One product issued by NWS for: Oakbrook Terrace IL
Hazardous Weather Outlook
Hazardous Weather Outlook
National Weather Service Chicago/Romeoville IL
1229 PM CDT Wed Aug 19 2026
ILZ003>006-008-010>013-019>021-023-032-033-039-103>108-INZ001-002-
010-011-019-201730-
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-
1229 PM CDT Wed Aug 19 2026 /129 PM EDT Wed Aug 19 2026/
This Hazardous Weather Outlook is for portions of north central
Illinois...northeast Illinois and northwest Indiana.
.DAY ONE...This Afternoon and Tonight.
Weather hazards expected...
Elevated 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 1 inch in diameter.
Elevated Flooding Risk.
DISCUSSION...
Thunderstorms are likely this afternoon south of I-80. Any storms
that develop will be capable of producing torrential rainfall
which could result in a localized flash flood threat. In
addition, a couple of isolated severe thunderstorms could pose a
threat of locally damaging winds and or large hail.
.DAYS TWO THROUGH SEVEN...Thursday through Tuesday.
Friday and Saturday...
Limited Thunderstorm Risk.
.SPOTTER INFORMATION STATEMENT...
Spotters may be needed this afternoon and evening south of I-80.
GENERAL STORM MOTION OF THE DAY:
Moving toward the east at around 20 mph.
$$