The following is a list of derecho events.
North America Event Date Notes First Named Derecho July 31, 1877 The severe windstorm crossing Iowa that Prof. Gustavus Hinrichs identified as something special, and named the "derecho" for its straight (rather than spiraling) winds. 1965 Chicago Derecho August 26–27, 1965 Ohio Fireworks Derecho July 4, 1969 1977 Southern – Mid-Atlantic derecho June 6, 1977 Independence Day Derecho of 1977 July 4, 1977 This derecho was important in developing the understanding of what a derecho is. It was captured on radar and studied by Dr. Fujita in his efforts to better identify and formalize descriptions of weather events. It revealed a well-defined bow-shaped echo with edge vortices and was extremely long-lived compared to a tornado. Fujita used information from this storm to formalize terminology and identify radar echo attributes which could be used to identify past and future derechos. Using this information, Fujita analyzed radar signatures from previous windstorms to formally classify some of those as derechos. More Trees Down Derecho July 4–5, 1980 Western Wisconsin Derecho July 15, 1980 Illinois/Michigan Derecho July 16, 1980 I-94 derecho July 19, 1983 1991 West Virginia derecho April 9, 1991 Southern Great Lakes Derecho of 1991 July 7–8, 1991 Pakwash Forest Blowdown July 18, 1991 Near Ear Falls, Ontario – 191,400 hectares of forest blown down, in a line some long.Post-damage survey estimated peak wind speeds of over 1993 Storm of the Century March 12–13, 1993 Florida and Cuba; associated with very significant storm surge June 4, 1993 Derecho June 4, 1993 Midwestern US, Mid-Atlantic US – A fast moving derecho causes significant wind speeds and damage across its path. July 1993 Central Plains derecho July 8–9, 1993 Utah Wyoming Derecho 1994May 31, 1994One of the few identified "Low Dew Point" Derecho events (i.e. one in relatively dry air) according to the National Weather Service. What started as a cluster of thunderstorms in southern Nevada rapidly intensified as they moved northeast into west central Utah. Eventually a powerful line of storms formed producing destructive winds across northern Utah, southwestern Wyoming, and small portions of southeastern Idaho, and northwestern Colorado. The system was unique as surface dew points across the impacted region were in the 40s F to low 50s F (≈4-12 C), much lower (drier) than the typical high 60s F to low 70s F (≈19-23 C), or higher, dew points typically seen during late spring-summer derecho events in the eastern US. Heat wave of 1995 derecho series July 11–15, 1995 Four derechos occurred over 4 consecutive nights. The first one formed the evening of July 11 in eastern Montana and dissipated the next morning over Minnesota. That evening a second derecho followed a nearly identical path before turning south over Michigan and dissipating over Ohio the evening of the 13th. That evening a derecho formed over central South Dakota and moved northeast before dissipating over northeast Minnesota that morning. The final derecho formed over northern Michigan and moved southeast over the Northeast dissipating over the Atlantic Ocean producing winds over Ontario and New York. 14 states were affected by these storms. Late-May 1998 tornado outbreak and derecho May 30–31, 1998 Formed out of a tornado outbreak over South Dakota that produced the F-4 Spencer tornado. The derecho swept across southern Minnesota and northern Iowa producing winds. It crossed into Wisconsin around 12 am CDT bringing widespread damage to almost the entire state with winds being reported from northern Madison to northern Milwaukee. It crossed into Michigan around 4:45 am EDT (causing a seiche over Lake Michigan) bringing winds to the entire state with the southern counties being hit with winds. The event caused the largest power outage recorded in the state's history. It crossed the state at a blistering and entered Ontario bringing winds. The line would dissipate over New York after 11 am EDT. Six people were killed in the derecho and more than two million people lost power. Some areas in Michigan didn't get power restored for ten days. Corn Belt Derecho June 29, 1998 New York State Labor Day derechos September 7, 1998 Boundary Waters-Canadian Derecho July 4–5, 1999 People Chaser Derecho May 27–28, 2001 Affected Kansas, Oklahoma, and Texas on the evening of May 27 into May 28. The strongest winds reached near Garden City, Kansas. One fatality and four injuries, alongside over 150,000 power outages in Oklahoma. 2001 Central Wisconsin derecho June 11, 2001 AKA the "Oshkosh Derecho" October 2001 Mississippi-Ohio Valleys derecho October 24, 2001 March 2002 Serial Derecho March 8–10, 2002 Produced snow, sleet, freezing rain, rain, and hail. Memphis Summer Storm of 2003 July 22, 2003 AKA "Hurricane Elvis" Michigan Ohio Pennsylvania Derecho May 21, 2004 Mississippi – Tennessee Valley Derecho of 2004 July 13, 2004 A derecho formed out of the complex of thunderstorms that included the supercell that caused the Roanoke tornado in central Illinois. It swept southeast over southwest Indiana bringing winds of around to Evansville and much of the city was left without power. As it moved over Kentucky and Tennessee it expanded in size bringing damage to over half of both states with winds peaked at in Southern Kentucky. Louisville reported the most power outages since the 1974 Super Outbreak. winds were also reported in Lexington and a wind gust was reported in Elizabethtown. Hundreds of trees were reported down in Nashville with multiple reports of 60 mph wind gusts. 