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SLIDESHOW: Southeast, Midwest Tornado Devastation

WEST LIBERTY, Kentucky (CNN) — Snow fell in parts of Kentucky and Indiana Monday, blanketing the shards of glass, splintered wood and twisted metal that a series of vicious twisters left behind last week.

About three inches of snow fell overnight in West Liberty, Kentucky, and flakes were still coming down Monday morning.

The conditions complicated cleanup efforts. Roads were slick as crews worked to restore power in tornado-ravaged areas.

A fresh blanket of snow also covered storm debris in Henryville, Indiana, where residents were just beginning to pick up the pieces after two tornadoes hit the town, including an EF-4 twister, with winds of up to 200 mph.

Debris and downed power lines forced authorities to block roadways. Half of the town remained without power and gas Monday, Indiana State Police Sgt. Gary Jessee said.

The tornado outbreak began Friday and extended into the next day, affecting millions of people from Indiana to Georgia. At least 42 tornadoes swept across 10 states on Friday, the National Weather Service said.

By the time the powerful storm system faded, 39 were dead: 21 in Kentucky, 13 in Indiana, three in Ohio, and one each in Alabama and Georgia.

20 in Kentucky, 14 in Indiana, three in Ohio and one each in Alabama and Georgia.