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Forecasts call for average hurricane season
By Brian K. Sullivan
Bloomberg

After the costliest Atlantic hurricane season in history last year, early forecasts indicate 2018 will be above average.

Look for 14 named storms, and there’s a greater than normal chance of a major system striking the US, according to Colorado State University.

Colorado State’s forecast is closely watched. It’s now in its 35th year, and comes after hurricanes Harvey, Irma and Maria helped drive total losses to more than $215 billion in 2017. However, because it comes so early, the April forecast can be the least accurate, according to Phil Klotzbach, lead author of the report.

‘‘Spring is very volatile,’’ Klotzbach said. ‘‘The changes from April to June can be pretty dramatic.’’

Seven storms could become hurricanes this year and three major systems may reach Category 3 or stronger on the five-step, Saffir-Simpson scale, according to the forecast. There’s a 63 percent chance the continental US will get hit by a major hurricane, compared with the average of 52 percent.

A storm gets a name when it reaches tropical-storm strength with winds of 39 miles per hour. The six-month Atlantic season starts June 1.

A year ago, the researchers predicted 11 named storms, with four becoming hurricanes and two major systems. Turned out there were 17 storms, 10 hurricanes and six major systems.

While hurricanes thrive on hot ocean water, the eastern Atlantic is cool, and the western part of the basin is warm. Over in the Pacific, a weak La Nina is fading and the equatorial region should fall to its neutral state with no guarantee it will warm. Those warm waters along the equatorcan cause more wind shear to develop in the Atlantic that can tear apart storms.

By summer, forecasters should have a better indication of how much wind shear to expect and whether the entire Atlantic is heating up, providing fuel for storms. Still, there can always be surprises.

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