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Home Return to list Severe Thunderstorm Warning 0251 Issued by the Chicago Forecast Office
Action: New Issued At: 2026-08-12 08:31:43 381 WUUS53 KLOT 121331 SVRLOT ILC037-103-141-121445- /O.NEW.KLOT.SV.W.0251.260812T1331Z-260812T1445Z/ BULLETIN - IMMEDIATE BROADCAST REQUESTED Severe Thunderstorm Warning National Weather Service Chicago/Romeoville 831 AM CDT Wed Aug 12 2026 The National Weather Service in Chicago has issued a * Severe Thunderstorm Warning for... Eastern Lee County in north central Illinois... Southeastern Ogle County in north central Illinois... De Kalb County in north central Illinois... * Until 945 AM CDT. * At 830 AM CDT, line of severe thunderstorms extended from Woosung to Amboy to La Moille, and was moving east at around 40 mph. HAZARD...60 mph wind gusts. SOURCE...Radar indicated. IMPACT...Expect damage to roofs, siding, and trees. * Locations impacted include... DeKalb, Sycamore, Rochelle, Sandwich, Shabbona, Cortland, Hinckley, Somonauk, Waterman, Hillcrest, Maple Park, Malta, Paw Paw, Creston, Lindenwood, Lee, Compton, Steward, West Brooklyn, and Kings. 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 4205 8916 4206 8860 4163 8860 4163 8917 TIME...MOT...LOC 1330Z 264DEG 37KT 4192 8956 4183 8945 4170 8939 4151 8932 TORNADO...POSSIBLE HAIL THREAT...RADAR INDICATED MAX HAIL SIZE...<.75 IN WIND THREAT...RADAR INDICATED MAX WIND GUST...60 MPH $$ Borchardt Action: Continued Issued At: 2026-08-12 08:45:43 745 WWUS53 KLOT 121345 SVSLOT Severe Weather Statement National Weather Service Chicago/Romeoville 845 AM CDT Wed Aug 12 2026 ILC037-103-141-121445- /O.CON.KLOT.SV.W.0251.000000T0000Z-260812T1445Z/ Lee IL-Ogle IL-De Kalb IL- 845 AM CDT Wed Aug 12 2026 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 945 AM CDT FOR EASTERN LEE...SOUTHEASTERN OGLE AND DE KALB COUNTIES... At 844 AM CDT, a line of severe thunderstorms extended from Lost Nation to Ashton to Sublette and was moving east at 45 mph. HAZARD...60 mph wind gusts. SOURCE...Radar indicated. IMPACT...Expect damage to roofs, siding, and trees. Locations impacted include... DeKalb, Sycamore, Rochelle, Sandwich, Shabbona, Cortland, Hinckley, Somonauk, Waterman, Hillcrest, Maple Park, Malta, Paw Paw, Creston, Lindenwood, Lee, Compton, Steward, West Brooklyn, and Kings. PRECAUTIONARY/PREPAREDNESS ACTIONS... Remain alert for a possible tornado! Tornadoes can develop quickly from severe thunderstorms. If you spot a tornado go at once into the basement or small central room in a sturdy structure. For your protection move to an interior room on the lowest floor of a building. && LAT...LON 4205 8916 4206 8860 4163 8860 4163 8917 TIME...MOT...LOC 1344Z 262DEG 38KT 4194 8936 4185 8925 4172 8919 4153 8912 TORNADO...POSSIBLE HAIL THREAT...RADAR INDICATED MAX HAIL SIZE...<.75 IN WIND THREAT...RADAR INDICATED MAX WIND GUST...60 MPH $$ Borchardt Action: Continued Issued At: 2026-08-12 08:58:43
086
WWUS53 KLOT 121358
SVSLOT
Severe Weather Statement
National Weather Service Chicago/Romeoville
858 AM CDT Wed Aug 12 2026
ILC037-103-141-121445-
/O.CON.KLOT.SV.W.0251.000000T0000Z-260812T1445Z/
Lee IL-Ogle IL-De Kalb IL-
858 AM CDT Wed Aug 12 2026
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 945 AM CDT
FOR EASTERN LEE...SOUTHEASTERN OGLE AND DE KALB COUNTIES...
At 858 AM CDT, severe thunderstorms were located along a line
extending from near Ashton to near Rochelle to Paw Paw to near
Earlville, moving east at 45 mph.
HAZARD...60 mph wind gusts. The strongest wind gusts are expected
along and south of Interstate 88.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
Locations impacted include...
DeKalb, Sycamore, Rochelle, Sandwich, Shabbona, Cortland, Hinckley,
Somonauk, Waterman, Hillcrest, Maple Park, Malta, Paw Paw, Creston,
Lee, Compton, Steward, and West Brooklyn.
