Active hurricane season forecast, but who listens?

Seaside residents from New England to Texas can't say they haven't been alerted.

Four groups, including the US government, are calling for a hurricane season far more active than average - although no group currently expects as many storms as last year's record-setting 27. At least two groups are attempting to estimate the likelihood that specific segments of the US coastline will feel the brunt of some of these storms - a far more difficult prediction to make.

Yet for all the time and effort researchers have put into developing these outlooks, some evidence suggests that they might do just as well by telling coastal residents to be prepared no matter where they live. Too often, those warnings go unheeded, a recent poll suggests.

"It takes just one hurricane over your house to make for a bad year," says Max Mayfield, director of the National Hurricane Center. He and his colleagues are placing an extremely high emphasis on individual preparedness, which means being able to take care of one's family unassisted for at least 72 hours.

Still, efforts to warn residents, emergency planners, and industry are worth it, maintains Gerald Bell, who heads up the effort at the National Weather Service's Climate Prediction Center. Hurricanes remain the country's most costly natural hazard year in and year out. "If you're going to have an active season, people need to know that," he says. These are highly confident forecasts."

At a briefing in Miami Monday, the National Oceanic and Atmospheric Administration (NOAA) spelled out its initial forecast for the season, which will be updated in August, on the eve of the season's peak period. It expects 13 to 16 named tropical storms this season, with eight to 10 of those becoming hurricanes. Of those hurricanes, four to six will be intense hurricanes registering Category 3 or above.

That's on par with the forecast from Tropical Storm Risk, based in Britain, which is calling for 14.6 tropical storms during the Atlantic season. Of those, it expects 7.9 to become hurricanes and 3.6 to reach at least Category 3. In April, the hurricane forecast group at Colorado State University estimated that the season would yield 17 tropical storms, leading to nine hurricanes, five of them intense.

Explanations for the high level of storm activity - particularly what some researchers see as an increase in the proportion of strong storms - are mired in a controversy over whether the increased activity in the Atlantic is the result of natural climate variations or global warming.

In NOAA's forecasts, for example, a feature dubbed the Atlantic multidecadal oscillation plays a key role. This is thought to be manifest as a 20- to 40-year (or by some accounts 50- to 80-year) swing in ocean and atmospheric conditions in the North Atlantic. Currently, the North Atlantic is said to be in a warm phase. Warm ocean temperatures fuel hurricanes. Thus, its advocates hold, the Atlantic multidecadal oscillation currently is driving any increased punch.

Page: 1 | 2