Tropical cyclones usually develop under the following three key weather conditions:
-
Warm Ocean Water: Tropical cyclones require sea surface temperatures of at least 26.5 degrees Celsius (about 80 degrees Fahrenheit) to provide the heat and moisture needed to fuel the storm. The warm water allows for evaporation, which adds humidity to the atmosphere.
-
Atmospheric Instability: A favorable atmosphere, which includes a warm, moist air mass near the ocean's surface and cooler air aloft, promotes upward motion. This instability allows for the development of thunderstorms, which can organize into a tropical cyclone.
-
Low Wind Shear: Tropical cyclones need low vertical wind shear, which refers to the change in speed and direction of winds at different altitudes. Low wind shear allows the storm to maintain its structure and organization, enabling it to strengthen. High wind shear can disrupt the formation of a cyclone by tilting or displacing the storm system.
Together, these conditions create a conducive environment for the development and intensification of tropical cyclones.
1 answer