Hazard Report Provided By forecast.weather.gov

Hazardous Weather Outlook
National Weather Service Chicago/Romeoville IL
416 PM CDT Tue Aug 11 2026

ILZ003>006-008-010>013-019>021-023-032-033-039-103>108-INZ001-002-
010-011-019-122130-
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-
416 PM CDT Tue Aug 11 2026 /516 PM EDT Tue Aug 11 2026/

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

.DAY ONE...Tonight.

Weather hazards expected...

  Elevated Thunderstorm Risk...with an associated:
     Level 1 of 5 Damaging Wind Risk...up to 65 mph.
     Level 1 of 5 Large Hail Risk...up to half dollar size.
  Elevated Flooding Risk.

DISCUSSION...

Isolated non-severe thunderstorms may develop late this afternoon
through mid evening. Primary hazards include occasional lightning
strikes and localized downpours.

Scattered thunderstorms are expected late this evening and
overnight. Some of these thunderstorms may become severe with
localized damaging winds and large hail. Heavy rain and localized
flash flooding will also be possible.

.DAYS TWO THROUGH SEVEN...Wednesday through Monday.

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

DISCUSSION...

Several rounds of thunderstorms are expected through the end of
this week. Strong to severe thunderstorms will be possible at
times. Heavy rain and localized flash flooding will also be
possible at times.

.SPOTTER INFORMATION STATEMENT...

Spotters may be needed later this evening and overnight.

GENERAL STORM MOTION OF THE DAY:

Moving toward the southeast at 30 to 40 mph.

$$

Hazard Report Provided By forecast.weather.gov