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

Flood Watch
National Weather Service Chicago IL
220 AM CDT Wed Jun 17 2026

ILZ006-012-013-019>021-023-032-033-039-103>108-INZ001-002-010-011-
019-171530-
/O.NEW.KLOT.FA.A.0007.260617T1500Z-260618T0200Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Lake IL-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-
Including the cities of DeMotte, Bradley, Lombard, Minooka, Gary,
Elgin, Oak Lawn, Beecher, Channahon, Marseilles, Lemont, Watseka,
Valparaiso, Merrillville, La Salle, Kankakee, Calumet City,
Paxton, Pontiac, Coal City, Bolingbrook, Oak Forest, Crete,
Evanston, Oxford, Cicero, Ottawa, Morocco, Plainfield, Wheaton,
Fairbury, Carol Stream, Plano, Morris, Gilman, Yorkville, Park
Forest, Palatine, Bourbonnais, Wilmington, Mundelein, Downers
Grove, Rensselaer, Mendota, Hammond, Des Plaines, Aurora, Gibson
City, Joliet, Orland Park, Fowler, Schaumburg, Portage, Chicago,
Streator, Mokena, Gurnee, Naperville, Northbrook, Roselawn,
Kentland, Oak Park, Buffalo Grove, Peotone, Waukegan, Chesterton,
Manhattan, La Grange, Dwight, and Oswego
220 AM CDT Wed Jun 17 2026 /320 AM EDT Wed Jun 17 2026/

...FLOOD WATCH IN EFFECT FROM 10 AM CDT /11 AM EDT/ THIS MORNING
THROUGH THIS EVENING...

* WHAT...Flash flooding caused by excessive rainfall is possible.

* WHERE...Portions of Illinois, including the following counties, in
  Illinois, Cook, DuPage, Will, Ford, Grundy, Iroquois, Kane,
  Kankakee, Kendall, La Salle, Lake IL, and Livingston. In Indiana
  this flood watch includes the Benton, Jasper, Lake IN, Newton and
  Porter Counties.

* WHEN...From 10 AM CDT this morning through this evening.

* IMPACTS...Creeks and streams may rise out of their banks.

* ADDITIONAL DETAILS...
  - Showers and thunderstorms are expected today. Rain may be
    heavy at times, with the strongest storms capable of
    torrential rainfall which could drop up to 2 inches of rain
    in just an hour`s time in the hardest hit areas. Soil
    moisture is already quite high and stream flows elevated, so
    heavy rainfall could quickly result in flash flooding of
    streams, creeks, low lying, and flood prone areas.
  - http://www.weather.gov/safety/flood

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Flood Watch for flash flooding means rapid-onset flooding is
possible, but not yet certain, based upon the latest forecasts.
Flash flooding is a dangerous situation. Persons with interests
along area rivers, creeks, and other waterways should monitor the
latest forecasts and be prepared to take action should flooding
develop.

&&

$$

- Izzi

Hazard Report Provided By forecast.weather.gov