Straight-line winds of up to 110 mph damaged farm buildings and trees near Alliance as storms tore through the northern Plains.

The Monday storms also produced tornadoes and hail, although no injuries had been reported by Tuesday morning.

A barn about six miles north of Alliance was knocked down, as was a 105-foot tall cottonwood tree that was the centerpiece of the western Nebraska town's Central Park.

The National Weather Service says tornadoes were spotted Monday afternoon in rural Nebraska areas near Kimball, Lake Minatare, Gering and Alliance.

In South Dakota, a tornado reportedly damaged a barn near Thunder Hawk.

Wind also tore the roof off an apartment building in Scottsbluff, Neb., and baseball-size hail was reported in neighboring Gering.

Copyright 2010 The Associated Press.