Hazard Report Provided By forecast.weather.gov

Hazardous Weather Outlook
National Weather Service Chicago/Romeoville IL
311 PM CDT Thu Jun 11 2026

ILZ003>006-008-010>013-019>021-023-032-033-039-103>108-INZ001-002-
010-011-019-122015-
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-
311 PM CDT Thu Jun 11 2026 /411 PM EDT Thu Jun 11 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 4 of 5 Damaging Wind Risk...up to 80 mph.
     Level 3 of 5 Tornado Risk.
     Level 2 of 5 Isolated Large Hail Risk...up to 2 inches in diameter.
  Elevated Flooding Risk.
  Elevated Non Thunderstorm Wind Risk.

DISCUSSION...

Severe thunderstorms will continue to develop in advance of an
approaching cold front this afternoon. These storms are expected
to move across the area through 10 PM this evening, and will be
capable of producing tornadoes and destructive winds, some
possibly significant. Instances of flash flooding may also occur
where thunderstorms repeatedly hit the same area.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday.

Saturday...
  Limited Thunderstorm Risk...with an associated:
     Level 1 of 5 Severe Thunderstorm Risk.
  Limited Flooding Risk.
Tuesday and Wednesday...
  Limited Thunderstorm Risk.


.SPOTTER INFORMATION STATEMENT...

  Spotters will be needed through this evening.

GENERAL STORM MOTION OF THE DAY:

  Moving toward the east at around 45 mph.


$$

URGENT - WEATHER MESSAGE
National Weather Service Chicago IL
300 PM CDT Thu Jun 11 2026

ILZ012-013-020-021-103>107-112100-
/O.NEW.KLOT.HW.W.0004.260611T2000Z-260611T2100Z/
Kane-DuPage-Kendall-Grundy-Northern Cook-Central Cook-Southern
Cook-Northern Will-Southern Will-
Including the cities of Northbrook, Cicero, Bolingbrook, Chicago,
Plainfield, Mokena, Joliet, Plano, Aurora, Evanston, Oak Lawn,
Wilmington, Schaumburg, Minooka, Calumet City, Downers Grove,
Elgin, Morris, Park Forest, Coal City, Wheaton, Lemont, La
Grange, Lombard, Oswego, Palatine, Oak Park, Channahon, Orland
Park, Yorkville, Oak Forest, Manhattan, Carol Stream, Naperville,
and Des Plaines
300 PM CDT Thu Jun 11 2026

...HIGH WIND WARNING IN EFFECT UNTIL 4 PM CDT THIS AFTERNOON...

* WHAT...A brief period of damaging winds up to 60 mph.

* WHERE...Central Cook, DuPage, Grundy, Kane, Kendall, Northern
  Cook, Northern Will, Southern Cook, and Southern Will Counties.

* WHEN...Until 4 PM CDT this afternoon.

* IMPACTS...Damaging winds will blow down trees and power lines.
  Widespread power outages are expected. Travel will be difficult,
  especially for high profile vehicles.

* ADDITIONAL DETAILS...Strong and damaging winds associated with
  dissipating thunderstorms will result in brief period of locally
  strong winds up to 60 mph.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Remain in the lower levels of your home during the windstorm, and
avoid windows. Watch for falling debris and tree limbs. Use caution
if you must drive.

&&

$$

- Izzi

TORNADO WATCH OUTLINE UPDATE FOR WT 313
NWS STORM PREDICTION CENTER NORMAN OK
155 PM CDT THU JUN 11 2026

TORNADO WATCH 313 IS IN EFFECT UNTIL 900 PM CDT FOR THE
 FOLLOWING LOCATIONS

ILC001-007-009-011-015-017-031-037-039-043-053-057-063-067-071-
073-075-085-089-091-093-095-097-099-103-105-107-109-111-113-123-
125-129-131-137-141-143-149-155-161-167-169-171-175-177-179-187-
195-197-201-203-120200-
/O.NEW.KWNS.TO.A.0313.260611T1855Z-260612T0200Z/

IL
.    ILLINOIS COUNTIES INCLUDED ARE

ADAMS                BOONE               BROWN
BUREAU               CARROLL             CASS
COOK                 DE KALB             DE WITT
DUPAGE               FORD                FULTON
GRUNDY               HANCOCK             HENDERSON
HENRY                IROQUOIS            JO DAVIESS
KANE                 KANKAKEE            KENDALL
KNOX                 LAKE                LA SALLE
LEE                  LIVINGSTON          LOGAN
MARSHALL             MASON               MCDONOUGH
MCHENRY              MCLEAN              MENARD
MERCER               MORGAN              OGLE
PEORIA               PIKE                PUTNAM
ROCK ISLAND          SANGAMON            SCHUYLER
SCOTT                STARK               STEPHENSON
TAZEWELL             WARREN              WHITESIDE
WILL                 WINNEBAGO           WOODFORD
$$

Flood Watch
National Weather Service Chicago IL
1239 PM CDT Thu Jun 11 2026

ILZ003>006-008-010>013-019>021-023-032-103>108-INZ001-002-120400-
/O.CON.KLOT.FA.A.0006.000000T0000Z-260612T0400Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Winnebago-Boone-McHenry-Lake IL-Ogle-Lee-De Kalb-Kane-DuPage-La
Salle-Kendall-Grundy-Kankakee-Livingston-Northern Cook-Central
Cook-Southern Cook-Northern Will-Southern Will-Eastern Will-Lake
IN-Porter-
Including the cities of Coal City, Oak Lawn, Gary, Evanston,
Calumet City, Crystal Lake, Wheaton, Streator, Mokena, Orland
Park, Beecher, Belvidere, Pontiac, Crete, Park Forest, Yorkville,
Oregon, Elgin, Schaumburg, Waukegan, Joliet, Bradley, Aurora,
Morris, McHenry, Minooka, Plano, Buffalo Grove, Dwight, Cicero,
Wilmington, Oak Park, Chesterton, La Grange, Rochelle, Portage,
Ottawa, Dixon, Marseilles, Lombard, Des Plaines, La Salle,
Palatine, Hammond, Naperville, Algonquin, Mendota, Bourbonnais,
Merrillville, Lemont, Chicago, Valparaiso, Rockford, Oswego,
Kankakee, DeKalb, Channahon, Fairbury, Bolingbrook, Gurnee,
Woodstock, Plainfield, Manhattan, Mundelein, Carol Stream, Byron,
Sycamore, Downers Grove, Peotone, Northbrook, and Oak Forest
1239 PM CDT Thu Jun 11 2026

...FLOOD WATCH REMAINS IN EFFECT UNTIL 11 PM CDT THIS EVENING...

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

* WHERE...Portions of Illinois, including the following areas,
  Boone, Central Cook, De Kalb, DuPage, Eastern Will, Grundy, Kane,
  Kankakee, Kendall, La Salle, Lake IL, Lee, Livingston, McHenry,
  Northern Cook, Northern Will, Ogle, Southern Cook, Southern Will
  and Winnebago and northwest Indiana, including the following
  areas, Lake IN and Porter.

* WHEN...Until 11 PM CDT this evening.

* 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 heavy showers and thunderstorms are
    possible this afternoon and evening, with rain rates up to 1
    to 3 inches per hour. The most likely areas for flooding
    include urban areas and locations and received heavy rainfall
    over the last few 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

Hazard Report Provided By forecast.weather.gov