The spectacle was amazing, with the rain falling horizontally in powerful curtains, as if gushing intermittently from a huge fire hose, while the majestic trees framing the edge of the property where my high-rise apartment stands were shaking and swaying as if they were so many tufts of grass.Īll of the above observed in twilight darkness, because although the sun was still up, the cloud cover was very thick, the scene illuminated sporadically by big flashes of thunderous lightning. 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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