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The derecho that struck Chicago, Illinois on 11 July 2011 left more than 860,000 people without electricity. [25] The June 2012 North American derecho took out electrical power to more than 3.7 million customers starting in the Midwestern United States, across the central Appalachians, into the Mid-Atlantic States during a heat wave .
The derecho weakened considerably when the July 2011 Iowa-Illinois-Michigan-Ohio derecho sucked the instability and moisture from the storm over Lake Michigan. The derecho traveled more than 400 miles (640 km) and produced nine tornadoes in North Dakota and Western Minnesota. July 2011 Iowa-Illinois-Michigan-Ohio derecho: July 11, 2011 [32]
A derecho is a significant, potentially destructive weather event that is characterized as having widespread, long-lived, straight-line winds associated with a fast-moving group of severe ...
Multiple tornadoes and thunderstorms that struck the Great Plains and upper Midwest on Dec. 15 were the result of a rare event called a derecho, according to the National Weather Service’s Storm ...
As the derecho moved through Ohio, a second storm developed in Iowa and tracked into northern Illinois. The earlier derecho had used up most of the convective energy in the atmosphere, so this second storm did not become another derecho. Nonetheless, a small MCS with a bow echo developed and became severe as it moved along this track.
The National Weather Service in Sioux Falls classified the storm system as a derecho — a meteorological phenomenon not centered around South Dakota since June 2020, when a ... The term 'derecho ...
As model guidance became clearer during the overnight hours, parts of Iowa and Illinois were put under an enhanced (level 3/5) risk at 13:00 UTC (8AM CDT) before the region was further upgraded to a moderate risk (level 4/5) at 16:30 UTC (11:30AM CDT) once the derecho was clearly underway and expected to continue.
A destructive derecho event struck the states of Iowa, Illinois, Michigan, and Ohio on July 11, 2011, and was the most damaging portion of a much larger derecho event known as The Cross Country Derecho of July 2011. It started on the morning of July 11, 2011, when a powerful long-lasting straight-line windstorm, known as a derecho, developed ...