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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 350 miles (560 km) and produced winds up to 85 mph (137 km/h) with hail up to Half Dollar Size. [19] Southern U.S. March Derecho: March 9, 2006
However, derechos can occur at any time of the year. They are equally likely during day and night times. Various studies since the 1980s have shed light on the physical processes responsible for the production of widespread damaging winds by thunderstorms.
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.
Downbursts can occur over large areas. In the extreme case, a series of continuing downbursts results in a derecho , which covers huge areas of more than 320 km (200 mi) wide and over 1,600 km (1,000 mi) long, persisting for 12 hours or more, and which is associated with some of the most intense straight-line winds.
At least seven people were killed by the storms, dubbed the Houston derecho by the National Weather Service, [7] which brought winds up to 100 miles per hour (160 km/h) along with four tornadoes. [ 8 ] [ 9 ] [ 10 ]
A warm weather phenomenon, derechos occur mostly in summer, especially June and July in the Northern Hemisphere. They can occur at any time of the year and occur as frequently at night as in the daylight hours. — Preceding unsigned comment added by JKshaw (talk • contribs) 04:03, 3 July 2012 (UTC)
List of derecho events; List of F4 and EF4 tornadoes. List of F4 and EF4 tornadoes (2020–present) List of tornadoes observed by mobile radars; Tornado outbreak and derecho of April 1–3, 2024 – another significant severe weather event that happened less than two months earlier. List of United States tornadoes in May 2024
After the initial derecho passed, the warm weather returned to the region, allowing for more atmospheric destabilization and another set of thunderstorms that evening. [6] Around 3:10 p.m. EDT, an outflow -modified cold front formed over south-central Kentucky, northwest Pennsylvania, and central Ohio, carrying the risk of isolated wind gusts ...