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Home Return to list Severe Thunderstorm Warning 0253 Issued by the Chicago Forecast Office
Action: New Issued At: 2026-08-12 09:26:14
784
WUUS53 KLOT 121426
SVRLOT
ILC031-043-091-197-121545-
/O.NEW.KLOT.SV.W.0253.260812T1426Z-260812T1545Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Chicago/Romeoville
926 AM CDT Wed Aug 12 2026
The National Weather Service in Chicago has issued a
* Severe Thunderstorm Warning for...
Will County in northeastern Illinois...
Northern Kankakee County in northeastern Illinois...
DuPage County in northeastern Illinois...
Cook County in northeastern Illinois...
* Until 1045 AM CDT.
* At 925 AM CDT, a line of severe thunderstorms extended from
Hinckley to Morris to Mazon, and was moving east at 50 mph.
HAZARD...60 mph wind gusts.
SOURCE...Trained weather spotters. Wind gusts up to 60 mph were
reported in Grundy County with this storm.
IMPACT...Expect damage to roofs, siding, and trees.
* Locations impacted include...
Chicago, Aurora, Joliet, Naperville, Cicero, Evanston, Bolingbrook,
Skokie, Orland Park, Tinley Park, Oak Lawn, Berwyn, Wheaton, Oak
Park, Downers Grove, Elmhurst, Lombard, Ohare Airport, Carol
Stream, Romeoville, Plainfield, Park Ridge, Calumet City, Addison,
and Glendale Heights.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Remain alert for a possible tornado! Tornadoes can develop quickly
from severe thunderstorms. If you spot a tornado go at once into the
basement or small central room in a sturdy structure.
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4120 8824 4190 8826 4204 8767 4190 8762
4190 8760 4183 8760 4172 8753 4116 8753
TIME...MOT...LOC 1425Z 265DEG 44KT 4157 8845
TORNADO...POSSIBLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...OBSERVED
MAX WIND GUST...60 MPH
$$
Borchardt
Action: Continued Issued At: 2026-08-12 09:34:14
046
WWUS53 KLOT 121433
SVSLOT
Severe Weather Statement
National Weather Service Chicago/Romeoville
933 AM CDT Wed Aug 12 2026
ILC031-043-091-197-121545-
/O.CON.KLOT.SV.W.0253.000000T0000Z-260812T1545Z/
Will IL-Kankakee IL-DuPage IL-Cook IL-
933 AM CDT Wed Aug 12 2026
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1045 AM CDT
FOR WILL...NORTHERN KANKAKEE...DUPAGE AND COOK COUNTIES...
At 932 AM CDT, a line of severe thunderstorms extends from Maple
Park to Sugar Grove to Oswego to Morris, moving east at 50 mph.
HAZARD...70 mph wind gusts. The strongest winds are taking aim at
northern Will County including Plainfield, Crystal Lawns,
Lockport, Romeoville, and Bolingbrook.
SOURCE...Trained weather spotters.
IMPACT...Expect considerable tree damage. Damage is likely to mobile
homes, roofs, and outbuildings.
Locations impacted include...
Chicago, Aurora, Joliet, Naperville, Cicero, Evanston, Bolingbrook,
Skokie, Orland Park, Tinley Park, Oak Lawn, Berwyn, Wheaton, Oak
Park, Downers Grove, Elmhurst, Lombard, Ohare Airport, Carol Stream,
Romeoville, Plainfield, Park Ridge, Calumet City, Addison, and
Glendale Heights.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Remain alert for a possible tornado! Tornadoes can develop quickly
from severe thunderstorms. If you spot a tornado go at once into the
basement or small central room in a sturdy structure.
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4120 8824 4190 8826 4204 8767 4190 8762
4190 8760 4183 8760 4172 8753 4116 8753
TIME...MOT...LOC 1432Z 270DEG 44KT 4157 8832
TORNADO...POSSIBLE
THUNDERSTORM DAMAGE THREAT...CONSIDERABLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...OBSERVED
MAX WIND GUST...70 MPH
$$
Borchardt
Action: Continued Issued At: 2026-08-12 09:42:44
175
WWUS53 KLOT 121442
SVSLOT
Severe Weather Statement
National Weather Service Chicago/Romeoville
942 AM CDT Wed Aug 12 2026
ILC031-043-091-197-121545-
/O.CON.KLOT.SV.W.0253.000000T0000Z-260812T1545Z/
Will IL-Kankakee IL-DuPage IL-Cook IL-
942 AM CDT Wed Aug 12 2026
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1045 AM CDT
FOR WILL...NORTHERN KANKAKEE...DUPAGE AND COOK COUNTIES...
At 941 AM CDT, a line of severe thunderstorms extended from Aurora
to Shorewood to Coal City, and was moving east at 45 to 50 mph.
HAZARD...60 mph wind gusts. The strongest winds are expected in Will
County with this storm.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
Locations impacted include...