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 4194 8916 4206 8860 4163 8860 4163 8917
TIME...MOT...LOC 1358Z 264DEG 38KT 4190 8916 4184 8906 4170 8896 4153
8888
TORNADO...POSSIBLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
Borchardt
Action: Cancelled Issued At: 2026-08-12 09:09:14
284
WWUS53 KLOT 121409
SVSLOT
Severe Weather Statement
National Weather Service Chicago/Romeoville
909 AM CDT Wed Aug 12 2026
ILC141-121418-
/O.CAN.KLOT.SV.W.0251.000000T0000Z-260812T1445Z/
Ogle IL-
909 AM CDT Wed Aug 12 2026
...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN OGLE COUNTY IS
CANCELLED...
The storms which prompted the warning have weakened. Therefore, the
warning has been cancelled.
A Severe Thunderstorm Watch remains in effect until 100 PM CDT for
north central and northeastern Illinois.
&&
LAT...LON 4183 8911 4190 8860 4163 8860 4163 8904
4173 8905
TIME...MOT...LOC 1408Z 264DEG 37KT 4191 8905 4185 8895 4171 8885 4154
8877
$$
ILC037-103-121445-
/O.CON.KLOT.SV.W.0251.000000T0000Z-260812T1445Z/
Lee IL-De Kalb IL-
909 AM CDT Wed Aug 12 2026
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 945 AM CDT
FOR EAST CENTRAL LEE AND SOUTHERN DE KALB COUNTIES...
At 908 AM CDT, severe thunderstorms were located along a line
extending from Stweard to Paw Paw, moving east at 45 mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
Locations impacted include...
Sandwich, Shabbona, Hinckley, Somonauk, Waterman, Paw Paw, and Lee.
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 4183 8911 4190 8860 4163 8860 4163 8904
4173 8905
TIME...MOT...LOC 1408Z 264DEG 37KT 4191 8905 4185 8895 4171 8885 4154
8877
TORNADO...POSSIBLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
Borchardt
Action: Continued Issued At: 2026-08-12 09:09:14
284
WWUS53 KLOT 121409
SVSLOT
Severe Weather Statement
National Weather Service Chicago/Romeoville
909 AM CDT Wed Aug 12 2026
ILC141-121418-
/O.CAN.KLOT.SV.W.0251.000000T0000Z-260812T1445Z/
Ogle IL-
909 AM CDT Wed Aug 12 2026
...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN OGLE COUNTY IS
CANCELLED...
The storms which prompted the warning have weakened. Therefore, the
warning has been cancelled.
A Severe Thunderstorm Watch remains in effect until 100 PM CDT for
north central and northeastern Illinois.
&&
LAT...LON 4183 8911 4190 8860 4163 8860 4163 8904
4173 8905
TIME...MOT...LOC 1408Z 264DEG 37KT 4191 8905 4185 8895 4171 8885 4154
8877
$$
ILC037-103-121445-
/O.CON.KLOT.SV.W.0251.000000T0000Z-260812T1445Z/
Lee IL-De Kalb IL-
909 AM CDT Wed Aug 12 2026
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 945 AM CDT
FOR EAST CENTRAL LEE AND SOUTHERN DE KALB COUNTIES...
At 908 AM CDT, severe thunderstorms were located along a line
extending from Stweard to Paw Paw, moving east at 45 mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
Locations impacted include...
Sandwich, Shabbona, Hinckley, Somonauk, Waterman, Paw Paw, and Lee.
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 4183 8911 4190 8860 4163 8860 4163 8904
4173 8905
TIME...MOT...LOC 1408Z 264DEG 37KT 4191 8905 4185 8895 4171 8885 4154
8877
TORNADO...POSSIBLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
Borchardt
Action: Cancelled Issued At: 2026-08-12 09:29:14
971
WWUS53 KLOT 121428
SVSLOT
Severe Weather Statement
National Weather Service Chicago/Romeoville
928 AM CDT Wed Aug 12 2026
ILC037-103-121438-
/O.CAN.KLOT.SV.W.0251.000000T0000Z-260812T1445Z/
Lee IL-De Kalb IL-
928 AM CDT Wed Aug 12 2026
...THE SEVERE THUNDERSTORM WARNING FOR EAST CENTRAL LEE AND SOUTHERN
DE KALB COUNTIES IS CANCELLED...
The storms which prompted the warning have moved out of the area.
Therefore, the warning has been cancelled.
A Severe Thunderstorm Watch remains in effect until 100 PM CDT for
north central and northeastern Illinois.
To report severe weather, contact your nearest law enforcement
agency. They will relay your report to the National Weather Service
Chicago.
&&
LAT...LON 4183 8911 4190 8860 4163 8860 4163 8904
4173 8905
TIME...MOT...LOC 1426Z 264DEG 37KT 4193 8880 4187 8870 4173 8860 4156
8852
$$
Borchardt
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