This aerial view made Friday, May 23, 2008, shows a neighborhood in Windsor, Colo., hit Thursday by a tornado that killed at least one person and damaged or destroyed dozens of homes.
A "For Sale" sign is posted in the window of a car crushed by a tree during a tornado in Windsor, Colo., Friday, May 23, 2008. The tornado struck the area Thursday afternoon.
A historic flour mill was left standing, but significantly damaged after Thursday's tornado in Windsor, Colo., Friday May 23, 2008.
A severe tornado hit a former church in Windsor, Colo., Thursday, May 22, 2008. The large tornado skipped through several northern Colorado towns on Thursday, destroying dozens of homes, flipping tractor-trailers and freight rail cars, and killing at least one person.
A severe tornado knocked this recreational vehicle over in Windsor, Colo., Thursday, May 22, 2008. A twister skipped through several towns in Weld County on Thursday, damaging or destroying dozens of homes, businesses, dairies and farms. The storm system pelted the region with golf-ball-size hail, swept vehicles off roads and tipped 15 rail cars off the tracks in Windsor, a farm town about 70 miles north of Denver.
Trains are derailed after a tornado passed through Windsor, Colo., Thursday, May 22, 2008. A second tornado also touched down in the area near Johnstown, 8 miles southwest of Greeley, the National Weather Service reported. There were no immediate reports of injuries.
Dane Snyder picks through the remains of his shed just south of Gilcrest, Colo., on Thursday, May 22, 2008, after a tornado tore though the area. Snyder was looking for his chainsaw to help remove downed trees.
Craig Singleton displays racquetball sized hail he collected after a tornado hit Windsor, Colo., on Thursday, May 22, 2008.
Sam Shaw carries her daughter, Alexa Shaw, 2, in a wagon along with belongings she removed from her Windsor, Colo., home Thursday May 22, 2008, as residents were told to evacuate. A second tornado touched down in the area near Johnstown, 8 miles southwest of Greeley, the National Weather Service reported.
Kari Peter runs past her neighbor's home Thursday, May 22, 2008, in Windsor, Colo., after a tornado swept through the area.
LaRoy Evans, a salvage contractor, walks around the property of John Brookman after a tornado hit, Thursday, May 22, 2008, in Dacono, Colo. Jerry Taft, the son of Brookman's wife, Carolyn, was living inside the trailer when it was flipped. Taft was transported to Good Samaritan Hospital in Lafayette, Colo., in stable condition.
Two unidentified women run for cover past a destroyed shed as a small windstorm kicks up dust just south of Gilcrest, Colo., on Thursday, May 22, 2008, following a tornado in the area. Severe storms tore through several northern Colorado towns on Thursday, killing at least one person and flipping over tractor-trailers, toppling freight rail cars and ripping roofs off buildings.
Craig Singleton, left, and Gene Kang sit on a toppled tree in their Locust Street neighborhood after a tornado hit, Thursday, May 22, 2008, in Windsor, Colo.
Elier Dominguez looks in the debris for any possessions after a tornado destroyed his home, Thursday, May 22, 2008 in Windsor, Colo. A second tornado touched down in the area near Johnstown, 8 miles southwest of Greeley, the National Weather Service reported.
Richard Beardmore, left, and Sarah Shafer sit atop the tree that fell and crushed Beardmore's brother's car as a tornado ripped through Windsor, Colo. Thursday, May 22, 2008. A second tornado touched down in the area near Johnstown, 8 miles southwest of Greeley, the National Weather Service reported.
An old barn stands in a wheat field as a sever thunderstorm passes in the distance near Ogallah, Kan., Thursday, May 22, 2008. Severe thunderstorms dropped tornadoes across much of northwest Kansas, northern Colorado and southern Wyoming.
A boat sits to the side of Interstate 80 after a severe thunderstorm producing high winds and marble-sized hail swept through Laramie, Wyo., Thursday, May 22, 2008. The National Weather Service confirmed a tornado had touched down.