STORM UPDATE: Power restored in Grand Isle County

Updated at 9:01 a.m.

Powerful straight-line winds, not a tornado, caused the destruction across the northern Champlain Valley Thursday that resulted in damaged buildings, broken trees, downed power lines and piles of hail, said National Weather Service forecasters in South Burlington.

"We're calling it straight-line wind damage, basically in the Georgia, Fairfax, Milton and Westford areas," said local meteorologist Brooke Taber.

Inspection of the damage by a local National Weather Service survey team made the determination based on the damage pattern, which spread debris in one direction.

A tornado, Taber said, would cause the debris field to be twisted about in a circular pattern.

The National Weather Service had warned of the risk of tornadoes based on Doppler Radar information that indicated a strong rotation within thunderstorm cells, Taber said. However, the rotation in north central Vermont never reached the ground.

Two other survey teams are scheduled to be on the road by 9 a.m. to inspect other damage in Grand Isle and Rutland counties.

Overnight, line crews worked to restore power to Vermonters in Franklin and Grand Isle counties.

Service was restored to 15,000 of the 18,000 Central Vermont Public Service customers who lost power during the storm, CVPS officials said. About 1,260 customers in Franklin County and 960 customers in Rutland County remained without power this morning. Scattered outages were also reported in Windsor and Chittenden counties.

The National Weather Service reported winds up to 90 mph in northern Vermont and up to 70 mph elsewhere.