Chicago, Aurora, Joliet, Naperville, Cicero, Evanston, Bolingbrook,
Skokie, Orland Park, Tinley Park, Oak Lawn, Berwyn, Wheaton, Oak
Park, Downers Grove, Elmhurst, Lombard, Ohare Airport, Carol Stream,
Romeoville, Plainfield, Park Ridge, Calumet City, Addison, and
Glendale Heights.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A tornado watch remains in effect for the warned area. Tornadoes can
develop quickly from severe thunderstorms. Although a tornado is not
immediately likely, if one is spotted act quickly and move to a place
of safety inside a sturdy structure, such as a basement or small
interior room.
For your protection move to an interior room on the lowest floor of a
building.
Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 4120 8824 4190 8826 4204 8767 4190 8762
4190 8760 4183 8760 4172 8753 4116 8753
TIME...MOT...LOC 1441Z 265DEG 44KT 4158 8816
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
Borchardt
Action: Continued Issued At: 2026-08-12 09:51:00
456
WWUS53 KLOT 121450
SVSLOT
Severe Weather Statement
National Weather Service Chicago/Romeoville
950 AM CDT Wed Aug 12 2026
ILC031-043-091-197-121545-
/O.CON.KLOT.SV.W.0253.000000T0000Z-260812T1545Z/
Will IL-Kankakee IL-DuPage IL-Cook IL-
950 AM CDT Wed Aug 12 2026
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1045 AM CDT
FOR WILL...NORTHERN KANKAKEE...SOUTHERN DUPAGE AND COOK COUNTIES...
At 949 AM CDT, a line of severe thunderstorms extended from Aurora
to Lockport to Joliet to Wilmington, and was moving east at 50 mph.
HAZARD...Localized wind gusts to 60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
Locations impacted include...
Chicago, Aurora, Joliet, Naperville, Cicero, Bolingbrook, Orland
Park, Tinley Park, Oak Lawn, Berwyn, Oak Park, Downers Grove,
Elmhurst, Romeoville, Plainfield, Calumet City, Woodridge, Chicago
Heights, West Town, Chicago Lawn, Englewood, Austin, South Shore,
Roseland, and Midway Airport.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A tornado watch remains in effect for the warned area. Tornadoes can
develop quickly from severe thunderstorms. Although a tornado is not
immediately likely, if one is spotted act quickly and move to a place
of safety inside a sturdy structure, such as a basement or small
interior room.
For your protection move to an interior room on the lowest floor of a
building.
Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 4172 8825 4200 8765 4191 8762 4183 8760
4172 8753 4116 8753 4120 8824
TIME...MOT...LOC 1449Z 265DEG 44KT 4159 8801
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
Borchardt
Action: Continued Issued At: 2026-08-12 09:55:45 519 WWUS53 KLOT 121455 SVSLOT Severe Weather Statement National Weather Service Chicago/Romeoville 955 AM CDT Wed Aug 12 2026 ILC031-043-121504- /O.CAN.KLOT.SV.W.0253.000000T0000Z-260812T1545Z/ DuPage IL-Cook IL- 955 AM CDT Wed Aug 12 2026 ...THE SEVERE THUNDERSTORM WARNING FOR SOUTHERN DUPAGE AND COOK COUNTIES IS CANCELLED... The severe thunderstorm which prompted the warning have weakened and no longer appear capable of wind damage. Therefore, the warning has been cancelled. A Severe Thunderstorm Watch remains in effect until 100 PM CDT for northeastern Illinois. && LAT...LON 4132 8824 4140 8753 4116 8753 4120 8824 TIME...MOT...LOC 1454Z 272DEG 40KT 4127 8801 $$ ILC091-197-121545- /O.CON.KLOT.SV.W.0253.000000T0000Z-260812T1545Z/ Will IL-Kankakee IL- 955 AM CDT Wed Aug 12 2026 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1045 AM CDT FOR SOUTHERN WILL AND NORTHERN KANKAKEE COUNTIES... At 954 AM CDT, a severe thunderstorm was located near Lakewood Shores, or 7 miles east of Wilmington, moving east at 45 mph. HAZARD...60 mph wind gusts. SOURCE...Radar indicated. IMPACT...Expect damage to roofs, siding, and trees. Locations impacted include... Bourbonnais, Bradley, Manteno, Braidwood, Wilmington, Peotone, Momence, Beecher, Diamond, Lakewood Shores, Grant Park, Godley, Wilton Center, and Symerton. PRECAUTIONARY/PREPAREDNESS ACTIONS... For your protection move to an interior room on the lowest floor of a building. Torrential rainfall is occurring with this storm, and may lead to flash flooding. Do not drive your vehicle through flooded roadways. && LAT...LON 4132 8824 4140 8753 4116 8753 4120 8824 TIME...MOT...LOC 1454Z 272DEG 40KT 4127 8801 HAIL THREAT...RADAR INDICATED MAX HAIL SIZE...