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aka "Heartland Derecho", A severe weather event which took place from August 10–11, 2020 across the Midwestern United States and portions of southwestern Ontario. The derecho caused notably high wind speeds of up to 126 mph (203 km/h) recorded in Iowa , with post-damage assessments of up to 140 mph (230 km/h) in some places.
The overall derecho caused about $11 billion (2020 USD) in damage and thousands of power outages. August 15 – An EF1 anticyclonic fire tornado in California from the Loyalton Fire has a tornado warning issued by the National Weather Service, marking the first ever anticyclonic fire tornado to have a tornado warning issued for one.
A warm-weather phenomenon, derechos mostly occur in summer, especially during June, July, and August in the Northern Hemisphere, or March, April, and May in the Southern Hemisphere, within areas of moderately strong instability and moderately strong vertical wind shear. However, derechos can occur at any time of the year.
The straight-line wind storm, which produced severe wind damage across portions of eight Midwestern states on Aug. 10, 2020, is considered the most costly thunderstorm in U.S. history.
Category: Tropical cyclones in Fiji. 5 languages. ... This page was last edited on 22 August 2020, at 22:46 (UTC).
A derecho is a widespread thunderstorm complex, but its severity, distance and duration make this weather phenomenon stand out from the more typical spring and summer storms. The term "derecho" is ...
NOAA satellite imagery of the derecho passing over the Midwest. An intense derecho affected much of the Midwestern United States on August 10–11, 2020, primarily eastern Nebraska, Iowa, Illinois, Wisconsin, and Indiana. It caused high winds and spawned an outbreak of weak tornadoes. Some areas reported torrential rain and large hail. [2] [7] [1]
August 10 is the 222nd day of the year ... 2020 – Derecho in Iowa becomes the most costly thunderstorm disaster in U.S. history. ... 1655 – Alfonso de la Cueva, ...