Hazardous Weather Outlook for Berwyn, Illinois
Hazardous Weather Outlook
National Weather Service Chicago/Romeoville IL
844 PM CDT Thu Jul 3 2025
ILZ003>006-008-010>013-019>021-023-032-033-039-103>108-INZ001-002-
010-011-019-050000-
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-
844 PM CDT Thu Jul 3 2025 /944 PM EDT Thu Jul 3 2025/
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 late tonight, mainly north of I-90.
DISCUSSION...
Storms are possible across far northern IL late tonight, mainly
north of Interstate 90.
.DAYS TWO THROUGH SEVEN...Friday through Wednesday.
Friday Morning...
Limited Thunderstorm Risk.
Friday Afternoon through Saturday...
Limited Excessive Heat Risk.
Saturday Night...
Limited Thunderstorm Risk.
Sunday...
Limited Thunderstorm Risk.
Limited Flooding Risk.
Tuesday and Wednesday...
Limited Thunderstorm Risk.
DISCUSSION...
Heat indices of 95 to 100 degrees are expected Friday and
Saturday. Shower and thunderstorm chances will increase Saturday
night and Sunday.
.SPOTTER INFORMATION STATEMENT...
Spotters activation is unlikely through tonight.
GENERAL STORM MOTION OF THE DAY:
Moving toward the southeast around 20 mph.
Air Quality Alert for Berwyn, Illinois
ILZ005-006-012-013-020-021-103>108-050400-
McHenry-Lake IL-Kane-DuPage-Kendall-Grundy-Northern Cook-
Central Cook-Southern Cook-Northern Will-Southern Will-Eastern Will-
Including the cities of Crystal Lake, Algonquin, McHenry, Woodstock,
Waukegan, Buffalo Grove, Mundelein, Gurnee, Aurora, Elgin,
Naperville, Wheaton, Downers Grove, Lombard, Carol Stream, Oswego,
Yorkville, Plano, Morris, Coal City, Minooka, Evanston, Des Plaines,
Schaumburg, Palatine, Northbrook, Chicago, Cicero, Oak Lawn,
Oak Park, La Grange, Calumet City, Oak Forest, Lemont, Orland Park,
Park Forest, Joliet, Bolingbrook, Plainfield, Mokena, Channahon,
Manhattan, Wilmington, Crete, Peotone, and Beecher
1110 AM CDT Thu Jul 3 2025
...AIR QUALITY ALERT IN EFFECT THROUGH FRIDAY NIGHT...
The Illinois Environmental Protection Agency has determined that an
Air Pollution Action Day will be declared for the greater Chicago
Metropolitan Area and is IN EFFECT THROUGH FRIDAY NIGHT.
An Air Pollution Action Day is declared when weather conditions are
such that widespread ozone and or particulate levels are expected to
be at or above the Unhealthy for Sensitive Groups category of the
Air Quality Index for multiple days. Ozone is expected to be the
primary pollutant of concern, but fireworks emissions may also
contribute to higher AQI readings for both PM2.5 and Ozone at times.
Active children and adults, especially people with pulmonary or
respiratory disease such as asthma, should limit prolonged outdoor
activity.
Area residents are urged to reduce pollution levels. Air quality
forecasts, current air quality, and tips on how you can reduce your
emissions can be found at www.airnow.gov.
Media contact...Illinois EPA.