This is terrible tragedy. It's been few hours since the accident and no words on survivors so it's looking grim. NTSB has lot of work to do to figure out what happened so it won't happen again.
Edit: Just watching the press conference at 1am and they won't talk about survivors or fatalities. It's a bad sign.
2nd Edit: blancolirio video Juan Browne does excellent analysis on aircraft incidents.
3rd Edit: 2nd blancolirio video This update is tough to watch.
That area is not very windy but 32-34F which is pretty cold. Not good.