Hazardous Weather Outlook

National Weather Service Chicago IL

326 PM CDT Thu Oct 15 2026

ILZ003>006-008-010>013-019>021-023-032-033-039-103>108-INZ001-002-

010-011-019-162030-

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-

326 PM CDT Thu Oct 15 2026 /426 PM EDT Thu Oct 15 2026/

This Hazardous Weather Outlook is for portions of central

Illinois, east central Illinois, north central Illinois,

northeast Illinois, and northwest Indiana.

DAY ONE - Tonight

Weather hazards expected...

Limited Thunderstorm Risk.

DISCUSSION

A few thunderstorms may develop between 5 and 9 PM near and east

of the Interstate 55 corridor. There is a non-zero but very low

(less than 5 percent) chance for severe weather.

DAYS TWO THROUGH SEVEN - Friday through Wednesday

Friday...

Limited Thunderstorm Risk near Lake Michigan.

Friday night into Saturday morning...

Significant Frost and Limited Freeze Risk mainly in Illinois.

Saturday night into Friday morning...

Limited Frost risk mainly east of Interstate 55.

SPOTTER INFORMATION STATEMENT -

Spotter activation is not anticipated at this time.

GENERAL STORM MOTION OF THE DAY

Moving toward the east at 55 mph.

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