The hurricane has now made a landfall has reached land. While the area inside of the eye is relatively calm, the surrounding eyewall is where the harshest weather and winds occur. It swirls, blows, sinks, and rises. The winds in a hurricane exceed 74 miles per hour and circulate counter-clockwise about its center in the Northern Hemisphere or clockwise in the Southern Hemisphere. The second ingredient for a tropical cyclone is wind. Continuing its movement westward, the tropical storm may be moving over even warmer waters.
Next is tropical storm. As it moves across the warm ocean waters, it will continue to become stronger and stronger.
Eventually, a large mass of warm, moist air with rain clouds is formed over the ocean. Wind belts and highs and lows all help direct the journeys of tropical cyclones.
A pattern develops, with the wind circulating around a center like water going down a drain.
Thunderstorms turn ocean heat into hurricane fuel. The air then rises and cools, forming clouds and thunderstorms. When the winds reach between 25 and 38 mph, the storm is called a tropical depression. The rising warm air causes pressure to decrease at higher altitudes.
For more information, click here.
Then air at the surface moves toward the lower pressure area, rises, and creates more thunderstorms. As the moisture evaporates it rises until enormous amounts of heated moist air are twisted high in the atmosphere.
Tropical storm When the wind speeds reach 39 mph, the tropical depression becomes a tropical storm. The air begins to spin because of the rotation of the earth. It usually does not last for long as its fuel warm ocean is cut off, even though the thunderstorms and rains may continue for a while. This is called the eye wall.
When the wind speeds reach 74 mph, the storm is officially a tropical cyclone. Evaporation and condensation continue, building the cloud columns higher and larger. Preparedness, Response, Recovery Ocean Today: