Bands of solid rain or thunderstorms, can form ahead of cold fronts and troughs read due to the significant presence of atmospheric moisture and strong upper level differences, bringing hail and strong winds. When the wind shear in the atmosphere Isr ahead of a cold front in the presence of a strong upper level jet stream, the formation of the tornado is possible. Although tornadoes can form anywhere on Earth, the largest number occurring in the Great Plains in the United States, because the winds off the downsloped winds north south oriented Rocky Mountains, which can form a tornado, helps your development in any strength.
The explosive development of extratropical cyclones can be sudden. The storm known in England as the “Great Storm of 1987” deepened to 953 millibars (28.14 inHg) with a highest recorded winds of 220 km / h (137 mph), resulting in the loss of 19 lives 15 million trees, widespread damage to homes and an estimated economic cost of 1.2 billion (U.S. dollars 2.3 million).
While most tropical cyclones that become extratropical or dissipate quickly or are absorbed by another weather system, can keep even the winds of hurricane or gale force. In 1954, Hurricane Hazel became extratropical North Carolina as a strong Category 3 storm. Columbus Day Storm of 1962, which evolved from the remnants of Typhoon Freda, causing heavy damage in Oregon and Washington, with major damage equivalent to at least a category 3. In 2005, Hurricane Wilma began to lose tropical characteristics, while still held by the category 3 winds of force (and became fully extratropical storm as a Category 1).