The improved forecast for New Jersey spurred Republican Gov. Chris Christie to reopen Island Beach State Park on Monday, though it was likely that beachgoers would still be kept out of the water because of the rough waters and rip currents.
A tropical storm warning remained in effect Sunday night from the DE and New Jersey shores north to New York's Long Island and beyond to Martha's Vineyard and Nantucket Island off MA, but was canceled for New York City, which Berg said appeared largely out of harm's way.
As of Sunday evening, tropical-storm-force winds extend outward up to 370 km from the centre and Hermine could possibly re-strengthen into a hurricane in the next day or so, according to the National Hurricane Center (NHC).
Having passed over North Carolina's Outer Banks, the powerful and unsafe Hermine storm, which has claimed at least two lives in Florida and North Carolina, shook the U.S. Middle Atlantic Coast early Sunday, leading to high winds, heavy rains and surging seas and drawing nearer to NY and New Jersey. The North Carolina Department of Transportation closed all bridges in Dare County, which includes the coast and the northern barrier islands.
The National Hurricane Center expected the storm to move slowly up the coast before stalling off New Jersey.
Tropical storm-force winds were possible Monday in New Jersey.
Storm Hermine is regaining power as it moves up the United States eastern seaboard, threatening the north-east with risky coastal surges. The storm was centred about 325 miles (520 kilometres) east-southeast of Ocean City, Maryland.
By 2 p.m. Saturday, Hermine's top sustained winds had increased again to 70 miles per hour as it moved east at 10 miles per hour.
Hermine had already caused two deaths, damaged properties and left hundreds of thousands without electricity from Florida to Virginia.
Nearly as the storm left Florida behind, authorities were already warning people along the coast to prepare.
Michael Mann at Pennsylvania State University noted that this century's 1-foot sea-level rise in New York City meant 25 more square miles flooded during Superstorm Sandy, causing billions in additional damage.
The storm's latest fatality occurred Saturday, September 3, when heavy winds propelled an 18-wheel truck into a bridge railing in North Carolina, killing the unidentified driver, authorities told Agence France-Presse.
Overnight, four people suffered minor injuries when a tornado hit a campground in Hatteras Village, Dare County, North Carolina, officials said.
And at the DE beaches Sunday, people were allowed on the beach, but not in the water due to rough surf and rip currents. There has been significant oceanfront beach erosion in New Jersey.