he spoke to nbc's stephanie goss. >> it was like looking in the rocky mountains for a show box with a flashlight. >> reporter: it found its target some 13,000 feet below the surface. malaysia airlines flight 370 is believed to be at a depth of 15,000 feet. malaysian officials vow to keep on looking. >> this is a promise that i made to the families of the passengers that we will continue. >> reporter: they vow to keep looking but we're on day 41, and the chances of seeing floating debris are greatly diminished at this point, which means officials might start scaling back the visual search on the water, brian, quite soon. >> katy tur, who remains on the story where the search is based, perth, australia, thanks. >>> extreme weather is having an impact on a big part of this country tonight. the upper midwest, about record cold and yet, more snow. the cold wave extended from south dakota all the way east to new york. snow forecast ranged from a half a foot to 18 inches through tomorrow. heavy flooding is also a big problem tonight, especially in new england with all the melt off. flood war