Hurricane season requires preparation even though weather is unpredictable. Meteorologists do their best to forecast coming storms and their potential impact, but it's not always possible to know just how an early swirling mass of weather will perform.
Factors that can affect hurricane season include the weather patterns El Niño and La Niña. According to the National Ocean Service, these weather patterns occur in the Pacific Ocean.
During normal conditions, trade winds blow west along the equator, taking warm water from South America towards Asia. Replacing that warm water, cold water rises from the depths of the ocean in a process called upswelling.
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