Hazard Report Provided By forecast.weather.gov

Hazardous Weather Outlook
National Weather Service Chicago/Romeoville IL
344 AM CDT Tue Aug 11 2026

ILZ003>006-008-010>013-019>021-023-032-033-039-103>108-INZ001-002-
010-011-019-120845-
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-
344 AM CDT Tue Aug 11 2026 /444 AM EDT Tue Aug 11 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...

  Significant Thunderstorm Risk...with an associated:
     Level 1 of 5 Tornado Risk.
     Level 3 of 5 Damaging Wind Risk...up to 80 mph.
  Elevated Flooding Risk.

DISCUSSION...
Scattered thunderstorms early this morning will present a
localized risk of severe weather, primarily damaging winds. A
complex of thunderstorms may then move across the area from mid-
morning into early this afternoon. If this complex materializes,
it will likely be severe with damaging wind gusts as high as 80
mph. In addition, any of these thunderstorms will be capable of
producing torrential downpours which may lead to localized
flooding.

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

Wednesday and Thursday...
  Elevated Flooding Risk.
  Elevated Thunderstorm Risk...with an associated:
     Level 1 of 5 Severe Thunderstorm Risk.
Friday...
  Elevated Flooding Risk.
  Limited Thunderstorm Risk.
Saturday...
  Limited Flooding Risk.
  Limited Thunderstorm Risk.
Sunday...
  Limited Thunderstorm Risk.

DISCUSSION...

An active and potentially stormy weather pattern will persist
through the end of the week, with additional rounds of
thunderstorms possible and an attendant risk of severe weather
and flash flooding.

.SPOTTER INFORMATION STATEMENT...

  Spotters will likely be needed this morning through mid-
  afternoon.


GENERAL STORM MOTION OF THE DAY:

  Moving toward the east-southeast at 30 to 40 mph. If a bowing
  complex develops, it could move east at 50 to 65 mph.

$$

Severe Weather Statement
National Weather Service Chicago/Romeoville
945 AM CDT Tue Aug 11 2026

INC073-089-127-111530-
/O.CON.KLOT.SV.W.0239.000000T0000Z-260811T1530Z/
Porter IN-Lake IN-Jasper IN-
945 AM CDT Tue Aug 11 2026

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1030 AM CDT
FOR PORTER...SOUTHEASTERN LAKE AND NORTHERN JASPER COUNTIES...

At 945 AM CDT, severe thunderstorms were located along a line
extending from near Winfield to Wheatfield, moving east at 20 mph.

HAZARD...60 mph wind gusts and quarter size hail.

SOURCE...Radar indicated.

IMPACT...Hail damage to vehicles is expected. Expect wind damage to
         roofs, siding, and trees.

Locations impacted include...
Portage, Merrillville, Valparaiso, Hobart, Crown Point, Chesterton,
DeMotte, Hebron, Wheatfield, Lakes of the Four Seasons, South Haven,
Porter, Winfield, Kouts, Burns Harbor, Wheeler, Boone Grove,
Stoutsburg, Dunns Bridge, and Malden.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 4119 8723 4122 8726 4130 8738 4147 8739
      4153 8731 4166 8693 4107 8693
TIME...MOT...LOC 1445Z 282DEG 19KT 4138 8729 4120 8705

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

Birk

Severe Weather Statement
National Weather Service Chicago/Romeoville
945 AM CDT Tue Aug 11 2026

INC073-089-127-111530-
/O.CON.KLOT.SV.W.0239.000000T0000Z-260811T1530Z/
Porter IN-Lake IN-Jasper IN-
945 AM CDT Tue Aug 11 2026

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1030 AM CDT
FOR PORTER...SOUTHEASTERN LAKE AND NORTHERN JASPER COUNTIES...

At 945 AM CDT, severe thunderstorms were located along a line
extending from near Winfield to Wheatfield, moving east at 20 mph.

HAZARD...60 mph wind gusts and quarter size hail.

SOURCE...Radar indicated.

IMPACT...Hail damage to vehicles is expected. Expect wind damage to
         roofs, siding, and trees.

Locations impacted include...
Portage, Merrillville, Valparaiso, Hobart, Crown Point, Chesterton,
DeMotte, Hebron, Wheatfield, Lakes of the Four Seasons, South Haven,
Porter, Winfield, Kouts, Burns Harbor, Wheeler, Boone Grove,
Stoutsburg, Dunns Bridge, and Malden.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 4119 8723 4122 8726 4130 8738 4147 8739
      4153 8731 4166 8693 4107 8693
TIME...MOT...LOC 1445Z 282DEG 19KT 4138 8729 4120 8705

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

Birk

SEVERE THUNDERSTORM WATCH OUTLINE UPDATE FOR WS 563
NWS STORM PREDICTION CENTER NORMAN OK
720 AM CDT TUE AUG 11 2026

SEVERE THUNDERSTORM WATCH 563 IS IN EFFECT UNTIL 200 PM CDT
FOR THE FOLLOWING LOCATIONS

INC007-073-089-111-127-111900-
/O.NEW.KWNS.SV.A.0563.260811T1220Z-260811T1900Z/

IN
.    INDIANA COUNTIES INCLUDED ARE

BENTON               JASPER              LAKE
NEWTON               PORTER
$$

Hazard Report Provided By forecast.weather.gov