Hurricane Center Has One Name Left: Wilma

The busiest hurricane season on record brought the most intense Atlantic storm ever recorded and ran several days beyond its official Nov. 30 end, while scientists provided the first solid evidence that global warming might be fueling more powerful storms. These were all big stories in and of themselves, yet none will stick with us like the memory of Katrina, the most destructive storm ever to strike the United States and a long-predicted nightmare for resident of New Orleans. Nature's wrath forced scientists and officials to assess preparedness for other dramatic natural threats the country could face.

With the forming of the 20th tropical storm in the Atlantic Basin, this season becomes the second busiest on record. If one more storm forms, as is likely, 2005 will tie for the record and the last name on the list will be used.

Tropical storm Vince became a hurricane Sunday in the far eastern Atlantic. The only name left on this year's list is Wilma, then the National Hurricane Center will switch for the first time to Greek names such Alpha, Beta, and Gamma.

The busiest season on record was 1933 with 21 named storm. There were 20 storms in 1887 and 1995. Reliable hurricane records go back to 1851.

"There is the potential for additional tropical storms and hurricanes to form this season, but it's too early to know exactly where they will develop or if they will affect land," said Scott Kiser, Tropical Cyclone Program Manager for the National Weather Service.

Long-range forecaster William Gray of Colorado State University said earlier this month that he expects October to be busy.

Hurricane names are re-used every six years, except for those of major storms that have been retired. The letter Q, U, X, Y and Z are not used.

Names are given to tropical cyclones when they reach tropical storm status, with top sustained winds of at least 39 mph. The storms are called hurricanes when those sustained wind reach 74 mph.

This season started out as the busiest ever, with 4 named storms by July 5. The season begins June 1, and the busiest months are typically August and September.

Of the 20 named storms that have formed this year, 11 have become hurricanes, including five major hurricanes. The average year has 10 named storms, six hurricanes and two major hurricanes. But meteorologists say we are in the middle of the busy part of a natural cycle that is decades long, so several years of above-average activity are expected.

Still controversial is what effect global warming has on hurricane formation. Recent studies suggest the warmer climate is making hurricanes stronger and fueling an increase in the number of major hurricanes.

Hurricane Vince poses no immediate threat to the United States. In fact, by Monday morning it had degenerated into a tropical storm and was expected to become further disorganized.

Hurricane season runs through Nov. 30.

The Names & Numbers

Deadliest, costliest, busiest months, worst states, plus this year's storm names and more.

How & Where Hurricanes Form

The science of monster storms.

Robert Roy Britt

Robert is an independent health and science journalist and writer based in Phoenix, Arizona. He is a former editor-in-chief of Live Science with over 20 years of experience as a reporter and editor. He has worked on websites such as and Tom's Guide, and is a contributor on Medium, covering how we age and how to optimize the mind and body through time. He has a journalism degree from Humboldt State University in California.