La Niña is marked by a cooling of the tropical Pacific Ocean which is the opposite phase of the El Niño event, which is marked by unusually warm tropical water in the Pacific region.
Each can take place in every few years, usually with neutral conditions in between. Both can impact climate change worldwide by changing the direction and strength of winds and altering air pressure and rainfall patterns .
The strengthening of La Niña climate phenomenon could eventually trigger more hurricanes to be anticipated within the hurricane season that starts in June and ends up on November 30. The peak period runs from August through October.
La Niña can contribute to increase Atlantic hurricane activity by decreasing the vertical wind shear over the Caribbean sea and tropical Atlantic Ocean. Wind shear is a sharp difference in wind speed at different levels in the atmosphere.
A strong wind shear reduces hurricanes by breaking up their ability to rise into the air while less shear means they can climb and strengthened.
The National Oceanic and Atmospheric Administration (NOAA) anticipates 14 to 20 named Tropical Storms, as residents of Texas and Mexico are cleaning up from the deluge of Tropical Storm Hermie and Tropical Igor is drifting in the Atlantic.