Derechos are a widespread and damaging group of severe thunderstorms. The word "derecho" means "straight" in Spanish, which is why the word is used to describe
Derechos are a widespread and damaging group of severe thunderstorms. The word "derecho" means "straight" in Spanish, which is why the word is used to describe a line of thunderstorms that travel in a straight line. These storms often move quickly and conclude in minutes, though major exceptions can travel slower and cause damage over prolonged periods. They have a distinct appearance on radars, known as bow echoes. A derecho often produces significant damage, with winds up to 100–120 mph. Unlike minor thunderstorms, a derecho usually hits suddenly, with strong hurricane force winds, heavy precipitation, and strobing lightning from all directions. A derecho can cause destructive damage over short periods, with an Iowa derecho in 2020 producing severe damage over several hundred miles. These storms usually occur in North America, although they can occur elsewhere around the world. Winds with these storms can exceed 100 miles per hour in certain cases. A derecho requires a squall line capable of producing severe weather hazards like brief and isolated tornadoes, winds over 100–120 miles per hour, and heavy horizontal precipitation.
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