Hazard Report Provided By forecast.weather.gov

Hazardous Weather Outlook
National Weather Service Chicago/Romeoville IL
911 PM CDT Fri Aug 14 2026

ILZ003>006-008-010>013-019>021-023-032-033-039-103>108-INZ001-002-
010-011-019-160215-
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-
911 PM CDT Fri Aug 14 2026 /1011 PM EDT Fri Aug 14 2026/

This Hazardous Weather Outlook is for portions of north central
Illinois...northeast Illinois and northwest Indiana.

.DAY ONE...Tonight.

Weather hazards expected...

  Significant Flooding Risk, especially along and south of Interstate 80.
  Limited Thunderstorm Risk...with an associated:
     Level 1 of 5 Damaging Wind Risk...up to 60 mph.

DISCUSSION...

Another round of thunderstorms is expected tonight with the
highest coverage favored along and south of Interstate 80.
Torrential rain rates may lead to widespread flash flooding. In
addition, locally damaging winds cannot be ruled out.

.DAYS TWO THROUGH SEVEN...Saturday through Thursday.

Saturday...
  Significant Flooding Risk south of Interstate 80 in the morning.
  Limited Thunderstorm Risk...with an associated:
     Level 1 of 5 Severe Thunderstorm Risk.
Sunday...
  Limited Thunderstorm Risk...with an associated:
     Level 1 of 5 Severe Thunderstorm Risk.
Tuesday and Wednesday...
  Limited Flooding Risk.
  Limited Thunderstorm Risk.

DISCUSSION...

A strong to severe storm cannot be ruled out Saturday night into
early Sunday morning. Then, additional storms may occur during the
middle of next week.

.SPOTTER INFORMATION STATEMENT...

  Spotters may be needed tonight for flash flooding reports.

GENERAL STORM MOTION OF THE DAY:

  Moving toward the east at 30 mph.

$$

Flood Watch
National Weather Service Chicago IL
914 PM CDT Fri Aug 14 2026

ILZ008-010>013-020-103>106-151015-
/O.CON.KLOT.FA.A.0013.260815T0300Z-260815T1500Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Ogle-Lee-De Kalb-Kane-DuPage-Kendall-Northern Cook-Central Cook-
Southern Cook-Northern Will-
Including the cities of Naperville, Chicago, Oswego, Cicero,
Palatine, Des Plaines, Bolingbrook, Orland Park, Northbrook, Lombard,
Oak Forest, Mokena, Schaumburg, Plano, Oak Park, DeKalb, Sycamore,
Wheaton, Downers Grove, Rochelle, Oak Lawn, Calumet City, Byron,
Carol Stream, Aurora, Park Forest, La Grange, Plainfield, Yorkville,
Lemont, Elgin, Evanston, Joliet, Dixon, and Oregon
914 PM CDT Fri Aug 14 2026

...FLOOD WATCH REMAINS IN EFFECT THROUGH SATURDAY MORNING...

* WHAT...Flash flooding caused by excessive rainfall continues to be
  possible.

* WHERE...Portions of north central and northeast Illinois including
  Lee, Ogle, DeKalb, Kane, Kendall, DuPage, Cook, and northern Will
  counties.

* WHEN...Through Saturday morning.

* IMPACTS...Creeks and streams may rise out of their banks. Flooding
  may occur in poor drainage and urban areas, especially in the
  vicinity of storm drains that are clogged by leaf debris.
  Underpasses and viaducts may flood in urban areas, as well.

* ADDITIONAL DETAILS...
  - Another round of torrential rain-producing showers and storms is
    expected across the watch area tonight. Saturated soils and
    torrential downpours will set the stage for flash flooding.
  - http://www.weather.gov/safety/flood

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Monitor the latest forecasts. Have multiple ways to receive warning
information including at least one way that will wake you up.

&&

$$

Hazard Report Provided By forecast.weather.gov