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15/5/2018, · Hybrid ,derechos, Occasionally, ,derechos, having characteristics of both serial and progressive events are observed. These events are known as hybrid ,derechos,. For example, the "Southern Great Lakes Derecho of May 30-31, 1998 was attendant to a strong, migrating low pressure system.
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, can form during any time of the year, but they're most common during the summer months when the air is extremely hot, very moist, and instability is abundant. The worst ,derechos, tend to form between June and August during or right at the end of a blockbuster heatwave.
Derechos, can be categorized into three main types; serial, progressive, and hybrid. These categories are largely based on the overall organization and behavior of the thunderstorms producing the derecho. The type of derecho most often encountered during the spring and fall is called a serial derecho.
Derechos, start with thunderstorms whereby frontal zones outrun cold fronts. As a result, the winds form mesoscale convective system (MCS) in the upper divergence level of the pattern of the wind. The winds head eastwards towards the equator where there is a warm sector.