<.75 IN WIND THREAT...RADAR INDICATED MAX WIND GUST...60 MPH $$ Borchardt Action: Cancelled Issued At: 2026-08-12 09:55:45 519 WWUS53 KLOT 121455 SVSLOT Severe Weather Statement National Weather Service Chicago/Romeoville 955 AM CDT Wed Aug 12 2026 ILC031-043-121504- /O.CAN.KLOT.SV.W.0253.000000T0000Z-260812T1545Z/ DuPage IL-Cook IL- 955 AM CDT Wed Aug 12 2026 ...THE SEVERE THUNDERSTORM WARNING FOR SOUTHERN DUPAGE AND COOK COUNTIES IS CANCELLED... The severe thunderstorm which prompted the warning have weakened and no longer appear capable of wind damage. Therefore, the warning has been cancelled. A Severe Thunderstorm Watch remains in effect until 100 PM CDT for northeastern Illinois. && LAT...LON 4132 8824 4140 8753 4116 8753 4120 8824 TIME...MOT...LOC 1454Z 272DEG 40KT 4127 8801 $$ ILC091-197-121545- /O.CON.KLOT.SV.W.0253.000000T0000Z-260812T1545Z/ Will IL-Kankakee IL- 955 AM CDT Wed Aug 12 2026 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1045 AM CDT FOR SOUTHERN WILL AND NORTHERN KANKAKEE COUNTIES... At 954 AM CDT, a severe thunderstorm was located near Lakewood Shores, or 7 miles east of Wilmington, moving east at 45 mph. HAZARD...60 mph wind gusts. SOURCE...Radar indicated. IMPACT...Expect damage to roofs, siding, and trees. Locations impacted include... Bourbonnais, Bradley, Manteno, Braidwood, Wilmington, Peotone, Momence, Beecher, Diamond, Lakewood Shores, Grant Park, Godley, Wilton Center, and Symerton. PRECAUTIONARY/PREPAREDNESS ACTIONS... For your protection move to an interior room on the lowest floor of a building. Torrential rainfall is occurring with this storm, and may lead to flash flooding. Do not drive your vehicle through flooded roadways. && LAT...LON 4132 8824 4140 8753 4116 8753 4120 8824 TIME...MOT...LOC 1454Z 272DEG 40KT 4127 8801 HAIL THREAT...RADAR INDICATED MAX HAIL SIZE...<.75 IN WIND THREAT...RADAR INDICATED MAX WIND GUST...60 MPH $$ Borchardt Action: Continued Issued At: 2026-08-12 10:07:45
871
WWUS53 KLOT 121507
SVSLOT
Severe Weather Statement
National Weather Service Chicago/Romeoville
1007 AM CDT Wed Aug 12 2026
ILC091-197-121545-
/O.CON.KLOT.SV.W.0253.000000T0000Z-260812T1545Z/
Will IL-Kankakee IL-
1007 AM CDT Wed Aug 12 2026
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1045 AM CDT
FOR SOUTHEASTERN WILL AND NORTHEASTERN KANKAKEE COUNTIES...
At 1006 AM CDT, a severe thunderstorm was located over Peotone,
moving east at 50 mph.
HAZARD...Localized wind gusts up to 60 mph.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
Locations impacted include...
Bourbonnais, Bradley, Manteno, Peotone, Momence, Beecher, and Grant
Park.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 4140 8753 4116 8753 4118 8786 4130 8790
4136 8790
TIME...MOT...LOC 1506Z 282DEG 42KT 4134 8782
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
Borchardt
Action: Continued Issued At: 2026-08-12 10:19:16
242
WWUS53 KLOT 121518
SVSLOT
Severe Weather Statement
National Weather Service Chicago/Romeoville
1018 AM CDT Wed Aug 12 2026
ILC091-197-121545-
/O.CON.KLOT.SV.W.0253.000000T0000Z-260812T1545Z/
Will IL-Kankakee IL-
1018 AM CDT Wed Aug 12 2026
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1045 AM CDT
FOR SOUTHEASTERN WILL AND NORTHEASTERN KANKAKEE COUNTIES...
At 1018 AM CDT, a severe thunderstorm was located over Beecher, or 7
miles south of Steger, moving east at 50 mph.
HAZARD...Localized 60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
Locations impacted include...
Bradley, Momence, Beecher, and Grant Park.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 4140 8753 4116 8753 4118 8784 4127 8773
4138 8771
TIME...MOT...LOC 1518Z 265DEG 44KT 4135 8763
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
Borchardt
Action: Cancelled Issued At: 2026-08-12 10:30:46
522
WWUS53 KLOT 121530
SVSLOT
Severe Weather Statement
National Weather Service Chicago/Romeoville
1030 AM CDT Wed Aug 12 2026
ILC091-197-121540-
/O.CAN.KLOT.SV.W.0253.000000T0000Z-260812T1545Z/
Will IL-Kankakee IL-
1030 AM CDT Wed Aug 12 2026
...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN WILL AND
NORTHEASTERN KANKAKEE COUNTIES IS CANCELLED...
The storm which prompted the warning has moved out of the area.
Therefore, the warning has been cancelled. However, heavy rain is
still possible with this thunderstorm.
A Severe Thunderstorm Watch remains in effect until 100 PM CDT for
northeastern Illinois.
To report severe weather, contact your nearest law enforcement
agency. They will relay your report to the National Weather Service
Chicago.
&&
LAT...LON 4140 8753 4116 8753 4118 8784 4127 8773
4138 8771
TIME...MOT...LOC 1528Z 265DEG 44KT 4136 8743
$$
Borchardt
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