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Home Return to list Severe Thunderstorm Warning 0241 Issued by the Chicago Forecast Office
Action: New Issued At: 2026-08-11 09:49:14
511
WUUS53 KLOT 111448
SVRLOT
ILC063-093-099-105-111600-
/O.NEW.KLOT.SV.W.0241.260811T1448Z-260811T1600Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Chicago/Romeoville
948 AM CDT Tue Aug 11 2026
The National Weather Service in Chicago has issued a
* Severe Thunderstorm Warning for...
Kendall County in northeastern Illinois...
Northern Livingston County in central Illinois...
La Salle County in north central Illinois...
Grundy County in northeastern Illinois...
* Until 1100 AM CDT.
* At 948 AM CDT, severe thunderstorms were located along a line
extending from near Mendota to near Henry, moving east at 55 mph.
HAZARD...70 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Expect considerable tree damage. Damage is likely to
mobile homes, roofs, and outbuildings.
* Severe thunderstorms will be near...
Peru, La Salle, Oglesby, North Utica, and Tonica around 955 AM
CDT.
Ottawa, Wenona, and Naplate around 1000 AM CDT.
Streator and Grand Ridge around 1005 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.
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4146 8860 4172 8860 4172 8826 4086 8824
4093 8904 4110 8905 4111 8910 4130 8917
4149 8917
TIME...MOT...LOC 1448Z 274DEG 46KT 4157 8908 4111 8926
TORNADO...POSSIBLE
THUNDERSTORM DAMAGE THREAT...CONSIDERABLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...70 MPH
$$
Izzi
Action: Continued Issued At: 2026-08-11 10:06:44
935
WWUS53 KLOT 111506
SVSLOT
Severe Weather Statement
National Weather Service Chicago/Romeoville
1006 AM CDT Tue Aug 11 2026
ILC063-093-099-105-111600-
/O.CON.KLOT.SV.W.0241.000000T0000Z-260811T1600Z/
Kendall IL-Livingston IL-La Salle IL-Grundy IL-
1006 AM CDT Tue Aug 11 2026
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1100 AM CDT
FOR KENDALL...NORTHERN LIVINGSTON...LA SALLE AND GRUNDY COUNTIES...
At 1005 AM CDT, severe thunderstorms were located along a line
extending from near Sandwich to near Serena to 7 miles north of
Ottawa to near Wenona, moving east at 55 mph. This line of storms
has a history of producing wind damage.
HAZARD...70 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Expect considerable tree damage. Damage is likely to mobile
homes, roofs, and outbuildings.
Locations impacted include...
Ottawa, Yorkville, Streator, Plano, Sandwich, Marseilles, South
Streator, Newark, Grand Ridge, Oswego, Montgomery, Seneca, Morris,
Boulder Hill, Joliet, Plainfield, Mazon, Channahon, Minooka,
Dwight, Coal City, Diamond, Gardner and Braceville.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Remain alert for a possible tornado! Tornadoes can develop quickly
from severe thunderstorms. If you spot a tornado go at once into the
basement or small central room in a sturdy structure.
Prepare immediately for damaging winds and deadly cloud to ground
lightning. Seek shelter inside a well-built structure. Stay away from
windows.
&&
LAT...LON 4146 8860 4172 8860 4172 8826 4086 8824
4093 8904 4110 8905 4111 8910 4130 8917
4149 8917
TIME...MOT...LOC 1505Z 273DEG 48KT 4166 8866 4154 8876 4145 8880 4110
8895
TORNADO...POSSIBLE
THUNDERSTORM DAMAGE THREAT...CONSIDERABLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...OBSERVED
MAX WIND GUST...70 MPH
$$
Birk
Action: Continued Issued At: 2026-08-11 10:24:45
425
WWUS53 KLOT 111524
SVSLOT
Severe Weather Statement
National Weather Service Chicago/Romeoville
1024 AM CDT Tue Aug 11 2026
ILC063-093-099-105-111600-
/O.CON.KLOT.SV.W.0241.000000T0000Z-260811T1600Z/
Kendall IL-Livingston IL-La Salle IL-Grundy IL-
1024 AM CDT Tue Aug 11 2026
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1100 AM CDT
FOR KENDALL...NORTHERN LIVINGSTON...SOUTHERN LA SALLE AND GRUNDY
COUNTIES...
