NOAA predicts tamer hurricane season but cites some forecast uncertainty

Join Our Community of Science Lovers!

This article was published in Scientific American’s former blog network and reflects the views of the author, not necessarily those of Scientific American



On supporting science journalism

If you're enjoying this article, consider supporting our award-winning journalism by subscribing. By purchasing a subscription you are helping to ensure the future of impactful stories about the discoveries and ideas shaping our world today.


The U.S. National Oceanic and Atmospheric Administration (NOAA) today forecast a  hurricane season (June to November) in the Atlantic tamer than the one in 2008, which featured 16 storms severe enough to be named. But NOAA's hedging its bets, noting in a statement that "global weather patterns are imposing a greater uncertainty in the 2009 hurricane season outlook than in recent years."

According to the agency, there's a 70 percent chance of nine to 14 named Atlantic storms this year, as many as seven of those with the potential to become hurricanes, which feature winds in excess of 74 miles (121 kilometers) per hour. As many as three could reach "major hurricane" status, meaning their winds blow at more than 111 miles (179 kilometers) per hour. (An average Atlantic season has 11 named storms, including six hurricanes with two becoming major hurricanes.) Hurricanes originate as "tropical systems" once they reach sustained winds of at least 39 miles (63 kilometers) per hour. At the time a weather pattern is dubbed a "tropical system," it's also given a name. The name of this year's first storm will be Ana.

AccuWeather.com, a private weather forecasting organization, in March predicted 13 named storms in the Atlantic this year.

On the Pacific coast, there's an 80 percent chance of a near- to below-normal season, according to NOAA's Central Pacific Hurricane Center and the agency's Climate Prediction Center. There's a 70 percent chance of 13 to 18 named storms, which includes up to 10 hurricanes, of which no more than five will become major hurricanes. Last year, the Pacific saw 16 named storms, 7 of which reached hurricane status. An average eastern Pacific hurricane season –May 15 through Nov. 30–produces up to 16 named storms, with nine becoming hurricanes and as man as five turning into major hurricanes.

For more on hurricanes, see our in-depth report.

Image of 2008's Fay, Gustav, and Hannah hurricanes © National Oceanic and Atmospheric Administration (NOAA)

Larry Greenemeier is the associate editor of technology for Scientific American, covering a variety of tech-related topics, including biotech, computers, military tech, nanotech and robots.

More by Larry Greenemeier

It’s Time to Stand Up for Science

If you enjoyed this article, I’d like to ask for your support. Scientific American has served as an advocate for science and industry for 180 years, and right now may be the most critical moment in that two-century history.

I’ve been a Scientific American subscriber since I was 12 years old, and it helped shape the way I look at the world. SciAm always educates and delights me, and inspires a sense of awe for our vast, beautiful universe. I hope it does that for you, too.

If you subscribe to Scientific American, you help ensure that our coverage is centered on meaningful research and discovery; that we have the resources to report on the decisions that threaten labs across the U.S.; and that we support both budding and working scientists at a time when the value of science itself too often goes unrecognized.

In return, you get essential news, captivating podcasts, brilliant infographics, can't-miss newsletters, must-watch videos, challenging games, and the science world's best writing and reporting. You can even gift someone a subscription.

There has never been a more important time for us to stand up and show why science matters. I hope you’ll support us in that mission.

Thank you,

David M. Ewalt, Editor in Chief, Scientific American

Subscribe