Blizzard-fueling storm hits Plains and Midwest.
Heavy snow, freezing rain, strong winds cause dangerous holiday travel.
Wind gusts of 50-60 mph, up to 75 mph, may topple trees and power lines.
Survival kits recommended for those on the road; stay in vehicles if stranded.
Sleet and freezing rain may cause power outages and icy roads.
Ice storm warnings in portions of the Dakotas and Minnesota
Storm to wind down Tuesday night, disruptive weather to end midweek.
Treacherous conditions caused accidents and road closures on Christmas Day.
Cautionary advice from authorities
slow down, avoid cruise control, wear seatbelt, give room to snow plows.
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