At 1024 AM CDT, severe thunderstorms were located along a line
extending from 6 miles west of Plainfield to 8 miles east of Newark
to near Morris to 6 miles north of Cornell, moving east at 60 mph.
HAZARD...70 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Expect considerable tree damage. Damage is likely to mobile
homes, roofs, and outbuildings.
Locations impacted include...
Aurora, Joliet, Plainfield, Oswego, Yorkville, Streator, Morris,
Channahon, Minooka, Plano, Sandwich, Coal City, Marseilles, Dwight,
Montgomery, Boulder Hill, Diamond, Seneca, Gardner, Wenona, Odell,
Mazon, South Streator, Newark, and Braceville.
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.
Prepare immediately for damaging winds and deadly cloud to ground
lightning. Seek shelter inside a well-built structure. Stay away from
windows.
&&
LAT...LON 4146 8860 4172 8860 4172 8826 4086 8824
4093 8904 4110 8905 4113 8901 4132 8878
4144 8867
TIME...MOT...LOC 1524Z 278DEG 50KT 4158 8833 4149 8843 4137 8849 4109
8869
TORNADO...POSSIBLE
THUNDERSTORM DAMAGE THREAT...CONSIDERABLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...OBSERVED
MAX WIND GUST...70 MPH
$$
Birk
Action: Continued Issued At: 2026-08-11 10:45:15
022
WWUS53 KLOT 111544
SVSLOT
Severe Weather Statement
National Weather Service Chicago/Romeoville
1044 AM CDT Tue Aug 11 2026
ILC099-111554-
/O.CAN.KLOT.SV.W.0241.000000T0000Z-260811T1600Z/
La Salle IL-
1044 AM CDT Tue Aug 11 2026
...THE SEVERE THUNDERSTORM WARNING FOR SOUTHERN LA SALLE COUNTY IS
CANCELLED...
The storms which prompted the warning have moved out of the warned
area. Therefore, the warning has been cancelled.
A Severe Thunderstorm Watch remains in effect until 200 PM CDT for
central, northeastern and east central Illinois.
&&
LAT...LON 4144 8848 4172 8829 4172 8826 4086 8824
4091 8859 4098 8860 4102 8858 4123 8858
4135 8856
TIME...MOT...LOC 1544Z 280DEG 54KT 4150 8791 4140 8801 4128 8810 4101
8832
$$
ILC063-093-105-111600-
/O.CON.KLOT.SV.W.0241.000000T0000Z-260811T1600Z/
Kendall IL-Livingston IL-Grundy IL-
1044 AM CDT Tue Aug 11 2026
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1100 AM CDT
FOR EASTERN KENDALL...NORTHEASTERN LIVINGSTON AND GRUNDY COUNTIES...
At 1044 AM CDT, severe thunderstorms were located along a line
extending from near Mokena to near Manhattan to Lakewood Shores to 8
miles southeast of Dwight, moving east at 60 mph.
HAZARD...70 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Expect considerable tree damage. Damage is likely to mobile
homes, roofs, and outbuildings.
Locations impacted include...
Aurora, Joliet, Plainfield, Oswego, Morris, Channahon, Minooka, Coal
City, Dwight, Montgomery, Diamond, Gardner, Odell, Mazon, Braceville,
Cullom, Saunemin, South Wilmington, Godley, Carbon Hill, Plattville,
Verona, Campus, Reddick, and Emington.
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.
Prepare immediately for damaging winds and deadly cloud to ground
lightning. Seek shelter inside a well-built structure. Stay away from
windows.
