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Home Return to list Severe Thunderstorm Warning 0242 Issued by the Chicago Forecast Office
Action: New Issued At: 2026-08-11 10:17:44
343
WUUS53 KLOT 111517
SVRLOT
ILC031-043-089-093-197-111615-
/O.NEW.KLOT.SV.W.0242.260811T1517Z-260811T1615Z/
BULLETIN - EAS ACTIVATION REQUESTED
Severe Thunderstorm Warning
National Weather Service Chicago/Romeoville
1017 AM CDT Tue Aug 11 2026
The National Weather Service in Chicago has issued a
* Severe Thunderstorm Warning for...
Eastern Kendall County in northeastern Illinois...
Central Will County in northeastern Illinois...
Southeastern Kane County in northeastern Illinois...
Southern DuPage County in northeastern Illinois...
Southeastern Cook County in northeastern Illinois...
* Until 1115 AM CDT.
* At 1016 AM CDT, severe thunderstorms were located along a line
extending from Campton Hills to near Yorkville to near Newark,
moving east at 50 mph.
THESE ARE DESTRUCTIVE STORMS FOR CENTRAL AND SOUTHERN PORTIONS OF
THE CHICAGO METROPOLITAN AREA.
HAZARD...80 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Flying debris will be dangerous to those caught without
shelter. Mobile homes will be heavily damaged. Expect
considerable damage to roofs, windows, and vehicles.
Extensive tree damage and power outages are likely.
* Severe thunderstorms will be near...
Aurora, Naperville, Plainfield, Oswego, West Chicago, Batavia,
Geneva, Yorkville, Montgomery, and North Aurora around 1020 AM
CDT.
Joliet, Bolingbrook, Romeoville, Shorewood, Warrenville, and
Winfield around 1025 AM CDT.
Wheaton, Woodridge, Glen Ellyn, Channahon, Lisle, and Crest Hill
around 1030 AM CDT.
Downers Grove, Lombard, Lockport, Homer Glen, Lemont, Oak Brook,
Westmont, and Darien around 1035 AM CDT.
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.
This is a DANGEROUS SITUATION. This is an EXTREMELY DANGEROUS
SITUATION with tornado like wind speeds expected. Mobile homes and
high profile vehicles are especially susceptible to winds of this
magnitude and may be overturned. For your protection move to an
interior room on the lowest floor of a building. These storms have
the potential to cause serious injury and significant property
damage.
&&
LAT...LON 4154 8847 4167 8841 4188 8842 4184 8760
4173 8752 4131 8753
TIME...MOT...LOC 1516Z 278DEG 45KT 4196 8843 4167 8840 4147 8860
TORNADO...POSSIBLE
THUNDERSTORM DAMAGE THREAT...DESTRUCTIVE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...80 MPH
$$
Izzi
Action: Continued Issued At: 2026-08-11 10:22:14
395
WWUS53 KLOT 111522
SVSLOT
Severe Weather Statement
National Weather Service Chicago/Romeoville
1022 AM CDT Tue Aug 11 2026
ILC031-043-089-093-197-111615-
/O.CON.KLOT.SV.W.0242.000000T0000Z-260811T1615Z/
Kendall IL-Will IL-Kane IL-DuPage IL-Cook IL-
1022 AM CDT Tue Aug 11 2026
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1115 AM CDT
FOR EASTERN KENDALL...CENTRAL WILL...SOUTHEASTERN KANE...SOUTHERN
DUPAGE AND SOUTHEASTERN COOK COUNTIES...
At 1019 AM CDT, severe thunderstorms were located along a line
extending from Campton Hills to near Oswego to near Newark, moving
east at 55 mph.
THESE ARE DESTRUCTIVE STORMS FOR CENTRAL AND SOUTHERN PORTIONS OF
THE CHICAGO METROPOLITAN AREA.
HAZARD...80 mph wind gusts.
SOURCE...Local Observations. At 10:15 AM 85 mph wind gusts were
reported at Sugur Grove.
IMPACT...Flying debris will be dangerous to those caught without
shelter. Mobile homes will be heavily damaged. Expect
considerable damage to roofs, windows, and vehicles.
