Hazard Report Provided By forecast.weather.gov

Hazardous Weather Outlook
National Weather Service Chicago/Romeoville IL
218 PM CDT Mon Jul 27 2026

ILZ003>006-008-010>013-019>021-023-032-033-039-103>108-INZ001-002-
010-011-019-281930-
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-
218 PM CDT Mon Jul 27 2026 /318 PM EDT Mon Jul 27 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 Tornado Risk.
     Level 3 of 5 Damaging Wind Risk...up to 70 mph.
     Level 2 of 5 Large Hail Risk...up to golf ball size.
  Elevated Flooding Risk.
  Significant Excessive Heat Risk.
  High Swim Risk Lake Michigan Beaches late tonight.

DISCUSSION...

Periods of thunderstorms are expected this afternoon and evening.
Any storms that develop may become severe and feature damaging to
destructive wind gusts, large hail, and localized flash flooding.

Outside of areas impacted by afternoon thunderstorms, dangerous
heat and humidity will continue through the remainder of this
afternoon.

Gusty northerly winds will lead to high waves and dangerous
swimming conditions at Lake Michigan beaches late tonight through
Wednesday morning.

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

Tuesday...
  High Swim Risk Lake Michigan Beaches.
Friday...
  Elevated Flooding Risk.
  Limited Thunderstorm Risk.
Saturday and Sunday...
  Limited Thunderstorm Risk.

.SPOTTER INFORMATION STATEMENT...

  Spotters may be needed this afternoon and evening.

GENERAL STORM MOTION OF THE DAY:

  Moving toward the southeast at 40 mph.

$$

Coastal Hazard Message
National Weather Service Chicago IL
444 PM CDT Mon Jul 27 2026

ILZ006-103-104-INZ001-002-280545-
/O.EXT.KLOT.BH.S.0009.260727T2144Z-260729T1500Z/
Lake IL-Northern Cook-Central Cook-Lake IN-Porter-
444 PM CDT Mon Jul 27 2026

...BEACH HAZARDS STATEMENT NOW IN EFFECT THROUGH WEDNESDAY
MORNING...

* WHAT...Thunderstorm activity through late this afternoon will
  create varying currents, rapid water level fluctuations, and
  dangerous swimming conditions with waves 3 to 5 feet expected.
  Northerly winds will develop tonight and create high wave action
  and dangerous swimming conditions with waves 6 to 9 feet
  expected.

* WHERE...In Illinois, Lake, Northern Cook and Central Cook
  Counties. In Indiana, Lake and Porter Counties.

* WHEN...Through Wednesday 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