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Home Return to list Severe Thunderstorm Warning 0252 Issued by the Chicago Forecast Office
Action: New Issued At: 2026-08-12 09:03:44
192
WUUS53 KLOT 121403
SVRLOT
ILC063-089-093-121500-
/O.NEW.KLOT.SV.W.0252.260812T1403Z-260812T1500Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Chicago/Romeoville
903 AM CDT Wed Aug 12 2026
The National Weather Service in Chicago has issued a
* Severe Thunderstorm Warning for...
Kendall County in northeastern Illinois...
Grundy County in northeastern Illinois...
Southern Kane County in northeastern Illinois...
* Until 1000 AM CDT.
* At 902 AM CDT, a line of severe thunderstorms extended from
Shabbona to Leland to Wedron to Ottawa, and was moving east at 40
to 45 mph.
HAZARD...70 mph wind gusts. The strongest wind gusts are expected
between the Interstate 88 and 80 corridors, particularly
across Kendall County.
SOURCE...Radar indicated.
IMPACT...Expect considerable tree damage. Damage is likely to
mobile homes, roofs, and outbuildings.
* Locations impacted include...
Aurora, Joliet, Plainfield, St. Charles, Oswego, West Chicago,
Batavia, Geneva, Yorkville, Morris, Channahon, Minooka, Plano,
Sandwich, Coal City, Montgomery, North Aurora, Sugar Grove, Boulder
Hill, Elburn, Diamond, Seneca, Mazon, 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.
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4120 8825 4120 8859 4190 8860 4190 8826
TIME...MOT...LOC 1402Z 268DEG 37KT 4179 8899 4168 8893 4152 8885 4142
8884 4134 8886
TORNADO...POSSIBLE
THUNDERSTORM DAMAGE THREAT...CONSIDERABLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...70 MPH
$$
Borchardt
Action: Continued Issued At: 2026-08-12 09:16:44
677
WWUS53 KLOT 121416
SVSLOT
Severe Weather Statement
National Weather Service Chicago/Romeoville
916 AM CDT Wed Aug 12 2026
ILC063-089-093-121500-
/O.CON.KLOT.SV.W.0252.000000T0000Z-260812T1500Z/
Kendall IL-Grundy IL-Kane IL-
916 AM CDT Wed Aug 12 2026
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1000 AM CDT
FOR KENDALL...GRUNDY AND SOUTHERN KANE COUNTIES...
At 915 AM CDT, a line of severe thunderstorms extended from Waterman
to Sandwich to Senica, and was moving east at 45 mph.
HAZARD...60 mph wind gusts. The strongest wind gusts are expected
between the Interstate 80 and 88 corridors.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
Locations impacted include...
Aurora, Joliet, Plainfield, St. Charles, Oswego, West Chicago,
Batavia, Geneva, Yorkville, Morris, Channahon, Minooka, Plano,
Sandwich, Coal City, Montgomery, North Aurora, Sugar Grove, Boulder
Hill, Elburn, Diamond, Seneca, Mazon, Newark, and Braceville.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Remain alert for a possible tornado! Tornadoes can develop quickly
from severe thunderstorms. If you spot a tornado go at once into the
basement or small central room in a sturdy structure.
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4120 8825 4120 8859 4190 8860 4190 8826
TIME...MOT...LOC 1415Z 267DEG 40KT 4179 8876 4168 8870 4152 8862 4142
8861 4134 8863
TORNADO...POSSIBLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
Borchardt
Action: Continued Issued At: 2026-08-12 09:28:14
806
WWUS53 KLOT 121427
SVSLOT
Severe Weather Statement
National Weather Service Chicago/Romeoville
927 AM CDT Wed Aug 12 2026
ILC063-089-093-121500-
/O.CON.KLOT.SV.W.0252.000000T0000Z-260812T1500Z/
Kendall IL-Grundy IL-Kane IL-
927 AM CDT Wed Aug 12 2026
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1000 AM CDT
FOR KENDALL...GRUNDY AND SOUTHERN KANE COUNTIES...
At 927 AM CDT, a line of severe thunderstorms extended from Big Rock
to Lisbon to Mazon, moving east at 50 mph.
HAZARD...60 mph wind gusts.
SOURCE...Trained weather spotters. 60 mph wind gusts were reported
in Grundy County with this storm.
IMPACT...Expect damage to roofs, siding, and trees.
Locations impacted include...
Aurora, Joliet, Plainfield, St. Charles, Oswego, West Chicago,
Batavia, Geneva, Yorkville, Morris, Channahon, Minooka, Plano,
Sandwich, Coal City, Montgomery, North Aurora, Sugar Grove, Boulder
Hill, Elburn, Diamond, Seneca, Mazon, 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.
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4120 8825 4120 8859 4190 8860 4190 8826
TIME...MOT...LOC 1427Z 266DEG 39KT 4181 8854 4170 8848 4154 8840 4144
8839 4136 8841
TORNADO...POSSIBLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...OBSERVED
MAX WIND GUST...60 MPH
$$
Borchardt
Action: Continued Issued At: 2026-08-12 09:41:14
144
WWUS53 KLOT 121441
SVSLOT
Severe Weather Statement
National Weather Service Chicago/Romeoville
941 AM CDT Wed Aug 12 2026
ILC063-089-093-121500-
/O.CON.KLOT.SV.W.0252.000000T0000Z-260812T1500Z/
Kendall IL-Grundy IL-Kane IL-
941 AM CDT Wed Aug 12 2026
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1000 AM CDT
FOR EASTERN KENDALL...NORTHEASTERN GRUNDY AND SOUTHEASTERN KANE
COUNTIES...
At 940 AM CDT, a line of severe thunderstorms extended from Aurora
to Morris, and was moving east at 45 mph. HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
Locations impacted include...
Aurora, Joliet, Plainfield, St. Charles, Oswego, West Chicago,
Batavia, Geneva, Yorkville, Morris, Channahon, Minooka, Coal City,
Montgomery, North Aurora, Sugar Grove, Boulder Hill, Elburn, Diamond,
Mazon, Braceville, Godley, Carbon Hill, Plattville, and Bristol.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A tornado watch remains in effect for the warned area. Tornadoes can
develop quickly from severe thunderstorms. Although a tornado is not
immediately likely, if one is spotted act quickly and move to a place
of safety inside a sturdy structure, such as a basement or small
interior room.
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4120 8825 4120 8847 4152 8845 4172 8846
4190 8848 4190 8826
TIME...MOT...LOC 1440Z 262DEG 39KT 4178 8843 4171 8831 4161 8822 4144
8826 4137 8833
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
Borchardt
Action: Cancelled Issued At: 2026-08-12 09:49:45
444
WWUS53 KLOT 121449
SVSLOT
Severe Weather Statement
National Weather Service Chicago/Romeoville
949 AM CDT Wed Aug 12 2026
ILC063-089-093-121459-
/O.CAN.KLOT.SV.W.0252.000000T0000Z-260812T1500Z/
Kendall IL-Grundy IL-Kane IL-
949 AM CDT Wed Aug 12 2026
...THE SEVERE THUNDERSTORM WARNING FOR EASTERN KENDALL...NORTHEASTERN
GRUNDY AND SOUTHEASTERN KANE COUNTIES IS CANCELLED...
The storms which prompted the warning have moved out of the area.
Therefore, the warning has been cancelled.
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 4120 8825 4120 8847 4152 8845 4172 8846
4190 8848 4190 8826
TIME...MOT...LOC 1447Z 268DEG 37KT 4178 8833 4171 8821 4161 8812 4144
8816 4137 8823
$$
Borchardt
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