When the oceans receives maximum heat from sun in an equatorial region than storms begins with the increase of the temperature of ocean water minimum up to 26.5oC to the depth of 50 meter. All these process begins from the low pressure point between 5oC to 25oC north & south latitude. Hot vapor rising upward & water vapor forms a small storms and is called tropical disturbance. In such small storm forms big storms of high speed. When speed crossed above 119km/hr and it changes into cyclone, hurricane, etc. It may also cross 200km/hr. The main force to occur storm is the process of water vapor turning into clouds and extracts more heat. Hurricanes mostly occurs in September.
The central region having diameter 30-60 km of the storm is known as eye. In comparison to its periphery, the storm has much lower pressure at the eye. The strength has much lower pressure determined by the size of eye with the passage of time. The strength of storm increases as the eye grows smaller. Storms ceases to get energy from the hot water of sea as it comes over land. Then it starts to lose energy & finally come to end. On the basis of the distance from its eye to margin the size of storm is measured. The radius of the storms ranges from 200-900km. According to affirm-Simpson scale the storms in Atlantic ocean & North pacific ocean are categorized into five classes on the basis of their destructiveness & speed. 1 & 2 classes are of low speed and cause less destruction. Generally 3, 4 & 5 classes of storms causes more destruction. The wind in the class 5 storm has the speed of more than 260 km/hr.
At the time of storms the sea water flows away up to 7km. Such rise in sea level is known as storm surge or sea surge but it is not a tsunami caused by earthquake. The wind with the storm creates a large tides that adds to the destruction. And the present situation of global warming has increased the number and strength of storms.
The central region having diameter 30-60 km of the storm is known as eye. In comparison to its periphery, the storm has much lower pressure at the eye. The strength has much lower pressure determined by the size of eye with the passage of time. The strength of storm increases as the eye grows smaller. Storms ceases to get energy from the hot water of sea as it comes over land. Then it starts to lose energy & finally come to end. On the basis of the distance from its eye to margin the size of storm is measured. The radius of the storms ranges from 200-900km. According to affirm-Simpson scale the storms in Atlantic ocean & North pacific ocean are categorized into five classes on the basis of their destructiveness & speed. 1 & 2 classes are of low speed and cause less destruction. Generally 3, 4 & 5 classes of storms causes more destruction. The wind in the class 5 storm has the speed of more than 260 km/hr.
At the time of storms the sea water flows away up to 7km. Such rise in sea level is known as storm surge or sea surge but it is not a tsunami caused by earthquake. The wind with the storm creates a large tides that adds to the destruction. And the present situation of global warming has increased the number and strength of storms.
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