Many States in the United States were hit by a storm system called a derecho.
The speed of the wind during the storm was around 140 km per hour.
The storm has turned the skies green.
Derecho
According to the US’s National Weather Service ‘Derecho’ is “a widespread, long-lived, straight-line windstorm” that is associated with a “band of rapidly moving showers or thunderstorms”.
Derecho is a Straight-line storm in which thunderstorm winds have no rotation, unlike a tornado.
These storms could travel hundreds of miles and cover a large area.
They fall into 3 categories; Progressive, Serial and Hybrid.
In Progressive derecho, a short line of thunderstorms travels for hundreds of miles along a relatively narrow path. It is a summer phenomenon.
In Serial derecho, an extensive wide and long line of thunderstorms – travel across a large area. It usually occurs during spring.
Hybrid derecho has the features of both progressive and serial Derechos.
Derechos mostly occur across central and eastern parts of the United States.
Derechos have also been documented in other parts of the world;
In 2010, Russia witnessed its first documented derecho.
They have been seen in Germany, Finland, Bulgaria and Poland.
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