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Forecasters expect active hurricane season, 10 to 16 named storms

expect active hurricane season
expect active hurricane season

Forecasters expect active hurricane season, 10 to 16 named storms

Forecasters predict a 35 percent chance of an above-normal season, a 40 percent chance of a near-normal season, and a 25 percent chance of a below-normal season for the upcoming hurricane season, which extends from June 1 to November 30.

“With the advances made in hardware and computing over the course of the last year, the ability of NOAA scientists to both predict the path of storms and warn Americans who may find themselves in harm’s way is unprecedented,” said Secretary of Commerce Wilbur Ross. “The devastating hurricane season of 2017 demonstrated the necessity for prompt and accurate hurricane forecasts.”

NOAA’s forecasters predict a 70-percent likelihood of 10 to 16 named storms. That is (winds of 39 mph or higher), of which 5 to 9 could become hurricanes (winds of 74 mph or higher), including 1 to 4 major hurricanes (category 3, 4 or 5; with winds of 111 mph or higher). An average hurricane season produces 12 named storms, of which 6 become hurricanes, including 3 major hurricanes.

Two of the factors are the possibility of a weak El Nino developing. Then along with near-average sea surface temperatures across the tropical Atlantic Ocean and Caribbean Sea. These factors are set upon a backdrop of atmospheric and oceanic conditions that are conducive to hurricane development. They have been producing stronger Atlantic hurricane seasons since 1995.

OAA’s suite of sophisticated technologies  enable decision makers and the general public to take action before, during, and after hurricanes. This helps to build a more “Weather-Ready Nation.”

New tools available this year to assist in hurricane forecasts and communications include:

  • NOAA’s fleet of earth-observing satellites is more robust than ever with the successful launch of the GOES-17 satellite in March. This satellite, along with the GOES-16 satellite – now GOES-East – contribute to a comprehensive picture of weather throughout the Western Hemisphere, allowing forecasters to observe storms as they develop.

  • The new polar-orbiting satellite, NOAA-20, will join the NOAA/NASA Suomi NPP satellite and use a suite of sophisticated instruments to gather high-resolution data from around the globe to feed NOAA’s weather models, driving the 3-7 day weather forecast that is critical to preparedness and effective evacuations.

  • The National Weather Service will run a version of the Global Forecast System. It is called FV3 GFS. FV3 GFS has a new dynamic core alongside the current GFS model. It is often referred to as the American model.  This will mark the first dynamic core upgrade to NOAA’s flagship weather model in more than 35 years. It represents the first step in re-engineering NOAA’s models to provide the best possible science-based predictions for the nation.

  • NOAA’s hurricane-specific model – the Hurricane Weather Research and Forecast system – will be upgraded to offer greater resolution than ever before, increasing model resolution from 1.2 miles to 0.9 miles (2 km to 1.5 km) near the center of a storm. Additionally, the Hurricanes in a Multi-scale Ocean coupled Non-hydrostatic model was first implemented in 2017 and will undergo upgrades for the 2018 season to include greater resolution, new physics and coupling with ocean models.

  • NOAA’s National Hurricane Center will make the Arrival Time of Tropical-Storm-Force Winds graphics operational for this hurricane season. One graphic displays the “earliest reasonable” arrival time of tropical-storm-force winds, at which point further preparedness activities could be hindered. A second graphic displays the “most-likely” arrival time of tropical-storm-force winds.

  • “Preparing ahead of a disaster is the responsibility of all levels of government, the private sector and the public,” said acting FEMA Deputy Administrator Daniel Kaniewski. “It only takes one storm to devastate a community so now is the time to prepare. Do you have adequate insurance, including flood insurance? Does your family have a communication and evacuation plan?

    In addition to the Atlantic hurricane season outlook, NOAA also issued seasonal hurricane outlooks for the eastern and central Pacific basins. An 80 percent chance of a near- or above-normal season is predicted for both the eastern and central Pacific regions. The eastern Pacific outlook calls for a 70-percent probability of 14 to 20 named storms, of which 7 to 12 are expected to become hurricanes, including 3 to 7 major hurricanes. The central Pacific outlook calls for a 70-percent probability of 3 to 6 tropical cyclones, which includes tropical depressions, tropical storms and hurricanes.

    NOAA will update the 2018 Atlantic seasonal outlook in early August, just prior to the peak of the season.

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