Nearly 17,000 people were without power after a heavy storm front moved through Western New York on Sunday evening.

By 9:30 a.m. Monday, the numbers without power had fallen to more than 2,980 in Monroe County, more than 2,300 in Wayne County and lesser numbers in other counties, Rochester Gas and Electric Corp. reported.

Trees were reported down in several areas.

The National Weather Service in Buffalo issued severe thunderstorm warnings for Monroe, Wayne, Wyoming and Ontario counties, and storms hit just after 4:30 p.m. Winds at the Greater Rochester International Airport reached 63 mph.

In Wheatfield, Niagara County, a bounce house with children inside was sent airborne by strong winds at The MAiZE on Niagara Falls Boulevard.

According to the Niagara County Sheriff's Office, the bounce house traveled approximately 50 feet from its original location.

Several children were treated for minor injuries at the scene. A 76-year-old woman, who was standing next to the bounce house, was struck and dragged about 20 feet by the bounce house. She was taken by ambulance to Erie County Medical Center for treatment of non-life-threatening injuries.

The peak of the downpour in Rochester was around 4:50 p.m., when reports of power outages and trees down began coming in.

The jet stream, which has remained to the north, bottling up colder air, will dip just to our south on Monday, Jim Mitchell, meteorologist with the National Weather Service in Buffalo, said.

Showers could continue Sunday night and into Monday morning, according to the National Weather Service. The low is forecast to drop to 47 degrees.

LPEACE@Gannett.com

Includes reporting from Brian Sharp and WGRZ-TV.