EFFECT UNTIL MIDNIGHT
CDT TONIGHT.

An Air Quality Action Day for Ozone has been issued. Ozone levels
are expected to be in the Unhealthy for Sensitive Groups range.
Active children and adults, and people with respiratory disease,
such as asthma should limit prolonged outdoor exposure.

Here are some recommended actions that the public can take:

* Walk, bike, carpool or use public transportation.
* Avoid using the drive-through and combine errands into one trip.
* Avoid refueling your vehicle or using gasoline-powered lawn
  equipment until after 7pm.
* Turn off your engine when idling for more than 30 seconds.
* Conserve energy by turning off lights or setting the air
  conditioner to 75 degrees or above.

For additional information, please visit the IDEM Smog page at:

http://www.in.gov/idem/airmonitoring/smogwatch/

$$

Hazard Report Provided By forecast.weather.gov