2007-05-14 07:38:55 · 4 answers · asked by Matt 1 in Science & Mathematics ➔ Weather
tropical storm from 39-73
Hurricane from 74 mph and up
2007-05-14 07:51:26 · answer #1 · answered by Kevin B 4 · 0⤊ 0⤋
A hurricane is an intense tropical storm. Tropical storms form over warm tropical oceans during periods when local sea surface temperatures are above 26 °C.
Under these conditions, evaporation from the ocean surface generates very high humidity in the atmosphere, which in turn generates thunderstorms.
A tropical storm forms when a system of powerful thunderstorms begins to rotate in the atmosphere, forming a vortex known as a tropical depression.
Energy from ocean heat also generates high winds. The more heat available in the surface water, the more potential there is to generate heavy rain and high wind.
2007-05-14 14:51:53 · answer #2 · answered by *Gold* 4 · 0⤊ 0⤋
When a tropical grows more intense and fast enough.
2007-05-14 18:33:27 · answer #3 · answered by Yueqing 2 · 0⤊ 0⤋
if there is a low pressure
2007-05-14 14:49:53 · answer #4 · answered by Jeniv the Brit 7 · 0⤊ 0⤋