Hundreds of thousands lost power to a powerful storm system that extended eastward from the Plains toward the Northeast on Thursday, bringing with it high winds and destructive lightning.

(CNN) -- Hundreds of thousands lost power to a powerful storm system that extended eastward from the Plains toward the Northeast on Thursday, bringing with it high winds and destructive lightning.

Severe thunderstorm watches were in effect at one point Thursday evening for a continuous stretch from Oklahoma through New Jersey. And the danger could lurk for several hours longer, with the National Weather Service issuing such warnings in Delaware, Maryland, New Jersey, Kentucky, Virginia, Arkansas and other points in between.

Well before then, the system had already packed a punch.

"The trees were bending sideways, (and) the sky just went really dark and green," said Mark Ventrini, a photographer, of the scene around 7:30 p.m. as he headed toward Belmar, New Jersey. "Some of the storms were pretty intense."

The weather service had received reports of a possible tornadoes touching down in Elmira, New York, and Brookville, Pennsylvania.

Emergency managers in Bromme County, New York, reported people trapped inside a home due to downed trees in the town of Vestal.

Strong storms also caused damage in Binghamton, New York, but the weather service said no injuries or fatalities have been reported.

The residual and more widespread damage came in the form of extensive power outages. More than 100,000 First Energy customers in Pennsylvania, for instance, didn't have electricity as of 10 p.m. ET, with other utilities like PECO and PPL reporting tens of thousands of others similarly in the dark.

An hour earlier, New York Gov. Andrew Cuomo issued a press release stating there were nearly 95,000 customers without power in that state, mostly NYSEG and Central Hudson customers.

Many states away, tens of thousands also were in the dark, though power was being restored at a fairly fast rate. AEP Ohio, for instance, reported just over 51,000 customers lacking electricity at 6:15 p.m., yet more than 20,000 of those had the lights back on by 10 p.m.

CNN's Greg Botelho, Julie Cannold and Dominique Dodley contributed to this report.