go out in these conditions. reporter: drivers carefully navigate past jackknifed semis in lincoln. visibility so low, in some parts of the state, officials even pulled plows off the road. in minnesota, crews like this one take on the backbreaking task of shoveling snow off of sidewalks city-wide. how do you prepare to do this kind of work all day long? mental toughness. reporter: further south in texas, high winds fueled this grass fire in parker county. nearby schools evacuated. this after multiple tornadoes in the south overnight, including an ef-2, winds above 110 miles an hour in bowie county. david, we can make out the tails of those planes, but we can barely see the runway. officials here at minneapolis airport have actually closed that runway a number of times today. more than 500 flights canceled. the same story across much of the midwest. david? all right, what a scene there. adrienne, thank you. that storm barrelling east. let s get right to chief meteorologist ging