Hazard Report Provided By forecast.weather.gov

Hydrologic Outlook
ILC007-031-037-043-053-063-075-089-091-093-097-099-103-105-111-141-
197-201-INC007-073-089-111-127-170800-

Hydrologic Outlook
National Weather Service Chicago IL
213 PM CDT Tue Jun 16 2026

...HEAVY RAINFALL MAY LEAD TO FLOODING WEDNESDAY...

Period of showers and thunderstorms are expected Wednesday.
Thunderstorms will be very efficient at producing torrential
rainfall, with some areas likely receiving up 2 inches of rain in
just an hour. Rainfall that intense would likely result in flash
flooding.

In addition, localized rainfall totals in excess of 3 inches are
possible across northern and central Illinois and northwest
Indiana through the day Wednesday, which could result in
significant rises and possible flooding on area streams and
rivers.

Recent heavy rainfall has left streamflow above average in many
areas and grounds still saturated. This will further increase the
threat of flooding.

Anyone in or near flood prone areas should closely monitor later
forecasts.
$$

Doom

Hazardous Weather Outlook
National Weather Service Chicago/Romeoville IL
224 PM CDT Tue Jun 16 2026

ILZ003>006-008-010>013-019>021-023-032-033-039-103>108-INZ001-002-
010-011-019-171930-
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-
224 PM CDT Tue Jun 16 2026 /324 PM EDT Tue Jun 16 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...

  Limited Thunderstorm Risk...with an associated:
     Level 1 of 5 Damaging Wind Risk...up to 60 mph.
     Level 1 of 5 Large Hail Risk...up to half dollar size.

DISCUSSION...

There is a slight chance for a couple of thunderstorms to develop
along a cold front through late afternoon east of I-57 but
primarily over northwestern Indiana. If storms were to occur, they
could possibly feature some hail and gusty winds.

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

Wednesday...
  Significant Thunderstorm Risk...with an associated:
     Level 4 of 5 Severe Thunderstorm Risk.
  Elevated Flooding Risk.
  High Swim Risk Illinois Lake Michigan Beaches.
Thursday Morning...
  High Swim Risk Indiana Lake Michigan Beaches.
Saturday and Sunday...
  Limited Thunderstorm Risk.

DISCUSSION...

A couple of waves of showers and thunderstorms can be expected
during the day tomorrow with severe thunderstorms possible during
the morning and likely in the afternoon. These storms will be
capable of producing all severe hazards including large hail,
destructive wind gusts, and tornadoes, some strong and long-
tracked. Periods of heavy to torrential rainfall may also
lead to instances of flash flooding.

.SPOTTER INFORMATION STATEMENT...

  Spotters may be needed late this afternoon east of I-57, as well
  as Wednesday afternoon.

GENERAL STORM MOTION OF THE DAY:

  Moving toward the east at 35 mph.

$$

Coastal Hazard Message
National Weather Service Chicago IL
219 PM CDT Tue Jun 16 2026

ILZ006-103-104-170330-
/O.NEW.KLOT.BH.S.0005.260617T1800Z-260618T1200Z/
Lake IL-Northern Cook-Central Cook-
219 PM CDT Tue Jun 16 2026

...BEACH HAZARDS STATEMENT IN EFFECT FROM WEDNESDAY AFTERNOON
THROUGH THURSDAY MORNING...

* WHAT...High wave action and dangerous currents expected at
  Illinois Lake Michigan beaches. Waves 4 to 6 ft expected.

* WHERE...Lake IL, Northern Cook and Central Cook Counties.

* WHEN...From Wednesday afternoon through Thursday morning.

* IMPACTS...Swimming conditions will be life threatening,
  especially for inexperienced swimmers. For information on swim
  advisories or bans at Chicago beaches: www. cpdbeaches. com.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Remain out of the water to avoid dangerous swimming conditions
and do not venture out onto piers, jetties, breakwalls, or other
shoreline structures.

&&

$$

Hazard Report Provided By forecast.weather.gov