Hurricanes how do they start

The warmer the temps, the more moisture or fuel for the storm. Once a hurricane moves over land, its fuel is cut off and the storm begins to weaken. The second ingredient is a pre-existing spin or area of low pressure. The third ingredient is light vertical wind shear. This allows the thunderstorms to grow tall and not be sheared apart by strong winds. So now it's time to talk about how hurricanes form.

Hurricanes form when warm moist air over water begins to rise. The rising air is replaced by cooler air. This process continues to grow large clouds and thunderstorms. These thunderstorms continue to grow and begin to rotate thanks to earth's Coriolis Effect.

The thunderstorms will rotate counterclockwise in the north hemisphere around the center which is called the eye. The eye is an area of descending air which produces light winds and dry conditions.

The strongest winds will be located just outside the eye in the eye wall. Let's talk about tropical classifications. A tropical Depression is an area of low pressure with a closed center of circulation and sustained winds less than 39mph. A Tropical Storm is when that area of low pressure continues to deepen and has winds between mph. This is when a storm gets a name! Hurricane Names come from the World Meteorological Organization and are on a 6 year rotating list which alternates between male and female names.

A hurricane is a strong area of low pressure with rotating thunderstorms close to its center of circulation. Winds are at least 74mph. There are many dangers associated with hurricanes including storm surge flooding, strong winds and tornadoes. Hurricanes will generally be steered by the upper level wind currents. Hurricanes What is a hurricane? A hurricane is a huge storm! It can be up to miles across and have strong winds spiraling inward and upward at speeds of 75 to mph.

Each hurricane usually lasts for over a week, moving miles per hour over the open ocean. Hurricanes gather heat and energy through contact with warm ocean waters. Evaporation from the seawater increases their power. Hurricanes rotate in a counter-clockwise direction around an "eye" in the Northern Hemisphere and clockwise direction in the Southern Hemisphere. The center of the storm or "eye" is the calmest part. It has only light winds and fair weather.

When they come onto land, the heavy rain, strong winds and large waves can damage buildings, trees and cars. Storms grow if there is a continuous supply of energy from warm ocean water and warm, moist air. Tropical storms can grow into hurricanes, and hurricanes can grow into stronger hurricanes.

However, only a small number of storms grow into tropical storms. Even fewer become hurricanes. Storms weaken when they moves over areas with cooler ocean water. Nor is there as much humidity in the air.

Hurricanes also weaken when they travel over land. As a storm grows, it goes through a series of stages. It starts as a tropical disturbance. Then, with cyclonic circulation and faster wind speeds, it becomes a tropical depression. If the wind keeps getting faster, it becomes a tropical storm and then a hurricane if winds are more than 74 miles per hour mph.