Immediate

Responsive action SHOULD be taken immediately

Ohio Severe Severe Thunderstorm Warning | Effective 08/11/2026 06:40

At 940 AM EDT, a severe thunderstorm was located near Mechanicsburg, moving east at 50 mph. HAZARD...60 mph wind gusts. SOURCE...Radar indicated. IMPACT...Expect damage to trees and power lines. Locations impacted include... Springfield, Dublin, Marysville, London, Jefferson, Plain City, West Jefferson, South Charleston, Mechanicsburg, North Lewisburg, Choctaw Lake, New California, Lake Darby, Harmony, Lisbon, Brighton, Milford Center, Lafayette, South Vienna, and Woodstock. This includes the following Interstates...

Ohio Extreme Tornado Warning | Effective 08/11/2026 06:41

At 941 AM EDT, a severe squall line capable of producing both tornadoes and extensive straight line wind damage was located over Choctaw Lake, moving southeast at 55 mph. HAZARD...Tornado. SOURCE...Radar indicated rotation. IMPACT...Flying debris will be dangerous to those caught without shelter. Mobile homes will be damaged or destroyed. Damage to roofs, windows, and vehicles will occur. Tree damage is likely. Locations impacted include... London, Jefferson, West Jefferson, Mechanicsburg, Choctaw Lake, Lake

Illinois Severe Severe Thunderstorm Warning | Effective 08/11/2026 06:41

At 841 AM CDT, severe thunderstorms were located along a line extending from Scales Mound to Stockton Airport to Mount Carroll, moving east at 50 mph. HAZARD...70 mph wind gusts. SOURCE...Trained weather spotters. IMPACT...Expect considerable tree damage. Damage is likely to mobile homes, roofs, and outbuildings. Locations impacted include... Freeport, Mount Carroll, Savanna, Lena, Stockton, Lanark, Pearl City, Shannon, Woodbine, Nora, Schapville, Massbach, Buena Vista, Loran,

Illinois Severe Severe Thunderstorm Warning | Effective 08/11/2026 06:43

SVRDVN The National Weather Service in the Quad Cities has issued a * Severe Thunderstorm Warning for... Northeastern Jo Daviess County in northwestern Illinois... Stephenson County in northwestern Illinois... * Until 945 AM CDT. * At 843 AM CDT, severe thunderstorms were located along a line extending from near Apple River to Kent to near Mount Carroll, moving east at 50 mph. HAZARD...70 mph wind gusts. SOURCE...Radar indicated. IMPACT...Expect considerable tree damage. Damage is likely to mobile homes, roofs, and outbuildings.

Ohio Extreme Tornado Warning | Effective 08-11-2026 06:35

TORILN The National Weather Service in Wilmington has issued a * Tornado Warning for... Southeastern Champaign County in west central Ohio... Eastern Clark County in west central Ohio... Central Madison County in central Ohio... * Until 1000 AM EDT. * At 935 AM EDT, severe thunderstorms capable of producing both tornadoes and extensive straight line wind damage were located near Mechanicsburg, moving southeast at 55 mph. HAZARD...Tornado. SOURCE...Radar indicated rotation.

Iowa Extreme Tornado Warning | Effective 08-11-2026 06:29

TORDVN The National Weather Service in the Quad Cities has issued a * Tornado Warning for... Southeastern Clinton County in east central Iowa... * Until 900 AM CDT. * At 829 AM CDT, a severe thunderstorm capable of producing a tornado was located near Malone, or 12 miles west of Clinton, moving southeast at 40 mph. HAZARD...Tornado. SOURCE...Radar indicated rotation. IMPACT...Flying debris will be dangerous to those caught without shelter. Mobile homes will be damaged or destroyed.

Indiana Severe Severe Thunderstorm Warning | Effective 08/11/2026 06:10

SVRIND The National Weather Service in Indianapolis has issued a * Severe Thunderstorm Warning for... Northern Rush County in central Indiana... Southern Henry County in east central Indiana... * Until 1015 AM EDT. * At 910 AM EDT, severe thunderstorms were located along a line extending from near New Castle to 11 miles east of Greenfield, moving south at 25 mph. HAZARD...60 mph wind gusts and quarter size hail. SOURCE...Radar indicated. IMPACT...Hail damage to vehicles is expected. Expect wind damage to roofs, siding, and trees.

Iowa Extreme Tornado Warning | Effective 08/11/2026 06:18

At 818 AM CDT, a severe squall line capable of producing both tornadoes and extensive straight line wind damage was located near Delmar, or 8 miles southeast of Maquoketa, moving southeast at 40 mph. HAZARD...Tornado. SOURCE...Radar indicated rotation. IMPACT...Flying debris will be dangerous to those caught without shelter. Mobile homes will be damaged or destroyed. Damage to roofs, windows, and vehicles will occur. Tree damage is likely. These dangerous storms will be near...

Illinois, Iowa Severe Severe Thunderstorm Warning | Effective 08/11/2026 06:20

SVRDVN The National Weather Service in the Quad Cities has issued a * Severe Thunderstorm Warning for... Northeastern Rock Island County in northwestern Illinois... Southwestern Whiteside County in northwestern Illinois... Northeastern Scott County in east central Iowa... Southern Clinton County in east central Iowa... * Until 915 AM CDT. * At 819 AM CDT, severe thunderstorms were located along a line extending from near Delmar to Welton to Walnut Grove Park, moving southeast at 45 mph. HAZARD...70 mph wind gusts.

Indiana Severe Severe Thunderstorm Warning | Effective 08/11/2026 06:21

SVRIWX The National Weather Service in Northern Indiana has issued a * Severe Thunderstorm Warning for... Southwestern Pulaski County in northwestern Indiana... * Until 1000 AM EDT. * At 921 AM EDT, a severe thunderstorm was located near Medaryville, or 8 miles southeast of Wheatfield, moving southeast at 25 mph. HAZARD...60 mph wind gusts and quarter size hail. SOURCE...Radar indicated. IMPACT...Hail damage to vehicles is expected. Expect wind damage to roofs, siding, and trees. * Locations impacted include...
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