- Origin and formation: both the hurricanes like the storms tropical are rotary systems of clouds that form over tropical or subtropical waters. However, their intensity and speed of the wind determine their classification.
- Wind speed: depending on the NOAAa system is classified as hurricane when wind speeds reach or exceed 119 km/h (74 km/h). On the other hand, a storm tropical presents winds that oscillate between 63 and 117 km/h (39 and 73 km/h). If a system has speeds of 38 km/h (61 km/h) or less, it is considered a tropical depression.
- Ocean waters: must be warm and be at least 27°C (80°F).
- Unstable atmosphere: occurs when there are differences in temperature and they decrease with height.
- Humid air: it is necessary that it be close to the average level of the atmosphere.
- Geographic location: the freak must be at least 321.869 km/h that is to say 200 m/h (with rare exceptions) at the north or to south from the equator so that it can rotate.
- Consistency in the wind: Little change is required in the speed either address of the wind with the height
- Category 1: Winds from 119 to 153 km/h (74 to 95 km/h). They can cause minor damage to structures and vegetation.
- Category 2: Winds from 154 to 177 km/h (96 to 110 km/h). The damage is more significant, affecting roofs, trees and power lines.
- Category 3: Winds 179 to 208 km/h (111 to 129 km/h). Considerable damage to infrastructure and vegetation is expected.
- Category 4: Winds from 209 to 251 km/h (130 to 156 km/h). The damages are severe, with loss of roofs and structural damage to buildings.
- Category 5: Winds of 253 km/h (157 km/h) or more. The damage is catastrophic, with total destruction of structures and vegetation.
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