Hazard Report Provided By forecast.weather.gov

Hazardous Weather Outlook
National Weather Service Chicago/Romeoville IL
1018 AM CDT Sun Jun 21 2026

ILZ003>006-008-010>013-019>021-023-032-033-039-103>108-INZ001-002-
010-011-019-221530-
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-
1018 AM CDT Sun Jun 21 2026 /1118 AM EDT Sun Jun 21 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 south of I-80...with an associated:
     Level 1 of 5 Damaging Wind Risk...up to 60 mph.
  Elevated Flooding Risk.
  High Swim Risk Lake Michigan Beaches tonight.

DISCUSSION...

Widespread soaking rainfall with localized corridors of
torrential rainfall may lead to flooding in some areas today. The
greatest likelihood of flooding is present near and south of I-88.

A few thunderstorms may also occur, especially well south of I-
80, where there is also a conditional threat for a few severe
storms south of a Pontiac, IL to Rensselaer, IN line.

Strengthening onshore winds will cause the threat for rip
currents at southern Lake Michigan beaches to ramp this evening
and continue through tonight.

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

Monday...
  High Swim Risk Lake Michigan Beaches.
Tuesday night through Saturday...
  Limited Thunderstorm Risk.

DISCUSSION...

An elevated danger for rip currents at southern Lake Michigan
beaches will continue into Monday.

Periodic thunderstorm chances are currently forecasted Tuesday
night through Saturday.

.SPOTTER INFORMATION STATEMENT...

  Spotters may be needed well south of I-80 this afternoon and
  evening.

GENERAL STORM MOTION OF THE DAY:

  Moving toward the east at 30 to 40 mph.

$$

Hydrologic Outlook
ILC031-037-043-053-063-075-089-091-093-099-103-105-197-INC007-073-
089-111-127-211800-

Hydrologic Outlook
National Weather Service Chicago IL
359 AM CDT Sun Jun 21 2026

...SOAKING RAINFALL MAY LEAD TO FLOODING THIS AFTERNOON
AND EVENING...

A steady soaking rain is expected this afternoon and evening. The
highest rainfall amounts are forecast generally south of I-88 where
totals in excess of 1 to 2 inches are possible.

Many rivers and streams across the region remain elevated from
recent heavy rainfall. Thus, rainfall amounts of this magnitude will
result in renewed rises on area streams and rivers, with some
potentially topping flood stage.

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

This will be the final outlook for this event.
$$

Birk

Hazard Report Provided By forecast.weather.gov