They can also become derechos or form Line echo wave pattern (LEWP).” These systems can produce severe straight-line winds and occasionally tornadoes, causing major damage. “ A bow echo is the characteristic radar return from a mesoscale convective system that is shaped like an archer’s bow. Yesterday in the early evening my area in Washington DC metro area got hit particularly hard by what is known as a “bow echo storm”, a storm front curved backwards, seen as extending from horizon to horizon and producing continuously along its length strong downdrafts that when they hit the ground spread out as very powerful horizontal winds, in this case peaking at 70 mph around where I live.
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