Hazard Report Provided By forecast.weather.gov

Hazardous Weather Outlook
National Weather Service Chicago/Romeoville IL
301 PM CDT Tue Mar 10 2026

ILZ003>006-008-010>013-019>021-023-032-033-039-103>108-INZ001-002-
010-011-019-112015-
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-
301 PM CDT Tue Mar 10 2026 /401 PM EDT Tue Mar 10 2026/

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

.DAY ONE...Tonight.

Weather hazards expected...

  Significant Thunderstorm Risk...with an associated:
     Level 4 of 5 Tornado Risk mainly near/south of I-80.
     Level 3 of 5 Large Hail Risk...up to 2 inches in diameter.
     Level 2 of 5 Damaging Wind Risk...up to 70 mph.
  Elevated Flooding Risk.

DISCUSSION...

Severe thunderstorms will develop late this afternoon through
this evening, as a surface front resides along or just south of
the Interstate 80 corridor. The threat for large damaging hail,
damaging winds, and strong tornadoes exists along and south of
this front. Meanwhile, areas north of the front have the threat
for large damaging hail and localized damaging winds. The severe
weather threat may continue through tonight, particularly south of
I-80.

Locally heavy rainfall will also accompany these storms through
early Wednesday morning, and this may lead to localized flash
flooding.


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

Wednesday morning...
  Limited Thunderstorm Risk east of I-57 and south of I-80.
Thursday night and Friday...
 Elevated Non Thunderstorm Wind Risk.

DISCUSSION...

A period of strong winds, potentially gusting over 45 mph, is
possible Thursday night into Friday.

.SPOTTER INFORMATION STATEMENT...

  Spotters will likely be needed this evening.

GENERAL STORM MOTION OF THE DAY:

  Moving toward the east at 30 to 40 mph.

$$

WATCH COUNTY NOTIFICATION FOR WATCHES 32/35
NATIONAL WEATHER SERVICE CHICAGO IL
632 PM CDT TUE MAR 10 2026

INC089-127-110400-
/O.CAN.KLOT.SV.A.0035.000000T0000Z-260311T0500Z/
/O.EXA.KLOT.TO.A.0032.000000T0000Z-260311T0400Z/

THE NATIONAL WEATHER SERVICE HAS ISSUED TORNADO WATCH 32 UNTIL
11 PM CDT THIS EVENING WHICH REPLACES A PORTION OF SEVERE
THUNDERSTORM WATCH 35. THE NEW WATCH IS VALID FOR THE FOLLOWING
AREAS

IN INDIANA THE NEW WATCH INCLUDES 2 COUNTIES

IN NORTHWEST INDIANA

LAKE IN               PORTER

THIS INCLUDES THE CITIES OF CHESTERTON, GARY, HAMMOND,
MERRILLVILLE, PORTAGE, AND VALPARAISO.

$$

Flood Watch
National Weather Service Chicago IL
1204 PM CDT Tue Mar 10 2026

ILZ012-013-019>021-023-103>108-INZ001-002-110800-
/O.NEW.KLOT.FA.A.0001.260310T1900Z-260311T0800Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Kane-DuPage-La Salle-Kendall-Grundy-Kankakee-Northern Cook-
Central Cook-Southern Cook-Northern Will-Southern Will-Eastern
Will-Lake IN-Porter-
Including the cities of Mokena, Ottawa, Lemont, Lombard, Des
Plaines, Oak Forest, Bolingbrook, Orland Park, Oswego,
Naperville, Merrillville, Portage, Palatine, Bourbonnais,
Beecher, Aurora, Joliet, Bradley, Northbrook, Oak Park, Plano,
Calumet City, Manhattan, Carol Stream, Downers Grove, Gary,
Valparaiso, Peotone, Chicago, Oak Lawn, Crete, La Salle,
Chesterton, Coal City, Schaumburg, Wheaton, Kankakee, Plainfield,
La Grange, Cicero, Yorkville, Park Forest, Mendota, Streator,
Minooka, Morris, Evanston, Hammond, Wilmington, Marseilles,
Elgin, and Channahon
1204 PM CDT Tue Mar 10 2026

...FLOOD WATCH IN EFFECT FROM EARLY THIS AFTERNOON THROUGH LATE
TONIGHT...

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

* WHERE...Portions of Illinois, including the following areas,
  Central Cook, DuPage, Eastern Will, Grundy, Kane, Kankakee,
  Kendall, La Salle, Northern Cook, Northern Will, Southern Cook and
  Southern Will and northwest Indiana, including the following
  areas, Lake IN and Porter.

* WHEN...Through late tonight.

* IMPACTS...Creeks and streams may rise out of their banks. Flooding
  may occur in poor drainage and urban areas. Underpasses may be
  flooded. Roads and streets may be flooded.

* ADDITIONAL DETAILS...
  - Multiple rounds of showers and thunderstorms with rainfall
    rates up to 1 to 2 inches per hour will be possible from late
    this afternoon until late this evening. The highest chance
    for flooding will be in urban areas and locations that
    received heavy rainfall over the last several days.
  - 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.

&&

$$

WSL/Doom

Hazard Report Provided By forecast.weather.gov