LANCASTER, Wis. (AP) — A thunderstorm with high winds has knocked down several trees in southern Wisconsin, and also knocked out power to some areas. Numerous trees were downed in Lancaster. There were also reports of damage to sheds and outbuildings in other parts of Grant County. Grant County Emergency Management director Steve Braun says that several homes were also damaged and the power was out in some areas. Trees and power lines were also down in Jefferson County. Much of southeastern Wisconsin was under a severe thunderstorm watch through Monday afternoon.