Hazard Report Provided By forecast.weather.gov

Hazardous Weather Outlook
National Weather Service Chicago/Romeoville IL
315 PM CDT Sun Aug 9 2026

ILZ003>006-008-010>013-019>021-023-032-033-039-103>108-INZ001-002-
010-011-019-102015-
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-
315 PM CDT Sun Aug 9 2026 /415 PM EDT Sun Aug 9 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 2 of 5 Damaging Wind Risk...up to 60 mph.
     Level 2 of 5 Large Hail Risk...up to quarter size.
  Elevated Flooding Risk.

DISCUSSION...

Showers and thunderstorms will be most prevalent across the near
south suburbs of Chicago and into northwest Indiana. A few of
these storms may produce instances of penny to quarter size hail,
wind gusts to 60 mph, and very heavy rain especially along and
north of Interstate 80 close to the lake shore.

Additional thunderstorms may develop later this evening, with the
potential to produce additional localized severe weather as well
as locally heavy rainfall which could lead to instances of flash
flooding.

.DAYS TWO THROUGH SEVEN...Monday through Saturday.

Monday...
  Elevated Flooding Risk.
  Significant Thunderstorm Risk...with an associated:
     Level 2 of 5 Severe Thunderstorm Risk.
  Limited Excessive Heat Risk.
Tuesday...
  Elevated Flooding Risk.
  Limited Thunderstorm Risk...with an associated:
     Level 2 of 5 Severe Thunderstorm Risk.
  Limited Excessive Heat Risk.
Wednesday...
  Limited Flooding Risk.
  Limited Thunderstorm Risk.
Thursday...
  Elevated Flooding Risk.
  Limited Thunderstorm Risk.
Friday and Saturday...
  Limited Thunderstorm Risk.

DISCUSSION...

Additional rounds of showers and thunderstorms are likely across
the region Monday through at least Wednesday, with a continued
threat of flash flooding and severe weather at times, especially
Monday into Tuesday.

.SPOTTER INFORMATION STATEMENT...

  Spotters may be needed this afternoon.

GENERAL STORM MOTION OF THE DAY:

  Moving toward the east southeast at 40 to 45 mph.

$$

Hazard Report Provided By forecast.weather.gov