The National Weather Service confirmed over the weekend that the intense storm that ripped through the Silver Run area about 6:30 p.m. Friday night was a tornado.
Fred Davis, a meteorologist with the weather service office at Baltimore-Washington International Airport, said he examined the damage to a barn, chicken coop and woods on Saturday and verified what the residents reported during Friday's brief but violent storm.
Mr. Davis said the twister hit about five miles south of the Pennsylvania line in the 3200 block of Arters Mill Road, west of Littlestown Pike.
The tornado, with winds measuring 60 to 70 mph, caused extensive damage to several buildings built in the 1700s, including a barn, a chicken coop, and about 50 large trees.
Mr. Davis said the tornado winds hit a barn with a timber and corrugated tin roof, tearing off one corner and about 25 percent of the roof.
A nearby chicken coop was picked up and moved in the direction of the storm path, he said.
The residents of the farm, who were just unplugging electrical appliances because of the storm, saw the funnel and immediately headed for the lower level of the farmhouse, the meteorologist said in a statement issued Saturday.
A Union Mills resident who lives about a mile from Arters Mill Road saw the funnel of the tornado and lost about a dozen trees, Mr. Davis said.
Telephone lines to three homes in the 3200 block of Arters Mill Road were still out of service yesterday afternoon.
Dennis Corbitt, who lives in the 3100 block of Arters Mill Road, said he was not at home when the storm hit but came home shortly afterward and found numerous trees down in the area. He said his house did not lose electricity.
His wife, Myra, said she did not look outside at the reported time the tornado touched down but that it was an intense rain and wind storm. They lost the tops of six trees, she said.
There were no reported injuries, according to state police, and damage assessment was not available.
Baltimore Gas and Electric Co. said the storm, part of a cold front moving through the area Friday night, knocked out power to about 2,000 homes in the county.