Hazard Report Provided By forecast.weather.gov

Hazardous Weather Outlook
National Weather Service Chicago/Romeoville IL
425 AM CDT Mon May 18 2026

ILZ003>006-008-010>013-019>021-023-032-033-039-103>108-INZ001-002-
010-011-019-190930-
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-
425 AM CDT Mon May 18 2026 /525 AM EDT Mon May 18 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...

  Limited 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.
  Limited Flooding Risk.

DISCUSSION...

A weakening line of showers and thunderstorms will move east
across the area this morning. While the threat of severe weather
is fairly low this morning, daytime heating will likely allow for
a few strong to severe storms to develop during the midday and
afternoon hours. At this time, the threat of severe weather would
appear to be greatest along and south of the I-80 corridor.
Damaging winds and large hail would be the main severe weather
threats.

Another line of thunderstorms is expected to approach the area
from Iowa again toward daybreak Tuesday.

.DAYS TWO THROUGH SEVEN...Tuesday through Sunday.

Tuesday...
  Limited Thunderstorm Risk...with an associated:
     Level 2 of 5 Severe Thunderstorm Risk.

.SPOTTER INFORMATION STATEMENT...

  Spotters may be needed this afternoon.

GENERAL STORM MOTION OF THE DAY:

  Moving toward the northeast at 30 to 35 mph.

$$

Hazard Report Provided By forecast.weather.gov