2005 Upper Midwest Derecho July 23, 2005 A derecho formed in Northeastern South Dakota near Roslyn and traveled through Central Minnesota into West Central Wisconsin, and Central Wisconsin into Southern Wisconsin. The Derecho traveled more than and produced winds up to with hail up to Half Dollar Size. Southern U.S. March Derecho March 9, 2006 April 2, 2006 Tornado Outbreak April 2, 2006 Heat wave of 2006 derecho series July 17–19 and 21, 2006 February 26, 2008, derecho February 26, 2008 June 4, 2008, derecho June 4, 2008 The Iowa Summer Derecho of 2008 July 21, 2008 Chicago Derecho August 4, 2008 May 2009 derecho series May 3–8, 2009 May 2009 Southern Midwest derecho May 8, 2009 AKA "The Inland Hurricane" June 2009 Mid-South Derecho June 12, 2009 June 2009 Southern KY derecho June 16, 2009 June 2009 Midwest Derecho series June 17–19, 2009 June 18 Midwest derechos June 18, 2010 A cluster of thunderstorms over Nebraska developed into a squall line over Iowa during the morning of June 18. This line swept eastward bringing 75 mph winds to Des Moines, Iowa and 60 mph winds to the Quad Cities. It continued across northern Illinois and extreme southern Wisconsin hitting Chicago at 1 pm bringing 70-80 mph winds to the city. The line continued into Michigan and Indiana dramatically growing in size, stretching from Danville, IL to Fort Wayne, IN to Lansing, MI. A 90 mph wind gust was recorded in La Porte, IN. Behind this line, a second squall line developed over northeast Iowa and traveled across the same areas as the first hitting the Quad Cities 6 hours after the first one and Chicago 5 hours after the first line. The first line began dissipating around 9pm EDT over Ohio while the second one would fall below severe limits. 2 people died in the first line while it is unclear if the second one met derecho criteria. Late June 2010 Hybrid Derecho June 23, 2010 October 2010 North American storm complex October 23–28, 2010 April 2011 Serial Derecho and Tornado OutbreakApril 4–5, 2011An extensive serial derecho moved through the entire southeast. The first line formed in Texas and swept northeastward through Arkansas and Northern Louisiana and continued through Kentucky, Tennessee and Northern Mississippi extending over 200 miles in length. As it continued east a new line (associated with the same system) formed over Louisiana and organized over Mississippi and Alabama. At one point the two lines stretched over 800 miles in length. The first line weakened over the Appalachian Mountains while the second one continued across Georgia and South Carolina and grew to also affect Virginia and North Carolina before moving offshore. 1096 wind reports came in, the most on record. 46 tornadoes also touched down.April 2011 Ozarks Serial Derecho and Tornado OutbreakApril 19–20, 2011A second large serial derecho affected areas of the Tennessee River Valley and Midwest. Wind gusts up to 95 mph were recorded. Large hail and 80 tornadoes also occurred with this event. This event would be overshadowed by major tornado outbreaks that occurred just before and after it. July 2011 Upper Midwest-Great Lakes Derecho July 10–11, 2011 A series of derecho-producing convective systems produced a relatively narrow but lengthy swath of wind damage that extended all the way from the central High Plains to the Mid-Atlantic states on July 10–11, 2011. A small powerful derecho first formed in Southern North Dakota producing winds up to , hail up to hen egg sized and nine tornadoes including a large EF2 tornado SE of Napoleon which heavily damaged three farm houses. Two large grain bins were destroyed and thrown considerable distances. Many trees were uprooted or snapped. The derecho produced widespread wind gusts and wind damage reports from Southern North Dakota, Central Minnesota and Western Central Wisconsin. 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 and produced nine tornadoes in North Dakota and Western Minnesota. July 2011 Iowa-Illinois-Michigan-Ohio derecho July 11, 2011 July 2011 Ontario-Quebec-Northern New England derecho July 17, 2011 A fast moving progressive derecho moved into the Ottawa Valley, the province of Quebec and bordering areas of northern New York, Vermont, New Hampshire before dissipating over Maine. 3 people were injured after the stage collapsed at the Ottawa Bluesfest due to the straight line winds. June 2012 Lower Mississippi Valley derecho June 11, 2012 Summer of 2012 derecho series June 29, 2012-August 2012 Event on July 26 was the third derecho in 4 weeks to impact west-central Ohio June 2012 North American derecho June 29–30, 2012 AKA the "Ring of Fire Derecho", passed through nine states from Indiana to New Jersey, cutting power to millions June 12–13, 2013 derecho series June 12–13, 2013 Two derechos developed; one on June 12 and another on June 13. Late June 2013 Chicago derecho June 24, 2013 One person was killed by EF1 tornado near Muscatine, Iowa. Four other tornadoes were also confirmed during this event. Late June 2014 Derechos June 30-July 1, 2014 Also known as the "'One-Two Punch' Derechos", The first derecho began consolidating over Nebraska and swept eastward over Central Iowa where it organized into a small line of storms bringing winds up to 90 mph in the state. It weakened as it crossed into Illinois with the bulk of the 60-70 mph winds occurring in Wisconsin, though the line did restrengthen over Chicago. A second derecho formed right behind the first one and again brought damaging winds across Northern Illinois. It hit Chicago just 3 hours after the first one bringing 80 mph winds. It continued into Northern Indiana bringing 100 mph winds to Lake County before it began to weaken. It dissipated over Ohio at 4 am EDT. Two people were killed in the second derecho.June 21–22, 2015 Severe Weather Event June 21–22, 2015 Winds of recorded on personal weather station near Hayes, South Dakota before it was destroyed. 2015 Midwest Derecho July 12–13, 2015 A powerful derecho first formed in a cluster in Todd and Douglas Counties in Minnesota and then spread to the east and southeast. A barn was one of the first victims south of Aldrich in Todd County. Next there were reports of trees down in Douglas County. There was also tree damag