National Weather Service confirms five tornadoes from August 10 derecho

National Weather Service confirms five tornadoes from August 10 derecho

Climat Société

The National Weather Service confirmed on 12 August that at least five tornadoes, ranging from EF-0 to EF-2, touched down across the Chicago area and northwest Indiana during the derecho on 10 August. The fast-moving squall line produced wind gusts up to 100 mph and prompted tornado warnings across Chicago and its suburbs. Earlier, the service had verified three EF-1 tornadoes in Will and Cook counties, and the mayor of Portage, Indiana, issued an emergency proclamation after roads became impassable and power outages spread.

Acteurs

National Weather Service Pete Sack NBC 5 Indiana State Police Sgt. Glen Fifield

Lieux

Chicago, Illinois, United States Oakbrook Terrace, Illinois, United States Homewood, Illinois, United States Plainfield, Illinois, United States Flossmoor, Illinois, United States Orland Park, Illinois, United States Romeoville, Illinois, United States Tinley Park, Illinois, United States Portage, Indiana, United States Valparaiso, Indiana, United States Merrillville, Indiana, United States

Articles

12 août 2026
2 au total
At least 5 tornadoes hit Chicago area during Tuesday’s storms
At least 5 tornadoes hit Chicago area during Tuesday’s storms

NBC 5 Chicago • 12 août 21h00

At least five tornadoes, ranging from EF-0 to EF-2, were confirmed by the National Weather Service after a severe derecho storm hit the Chicago region and northwest Indiana on Tuesday.

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Clean up begins after at least 3 tornadoes hit south, southwest suburbs
Clean up begins after at least 3 tornadoes hit south, southwest suburbs

ABC7 Chicago • 12 août 10h57

At least three tornadoes passed through Chicago's south and southwest suburbs, causing tree damage, power outages and structural damage as residents begin cleanup.

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11 août 2026
3 au total
At least 3 tornadoes touched down during derecho Tuesday, NWS says
At least 3 tornadoes touched down during derecho Tuesday, NWS says

NBC 5 Chicago • 11 août 22h59

The National Weather Service verified three EF-1 tornadoes across Will and Cook counties as a derecho with wind gusts up to 100 mph struck the Chicago region on Tuesday.

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‘Never seen so much destruction’: Portage, Indiana, chief of police
‘Never seen so much destruction’: Portage, Indiana, chief of police

NBC 5 Chicago • 11 août 21h00

A storm system that swept through northwest Indiana left dozens of roads impassable, widespread power outages and school closures, prompting the mayor to issue an emergency proclamation.

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‘Destructive’ storms pummeled Chicago area, brought 100 mph winds
‘Destructive’ storms pummeled Chicago area, brought 100 mph winds

NBC 5 Chicago • 11 août 17h18

A fast-moving squall line produced wind gusts up to 100 mph, possible tornadoes and widespread damage across Chicago and surrounding suburbs on Tuesday.

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