WASHINGTON – With hurricane season less than two weeks away, all thoughts are on what happened last year when a tropical cyclone named Sandy raced north from the Caribbean, hung a sharp left off the mid-Atlantic coast and smashed into New Jersey and New York, killing 147 people, flooding some of the most valuable real estate in America and causing tens of billions of dollars in damage.

The summer and fall promise big storms but steps toward better forecasts. An infusion of Sandy-related dollars from Congress will help the National Weather Service upgrade two supercomputers that are used in virtually all U.S. weather predictions.

That, in turn, could close what some have called an embarrassing gap between the primary U.S. and European computer models. The European model has generally been more adept at forecasting the paths and intensities of major storms, and that pattern held last October when the European model projected the lethal westward turn by Sandy even as the early U.S. model showed it drifting to the east harmlessly, toward open ocean.

Beyond getting better at forecasts, government officials want to improve their communication skills. Last week the National Oceanic and Atmospheric Administration released an after-action “service assessment” on Sandy that gave the weather service a mixed review.

The report praises the weather service for its forecasts, noting that many days in advance the government warned decision makers that they were facing an extremely dangerous storm that carried with it the potential for lethal storm surges.

But the report concluded that the weather service was not always clear in its messages, and that the best information was often hard to root out on its website.

The result was, for many people, confusion. Many inhabitants of the East Coast were concerned about where the storm would make landfall but did not fully grasp how widespread the destruction would be, and how vulnerable they could be from the storm surge. Of the 147 people killed by Sandy, 49 drowned.

The storm came ashore near Brigantine, N.J., early on the evening of Oct. 29. But this was a monstrously vast weather event, with tropical-storm-force winds 1,000 miles across. The effects were felt as far away as Wisconsin.

Sandy was dubbed a “superstorm” because the tropical cyclone collided with an intense low-pressure system rolling in from the west. That led to multiple feet of snow in the Appalachian Mountains. A good forecast is only a good forecast if it’s communicated well and leads to good decisions by public officials and the general populace. That’s the common thread linking most of the 23 recommendations of the weather service assessment.

The report recommends that the weather service develop “explicit storm surge graphics and high-resolution mapping tools” that better illustrate the storm surge threat.

Hurricane season officially begins June 1 and ends Nov. 30, with the great majority of storms forming from August to October. According to meteorologists who study conditions in the Atlantic basin, storm activity this season should be far above normal, with elevated chances of storms making landfall in the United States.

The source of most weather forecasts delivered on your TV news and smartphones are supercomputers housed in Reston, Va., and Orlando, Fla. Congress has approved large parts of NOAA’s spending plan under the Disaster Relief Appropriations Act of 2013 that will direct $23.7 million, a “Sandy supplemental,” to the weather service for forecasting equipment and computer infrastructure.

“This is a breakthrough moment for the National Weather Service and the entire U.S. weather enterprise in terms of positioning itself with the computing capacity and more sophisticated models we’ve all been waiting for,” said Louis Uccellini, director of the weather service.


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