&&
LAT...LON 4144 8848 4172 8829 4172 8826 4086 8824
4091 8859 4098 8860 4102 8858 4123 8858
4135 8856
TIME...MOT...LOC 1544Z 280DEG 54KT 4150 8791 4140 8801 4128 8810 4101
8832
TORNADO...POSSIBLE
THUNDERSTORM DAMAGE THREAT...CONSIDERABLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...OBSERVED
MAX WIND GUST...70 MPH
$$
Birk
Action: Cancelled Issued At: 2026-08-11 10:45:15
022
WWUS53 KLOT 111544
SVSLOT
Severe Weather Statement
National Weather Service Chicago/Romeoville
1044 AM CDT Tue Aug 11 2026
ILC099-111554-
/O.CAN.KLOT.SV.W.0241.000000T0000Z-260811T1600Z/
La Salle IL-
1044 AM CDT Tue Aug 11 2026
...THE SEVERE THUNDERSTORM WARNING FOR SOUTHERN LA SALLE COUNTY IS
CANCELLED...
The storms which prompted the warning have moved out of the warned
area. Therefore, the warning has been cancelled.
A Severe Thunderstorm Watch remains in effect until 200 PM CDT for
central, northeastern and east central Illinois.
&&
LAT...LON 4144 8848 4172 8829 4172 8826 4086 8824
4091 8859 4098 8860 4102 8858 4123 8858
4135 8856
TIME...MOT...LOC 1544Z 280DEG 54KT 4150 8791 4140 8801 4128 8810 4101
8832
$$
ILC063-093-105-111600-
/O.CON.KLOT.SV.W.0241.000000T0000Z-260811T1600Z/
Kendall IL-Livingston IL-Grundy IL-
1044 AM CDT Tue Aug 11 2026
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1100 AM CDT
FOR EASTERN KENDALL...NORTHEASTERN LIVINGSTON AND GRUNDY COUNTIES...
At 1044 AM CDT, severe thunderstorms were located along a line
extending from near Mokena to near Manhattan to Lakewood Shores to 8
miles southeast of Dwight, moving east at 60 mph.
HAZARD...70 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Expect considerable tree damage. Damage is likely to mobile
homes, roofs, and outbuildings.
Locations impacted include...
Aurora, Joliet, Plainfield, Oswego, Morris, Channahon, Minooka, Coal
City, Dwight, Montgomery, Diamond, Gardner, Odell, Mazon, Braceville,
Cullom, Saunemin, South Wilmington, Godley, Carbon Hill, Plattville,
Verona, Campus, Reddick, and Emington.
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.
Prepare immediately for damaging winds and deadly cloud to ground
lightning. Seek shelter inside a well-built structure. Stay away from
windows.
&&
LAT...LON 4144 8848 4172 8829 4172 8826 4086 8824
4091 8859 4098 8860 4102 8858 4123 8858
4135 8856
TIME...MOT...LOC 1544Z 280DEG 54KT 4150 8791 4140 8801 4128 8810 4101
8832
TORNADO...POSSIBLE
THUNDERSTORM DAMAGE THREAT...CONSIDERABLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...OBSERVED
MAX WIND GUST...70 MPH
$$
Birk
Action: Expired Issued At: 2026-08-11 10:57:15
263
WWUS53 KLOT 111557
SVSLOT
Severe Weather Statement
National Weather Service Chicago/Romeoville
1057 AM CDT Tue Aug 11 2026
ILC063-093-105-111607-
/O.EXP.KLOT.SV.W.0241.000000T0000Z-260811T1600Z/
Kendall IL-Livingston IL-Grundy IL-
1057 AM CDT Tue Aug 11 2026
...THE SEVERE THUNDERSTORM WARNING FOR EASTERN KENDALL...NORTHEASTERN
LIVINGSTON AND GRUNDY COUNTIES WILL EXPIRE AT 1100 AM CDT...
The storms which prompted the warning have moved out of the area.
Therefore, the warning will be allowed to expire.
A Severe Thunderstorm Watch remains in effect until 200 PM CDT for
central, northeastern and east central Illinois.
&&
LAT...LON 4144 8848 4172 8829 4172 8826 4086 8824
4091 8859 4098 8860 4102 8858 4123 8858
4135 8856
TIME...MOT...LOC 1557Z 274DEG 46KT 4149 8771 4139 8781 4127 8790 4100
8813
$$
Birk
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