Extensive tree damage and power outages are likely.
These severe storms will be near...
Aurora, Joliet, Naperville, Bolingbrook, Romeoville, Plainfield,
Oswego, West Chicago, Batavia, and Geneva around 1025 AM CDT.
Wheaton, Woodridge, Glen Ellyn, Channahon, Lisle, and Crest Hill
around 1030 AM CDT.
Downers Grove, Lombard, Lockport, Homer Glen, Lemont, Oak Brook,
Westmont, and Darien around 1035 AM CDT.
Other locations in the path of these severe thunderstorms include
Orland Park, New Lenox, Hinsdale, Westchester, Burr Ridge, Western
Springs, Willowbrook, Clarendon Hills, Hillside, Countryside, Tinley
Park, Brookfield, Mokena, Frankfort, Palos Hills, La Grange, Justice,
Summit, Bridgeview, Forest Park, Chicago, Cicero, Oak Lawn, Berwyn,
Midway Airport, South Lawndale, Burbank, Oak Forest, Alsip, Matteson,
Roseland, Chicago Lawn, Bridgeport, Englewood, Harvey, Blue Island,
Dolton, Park Forest, Homewood, Brighton Park, Calumet City, Chicago
Heights, South Shore, Lansing, Steger, Hyde Park, South Deering,
Lynwood, Glenwood and Monee.
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.
This is an EXTREMELY DANGEROUS SITUATION with tornado like wind
speeds expected. Mobile homes and high profile vehicles are
especially susceptible to winds of this magnitude and may be
overturned. For your protection move to an interior room on the
lowest floor of a building. These storms have the potential to cause
serious injury and significant property damage.
&&
LAT...LON 4154 8847 4167 8841 4188 8842 4184 8760
4173 8752 4131 8753
TIME...MOT...LOC 1519Z 277DEG 47KT 4195 8838 4166 8835 4146 8855
TORNADO...POSSIBLE
THUNDERSTORM DAMAGE THREAT...DESTRUCTIVE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...OBSERVED
MAX WIND GUST...80 MPH
$$
Birk
Action: Cancelled Issued At: 2026-08-11 10:40:45
810
WWUS53 KLOT 111540
SVSLOT
Severe Weather Statement
National Weather Service Chicago/Romeoville
1040 AM CDT Tue Aug 11 2026
ILC089-093-111548-
/O.CAN.KLOT.SV.W.0242.000000T0000Z-260811T1615Z/
Kendall IL-Kane IL-
1040 AM CDT Tue Aug 11 2026
...THE SEVERE THUNDERSTORM WARNING FOR EASTERN KENDALL AND
SOUTHEASTERN KANE COUNTIES IS CANCELLED...
The storms which prompted the warning have moved out of the warned
area. Therefore, the warning has been cancelled.
A Severe Thunderstorm Watch remains in effect until 200 PM CDT for
northeastern Illinois...and northwestern Indiana.
&&
LAT...LON 4149 8825 4187 8825 4184 8760 4173 8752
4131 8753
TIME...MOT...LOC 1538Z 281DEG 51KT 4185 8808 4159 8801 4143 8805
$$
ILC031-043-197-111615-
/O.CON.KLOT.SV.W.0242.000000T0000Z-260811T1615Z/
Will IL-DuPage IL-Cook IL-
1040 AM CDT Tue Aug 11 2026
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1115 AM CDT
FOR CENTRAL WILL...SOUTHERN DUPAGE AND SOUTHEASTERN COOK COUNTIES...
At 1038 AM CDT, severe thunderstorms were located along a line
extending from Glen Ellyn to Lockport to near Manhattan, moving east
at 60 mph. This line has a history of producing extensive wind
damage.
THESE ARE DESTRUCTIVE STORMS FOR CENTRAL AND SOUTHERN PORTIONS OF
THE CHICAGO METROPOLITAN AREA.
HAZARD...80 mph wind gusts.
SOURCE...Trained weather spotters. Numerous reports of 80 to 85 mph
winds.
IMPACT...Flying debris will be dangerous to those caught without
shelter. Mobile homes will be heavily damaged. Expect
considerable damage to roofs, windows, and vehicles.
