The Atlantic could see 10 to 16 tropical storms, of which four to eight could become hurricanes, said the National Oceanic and Atmospheric Administration's (NOAA) Climate Prediction Center.
Between one and four of the storms could become major hurricanes of Category Three or higher on a scale of 1-5.
Wind speed in a Category Three hurricane reaches 111-129 miles per hour (178-208 kilometers per hour), with the potential to uproot trees and cause devastating damage to buildings and homes.
"We could be in for more activity than we have seen in recent years," she told reporters, but noted that the forecast "makes no prediction with respect to landfalls or tracks at this point."
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The federal agency acknowledged some overall uncertainty in the forecast, and said its predictions were made with 70 percent likelihood.
"This is a more challenging hurricane season outlook than most because it's difficult to determine whether there will be reinforcing or competing climate influences on tropical storm development," said Gerry Bell, lead seasonal hurricane forecaster with NOAA's Climate Prediction Center.
The 2015 season was considered below average with 11 tropical storms in the Atlantic, of which four became hurricanes, and two became major hurricanes.
The long-term average, taken over the years 1981-2010, typically allows for 12 named storms, six hurricanes, and four major hurricanes.
NOAA will issue another, updated Atlantic hurricane forecast in early August, just before the storm season reaches its peak.