A derecho is a large cluster of thunderstorms with high winds that can be tens of miles wide and hundreds of miles long. Three derechos struck the Ozarks, Ohio, and Tennessee valleys June 2017 Northern Plains Derecho: June 11, 2017: During the morning hours of June 11, 2017, a dangerous derecho tracked eastward out of South Dakota, across Southern and Central Minnesota, and through Northern Wisconsin into the Upper Peninsula of Michigan. Derechos, fortunately, happen fairly infrequently. Derechos occur mainly across the central and eastern U.S., where many locations are affected one to two times per year on average. They can produce significant damage to … If there’s one area where they happen the most, it’s in parts of the Upper Midwest. How often do derechos happen? While it is hard to predict the next event, 70% of derechos occur during the warmer seasons. Where do derecho occur? Derechos usually exhibit "straight-Line" wind damage, which simply means that the damaging winds all generally occurred in the same direction (i.e., without rotation). They … Put another way, a derecho is a long-lived, widespread damaging wind event created by a line of severe storms. They occur in many states east of the Rockies, but are most common in parts of the South, Midwest, and Plains states. Derechos occur mainly across the central and eastern United States, where many locations are affected one to two times per year on average. Mostly east of the Rocky Mountains in the United States, but there was one that moved through Utah and Wyoming back in 1994. Derechos are often referred to as inland hurricanes due to the hurricanelike conditions, in terms of ferocious wind and torrential rain, which are spawned by this weather phenomenon. "A tornado, when it does occur, may be on the magnitude of a mile or two wide; a derecho could go for hundreds of miles producing significant damage so winds in … Derechos are associated with bow echoes, or bow-shaped bands of severe thunderstorms. Really, all you need is favorable weather conditions for the derecho to … Derechos occur a couple of times a year across the United States, but most do not usually produce wind speeds near 100 m.p.h., Mr. Marsh said. Although winds do not rotate during derechos such as in tornadoes, and do not reach the incredible intensity that some violent tornadoes do, they can still cause extensive damage. Derechos are also prone to occur during the fall and spring months along cold fronts, allowing the systems to grow to over 1,000 miles long in the most extreme cases.
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