Extensive tree damage and power outages are likely.
Locations impacted include...
Orland Park, Tinley Park, Downers Grove, Oak Forest, New Lenox,
Homer Glen, Brookfield, Mokena, Frankfort, Palos Hills, Chicago,
Cicero, Oak Lawn, Berwyn, Midway Airport, South Lawndale, Burbank,
Blue Island, Park Forest, Homewood, Chicago Heights, Roseland,
Chicago Lawn, Bridgeport, Englewood, Harvey, Dolton, Steger,
Brighton Park, Chatham, Hammond, Calumet City, South Shore,
Lansing, Munster, Hyde Park and South Deering.
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.
This is an EXTREMELY DANGEROUS SITUATION with tornado like wind
speeds expected. Mobile homes and high profile vehicles are
especially susceptible to winds of this magnitude and may be
overturned. For your protection move to an interior room on the
lowest floor of a building. These storms have the potential to cause
serious injury and significant property damage.
&&
LAT...LON 4149 8825 4187 8825 4184 8760 4173 8752
4131 8753
TIME...MOT...LOC 1538Z 281DEG 51KT 4185 8808 4159 8801 4143 8805
TORNADO...POSSIBLE
THUNDERSTORM DAMAGE THREAT...DESTRUCTIVE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...OBSERVED
MAX WIND GUST...80 MPH
$$
Birk
Action: Continued Issued At: 2026-08-11 10:40:45
810
WWUS53 KLOT 111540
SVSLOT
Severe Weather Statement
National Weather Service Chicago/Romeoville
1040 AM CDT Tue Aug 11 2026
ILC089-093-111548-
/O.CAN.KLOT.SV.W.0242.000000T0000Z-260811T1615Z/
Kendall IL-Kane IL-
1040 AM CDT Tue Aug 11 2026
...THE SEVERE THUNDERSTORM WARNING FOR EASTERN KENDALL AND
SOUTHEASTERN KANE COUNTIES IS CANCELLED...
The storms which prompted the warning have moved out of the warned
area. Therefore, the warning has been cancelled.
A Severe Thunderstorm Watch remains in effect until 200 PM CDT for
northeastern Illinois...and northwestern Indiana.
&&
LAT...LON 4149 8825 4187 8825 4184 8760 4173 8752
4131 8753
TIME...MOT...LOC 1538Z 281DEG 51KT 4185 8808 4159 8801 4143 8805
$$
ILC031-043-197-111615-
/O.CON.KLOT.SV.W.0242.000000T0000Z-260811T1615Z/
Will IL-DuPage IL-Cook IL-
1040 AM CDT Tue Aug 11 2026
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1115 AM CDT
FOR CENTRAL WILL...SOUTHERN DUPAGE AND SOUTHEASTERN COOK COUNTIES...
At 1038 AM CDT, severe thunderstorms were located along a line
extending from Glen Ellyn to Lockport to near Manhattan, moving east
at 60 mph. This line has a history of producing extensive wind
damage.
THESE ARE DESTRUCTIVE STORMS FOR CENTRAL AND SOUTHERN PORTIONS OF
THE CHICAGO METROPOLITAN AREA.
HAZARD...80 mph wind gusts.
SOURCE...Trained weather spotters. Numerous reports of 80 to 85 mph
winds.
IMPACT...Flying debris will be dangerous to those caught without
shelter. Mobile homes will be heavily damaged. Expect
considerable damage to roofs, windows, and vehicles.
Extensive tree damage and power outages are likely.
Locations impacted include...
Orland Park, Tinley Park, Downers Grove, Oak Forest, New Lenox,
Homer Glen, Brookfield, Mokena, Frankfort, Palos Hills, Chicago,
Cicero, Oak Lawn, Berwyn, Midway Airport, South Lawndale, Burbank,
Blue Island, Park Forest, Homewood, Chicago Heights, Roseland,
Chicago Lawn, Bridgeport, Englewood, Harvey, Dolton, Steger,
Brighton Park, Chatham, Hammond, Calumet City, South Shore,
Lansing, Munster, Hyde Park and South Deering.
