Derecho

A derecho is a widespread, long-lived, straight-line windstorm that is associated with a fast-moving band of severe thunderstorms. Derechos can cause hurricane-force winds, tornadoes, heavy rains, and flash floods. The term “derecho” comes from the Spanish word for “straight ahead” or “direct,” in contrast to the twisted wind patterns of a tornado. To be classified as a derecho, the storm must cause wind damage across a path at least 240 miles (390 kilometers) long and include wind gusts of at least 58 mph (93 km/h) along most of its length, with several, well-separated gusts of at least 75 mph (121 km/h). These storms can cause widespread damage and power outages, making them a significant weather hazard.