Colorado State forecasters predict 2018 hurricane season to be more active than usual

FORT COLLINS, Colo. — After a record drought that featured no major hurricane landfalls in the United States, 2017 roared to life, reminding everyone how powerful and destructive these monster storms can be.

The drought lasted more than a decade and ended with three major hurricanes striking U.S. soil: Harvey, Irma and Maria.

Those three storms all rank among the top five costliest in history. With the 2017 season still fresh on the minds of many coastal residents, the question is: What will 2018 bring?

The Atlantic hurricane season lasts from June through November. With the season less than two months away, Colorado State University issued its preliminary seasonal forecast on Thursday.

Forecasters expect a slightly above-average season, with 14 named storms. Seven of those are expected to become hurricanes and three are expected to be major hurricanes.

While above the long-term average of 12 named storms, six hurricanes and three major hurricanes, this forecast is quieter than 2017, which had 17, 10 and six.

Of these storms, CSU predicts a 63 percent probability of at least one major hurricane making landfall on the continental United States. This number is above the average of 52 percent.

“Last season had near-record warm sea surface temperatures in the tropical Atlantic,” said Phil Klotzbach, a research scientist at CSU.

This near-record warmth contributed to the surge in activity in 2017, especially in terms of major hurricanes.

While the western tropical Atlantic is currently warmer than average, other portions, including the eastern tropical Atlantic and the north Atlantic, are cooler than average.

“As of now, I don’t see anything in the immediate future that would cause sea surface temperatures to warm up dramatically,” Klotzbach said.

“However, there is certainly still time for this to occur, which is one of the biggest challenges with issuing forecasts this early.”

Although hurricane season in the Atlantic starts June 1, the majority of storms occur between mid-August and mid-October, meaning this prediction is coming four months before the bulk of hurricane activity.

El Nino is a naturally occurring phenomenon characterized by warmer than normal water in the eastern Pacific equatorial region.

While El Nino occurs in the Pacific Ocean, it has widespread impacts on the global climate.

One of the elements is increased wind shear across the tropical Atlantic, which creates hostile conditions for hurricane development.

La Nina is the opposite of El Nino, characterized by cooler water in the eastern Pacific equatorial region.

When La Nina is present, conditions tend to be more favorable for hurricane development in the Atlantic.

Conditions currently are a weak La Nina, but the forecasters at Colorado State believe there will be a transition to a neutral phase of El Nino-Southern Oscillation over the next several months.

“If El Nino were to suddenly develop, that would certainly knock down our forecast,” Klotzbach said.

Regardless of the season’s activity, Colorado State forecasters remind coastal residents that it only takes one hurricane making landfall to make it an active season for them.

Colorado State will update its outlook on May 31 after further analysis of the current atmospheric and oceanic conditions.

Additionally, the National Oceanic and Atmospheric Administration will provide its hurricane outlook in May.

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