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.
This is an EXTREMELY DANGEROUS SITUATION with tornado like wind
speeds expected. Mobile homes and high profile vehicles are
especially susceptible to winds of this magnitude and may be
overturned. For your protection move to an interior room on the
lowest floor of a building. These storms have the potential to cause
serious injury and significant property damage.
&&
LAT...LON 4149 8825 4187 8825 4184 8760 4173 8752
4131 8753
TIME...MOT...LOC 1538Z 281DEG 51KT 4185 8808 4159 8801 4143 8805
TORNADO...POSSIBLE
THUNDERSTORM DAMAGE THREAT...DESTRUCTIVE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...OBSERVED
MAX WIND GUST...80 MPH
$$
Birk
Action: Cancelled Issued At: 2026-08-11 10:57:15
257
WWUS53 KLOT 111556
SVSLOT
Severe Weather Statement
National Weather Service Chicago/Romeoville
1056 AM CDT Tue Aug 11 2026
ILC043-111606-
/O.CAN.KLOT.SV.W.0242.000000T0000Z-260811T1615Z/
DuPage IL-
1056 AM CDT Tue Aug 11 2026
...THE SEVERE THUNDERSTORM WARNING FOR SOUTHERN DUPAGE COUNTY IS
CANCELLED...
The storms which prompted the warning have moved out of the warned
area. Therefore, the warning has been cancelled.
A Severe Thunderstorm Watch remains in effect until 200 PM CDT for
northeastern Illinois...and northwestern Indiana.
&&
LAT...LON 4142 8797 4177 8775 4176 8754 4173 8752
4131 8753
TIME...MOT...LOC 1556Z 297DEG 67KT 4166 8762 4140 8756 4124 8767
$$
ILC031-197-111615-
/O.CON.KLOT.SV.W.0242.000000T0000Z-260811T1615Z/
Will IL-Cook IL-
1056 AM CDT Tue Aug 11 2026
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1115 AM CDT
FOR EAST CENTRAL WILL AND SOUTHEASTERN COOK COUNTIES...
At 1056 AM CDT, severe thunderstorms were located along a line
extending from Riverdale to near Beecher to Grant Park, moving
southeast at 75 mph.
THESE ARE DESTRUCTIVE STORMS producing measured winds gusts of 90 to
over 100 mph.
HAZARD...100 mph wind gusts.
SOURCE...Trained weather spotters.
IMPACT...You are in a life-threatening situation. Flying debris may
be deadly to those caught without shelter. Mobile homes
will be destroyed. Expect considerable damage to homes and
businesses. Expect extensive tree damage and power outages.
Locations impacted include...
Chicago, Hammond, Orland Park, Tinley Park, Oak Lawn, Calumet City,
Chicago Heights, Roseland, South Shore, Chicago Lawn, Englewood,
Burbank, Lansing, Oak Forest, Harvey, New Lenox, Blue Island,
Munster, Dolton, Park Forest, Homewood, Alsip, Matteson, Mokena, and
Frankfort.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Remain alert for a possible tornado! Tornadoes can develop quickly
from severe thunderstorms. If you spot a tornado go at once into the
basement or small central room in a sturdy structure.
This is an EXTREMELY DANGEROUS SITUATION with tornado like wind
speeds expected. Mobile homes and high profile vehicles are
especially susceptible to winds of this magnitude and may be
overturned. For your protection move to an interior room on the
lowest floor of a building. These storms have the potential to cause
serious injury and significant property damage.
&&
LAT...LON 4142 8797 4177 8775 4176 8754 4173 8752
4131 8753
TIME...MOT...LOC 1556Z 297DEG 67KT 4166 8762 4140 8756 4124 8767
TORNADO...POSSIBLE
THUNDERSTORM DAMAGE THREAT...DESTRUCTIVE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...OBSERVED
MAX WIND GUST...100 MPH
$$
Birk
Action: Continued Issued At: 2026-08-11 10:57:15
257
WWUS53 KLOT 111556
SVSLOT
Severe Weather Statement
National Weather Service Chicago/Romeoville
1056 AM CDT Tue Aug 11 2026
ILC043-111606-
/O.CAN.KLOT.SV.W.0242.000000T0000Z-260811T1615Z/
DuPage IL-
1056 AM CDT Tue Aug 11 2026
...THE SEVERE THUNDERSTORM WARNING FOR SOUTHERN DUPAGE COUNTY IS
CANCELLED...
