Last year’s season ended with 10 hurricanes and six major hurricanes. The Atlantic basin annually averages 12 named storms, with six hurricanes and three major hurricanes.
NOAA added that there is a 75% chance that the 2018 season will see near or more than the average number of storms in the basin.
“The devastating hurricane season of 2017 demonstrated the necessity for prompt and accurate hurricane forecasts,” US Commerce Secretary Wilbur Ross said.
As usual, the latest forecast cannot offer the bit of information most critical to residents living in hurricane-prone areas, from the Gulf Coast of Texas to the Carolinas and, sometimes, as far north as Boston: precisely where this year’s storms might strike.
El Niño pattern could make for fewer storms
The 2017 season was very active, in part, because of a weak La Niña that developed during the six-month hurricane season that ends December 1.
La Niña is a naturally occurring phenomenon characterized by cooler than normal water in the eastern Pacific equatorial region. While La Niña occurs in the Pacific Ocean, it has a widespread impact on the global climate. That includes decreased wind shear across the tropical Atlantic, which creates favorable conditions for tropical development.
But La Niña has since disappeared, making way for what are now “ENSO-neutral conditions” — meaning neither La Niña nor its opposite, El Niño, is present — according to Gerry Bell, lead hurricane season forecaster with NOAA’s Climate Prediction Center.
“The models are suggesting that El Niño could possibly develop later in the season,” Bell said Thursday.
El Niño features warmer water in the eastern Pacific equatorial region, creating greater wind shear in the Atlantic, and thus, fewer tropical storms.
If El Niño does develop by October, “it could possibly shut down or weaken the latter part of the season,” Bell said.
But that is certainly no guarantee. And if El Niño fails to make an appearance, Bell warned, “We could certainly see the seasonal activity near the higher-end of the predicted range.”
2018 season may get an early start
As Memorial Day approaches, forecasters predict an 90% chance of tropical or subtropical development by the end of the long weekend.
Other 2018 season forecasts
Beyond the National Oceanic and Atmospheric Administration, dubbed NOAA, most meteorologists agree that the 2018 season will be near or above average.
Source : CNN