Hazard Report Provided By forecast.weather.gov

Hazardous Weather Outlook
National Weather Service Chicago/Romeoville IL
344 AM CDT Tue Aug 11 2026

ILZ003>006-008-010>013-019>021-023-032-033-039-103>108-INZ001-002-
010-011-019-120845-
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-
344 AM CDT Tue Aug 11 2026 /444 AM EDT Tue Aug 11 2026/

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

.DAY ONE...Today and Tonight.

Weather hazards expected...

  Significant Thunderstorm Risk...with an associated:
     Level 1 of 5 Tornado Risk.
     Level 3 of 5 Damaging Wind Risk...up to 80 mph.
  Elevated Flooding Risk.

DISCUSSION...
Scattered thunderstorms early this morning will present a
localized risk of severe weather, primarily damaging winds. A
complex of thunderstorms may then move across the area from mid-
morning into early this afternoon. If this complex materializes,
it will likely be severe with damaging wind gusts as high as 80
mph. In addition, any of these thunderstorms will be capable of
producing torrential downpours which may lead to localized
flooding.

.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...

An active and potentially stormy weather pattern will persist
through the end of the week, with additional rounds of
thunderstorms possible and an attendant risk of severe weather
and flash flooding.

.SPOTTER INFORMATION STATEMENT...

  Spotters will likely be needed this morning through mid-
  afternoon.


GENERAL STORM MOTION OF THE DAY:

  Moving toward the east-southeast at 30 to 40 mph. If a bowing
  complex develops, it could move east at 50 to 65 mph.

$$

Hazard Report Provided By forecast.weather.gov