The storms which prompted the warning have moved out of the warned
area. Therefore, the warning has been cancelled.
A Severe Thunderstorm Watch remains in effect until 200 PM CDT for
northeastern Illinois...and northwestern Indiana.
&&
LAT...LON 4142 8797 4177 8775 4176 8754 4173 8752
4131 8753
TIME...MOT...LOC 1556Z 297DEG 67KT 4166 8762 4140 8756 4124 8767
$$
ILC031-197-111615-
/O.CON.KLOT.SV.W.0242.000000T0000Z-260811T1615Z/
Will IL-Cook IL-
1056 AM CDT Tue Aug 11 2026
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1115 AM CDT
FOR EAST CENTRAL WILL AND SOUTHEASTERN COOK COUNTIES...
At 1056 AM CDT, severe thunderstorms were located along a line
extending from Riverdale to near Beecher to Grant Park, moving
southeast at 75 mph.
THESE ARE DESTRUCTIVE STORMS producing measured winds gusts of 90 to
over 100 mph.
HAZARD...100 mph wind gusts.
SOURCE...Trained weather spotters.
IMPACT...You are in a life-threatening situation. Flying debris may
be deadly to those caught without shelter. Mobile homes
will be destroyed. Expect considerable damage to homes and
businesses. Expect extensive tree damage and power outages.
Locations impacted include...
Chicago, Hammond, Orland Park, Tinley Park, Oak Lawn, Calumet City,
Chicago Heights, Roseland, South Shore, Chicago Lawn, Englewood,
Burbank, Lansing, Oak Forest, Harvey, New Lenox, Blue Island,
Munster, Dolton, Park Forest, Homewood, Alsip, Matteson, Mokena, and
Frankfort.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Remain alert for a possible tornado! Tornadoes can develop quickly
from severe thunderstorms. If you spot a tornado go at once into the
basement or small central room in a sturdy structure.
This is an EXTREMELY DANGEROUS SITUATION with tornado like wind
speeds expected. Mobile homes and high profile vehicles are
especially susceptible to winds of this magnitude and may be
overturned. For your protection move to an interior room on the
lowest floor of a building. These storms have the potential to cause
serious injury and significant property damage.
&&
LAT...LON 4142 8797 4177 8775 4176 8754 4173 8752
4131 8753
TIME...MOT...LOC 1556Z 297DEG 67KT 4166 8762 4140 8756 4124 8767
TORNADO...POSSIBLE
THUNDERSTORM DAMAGE THREAT...DESTRUCTIVE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...OBSERVED
MAX WIND GUST...100 MPH
$$
Birk
Action: Expired Issued At: 2026-08-11 11:11:46
757
WWUS53 KLOT 111611
SVSLOT
Severe Weather Statement
National Weather Service Chicago/Romeoville
1111 AM CDT Tue Aug 11 2026
ILC031-197-111620-
/O.EXP.KLOT.SV.W.0242.000000T0000Z-260811T1615Z/
Will IL-Cook IL-
1111 AM CDT Tue Aug 11 2026
...THE SEVERE THUNDERSTORM WARNING FOR EAST CENTRAL WILL AND
SOUTHEASTERN COOK COUNTIES WILL EXPIRE AT 1115 AM CDT...
The storms which prompted the warning have moved out of the area.
Therefore, the warning will be allowed to expire. However, gusty
winds and heavy rain are still possible with these thunderstorms.
A Severe Thunderstorm Watch remains in effect until 200 PM CDT for
northeastern Illinois...and northwestern Indiana.
&&
LAT...LON 4142 8797 4177 8775 4176 8754 4173 8752
4131 8753
TIME...MOT...LOC 1610Z 278DEG 45KT 4164 8740 4138 8734 4122 8745
$$
Birk
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